Eyematics Core Data Set - Local Development build (v2025.0.0-alpha) built by the FHIR (HL7® FHIR® Standard) Build Tools. See the Directory of published versions

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Resource Profile: Visual Acuity (VA) ( Experimental )

An assessment of a patients ability to see

Usage:

• This Resource Profile is not used by any profiles in this Implementation Guide

Formal Views of Profile Content

Description of Profiles, Differentials, Snapshots and how the different presentations work.

• Key Elements Table
• Differential Table
• Snapshot Table
• Statistics/References
• All

Name	Flags	Card.	Type	Description & Constraints
Observation	C	0..*	MII_EyeMatics_OphtalmicObservation	Measurements and simple assertions dom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources dom-3: If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated dom-5: If a resource is contained in another resource, it SHALL NOT have a security label dom-6: A resource should have narrative for robust management obs-6: dataAbsentReason SHALL only be present if Observation.value[x] is not present obs-7: If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present iop-laterality: Seitigkeit vom LOINC-Code und Seitigkeit von Observation.bodySite müssen übereinstimmen.
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created ele-1: All FHIR elements must have a @value or children
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
status	?!Σ	1..1	code	registered | preliminary | final | amended + Binding: ObservationStatus (required): Codes providing the status of an observation. ele-1: All FHIR elements must have a @value or children
Slices for category	S	1..*	CodeableConcept	Classification of type of observation Slice: Unordered, Open by pattern:$this Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories. ele-1: All FHIR elements must have a @value or children
category:exam	S	1..1	CodeableConcept	Classification of type of observation Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories. ele-1: All FHIR elements must have a @value or children Required Pattern: At least the following
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
code		1..1	code	Symbol in syntax defined by the system Fixed Value: exam
code	Σ	1..1	CodeableConcept	Type of observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 260246004
display		1..1	string	Representation defined by the system Fixed Value: Visual Acuity finding
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
coding	Σ	0..*	Coding	Additional codings Binding: Visual Acuity Code (preferred) ele-1: All FHIR elements must have a @value or children
subject	SΣ	1..1	Reference(Patient)	Who and/or what the observation is about ele-1: All FHIR elements must have a @value or children
Slices for value[x]	SΣC	0..1		Actual result Slice: Unordered, Closed by type:$this ele-1: All FHIR elements must have a @value or children
valueQuantity			Quantity
valueCodeableConcept			CodeableConcept
valueString			string
valueRatio			Ratio
value[x]:valueRatio	ΣC	0..1	Ratio	Visual acuity expressed as a Snellen fraction ele-1: All FHIR elements must have a @value or children
value[x]:valueQuantity	ΣC	0..1	Quantity	Visual acuity expressed as a simple quantity ele-1: All FHIR elements must have a @value or children
comparator	?!Σ	0..1	code	< | <= | >= | > - how to understand the value Binding: QuantityComparator (required): How the Quantity should be understood and represented. ele-1: All FHIR elements must have a @value or children
code	Σ	0..1	code	Coded form of the unit Binding: Visual Acuity Units (preferred) ele-1: All FHIR elements must have a @value or children
value[x]:valueCodeableConcept	ΣC	0..1	CodeableConcept	Visual acuity expressed as a code Binding: Visual Acuity Categorial Values (preferred) ele-1: All FHIR elements must have a @value or children
value[x]:valueString	ΣC	0..1	string	Visual acuity expressed as a string (discouraged!) ele-1: All FHIR elements must have a @value or children
note	S	0..*	Annotation	Free text note or Comments about the VA observation ele-1: All FHIR elements must have a @value or children
bodySite	S	1..1	CodeableConcept	Observed body part Binding: Eye.Laterality (required) ele-1: All FHIR elements must have a @value or children
Slices for coding	Σ	1..*	Coding	Code defined by a terminology system Slice: Unordered, Open by pattern:$this ele-1: All FHIR elements must have a @value or children
coding:laterality	SΣ	1..1	Coding	Code defined by a terminology system Binding: Eye.Laterality (required) ele-1: All FHIR elements must have a @value or children
method		0..1	CodeableConcept	VA measurement Method Binding: VA-Methods (preferred) ele-1: All FHIR elements must have a @value or children
coding	Σ	0..1	Coding	Code defined by a terminology system ele-1: All FHIR elements must have a @value or children
referenceRange	C	0..1	BackboneElement	Provides guide for interpretation ele-1: All FHIR elements must have a @value or children obs-3: Must have at least a low or a high or text
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
Slices for component	Σ	0..*	BackboneElement	Component results Slice: Unordered, Open by value:code, value:value ele-1: All FHIR elements must have a @value or children
component:All Slices				Content/Rules for all slices
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children
component:Correction-in-front-of-right-eye	Σ	0..1	BackboneElement	Component results ele-1: All FHIR elements must have a @value or children
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
extension:LensDuringVATestSpecification		0..1	(Complex)	Extension URL: https://larfuma.github.io/fhir-eyecare-ig/StructureDefinition/LensDuringVATestSpecification ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://loinc.org
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 29073-4
display		1..1	string	Representation defined by the system Fixed Value: Right Eye position
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Visual Acuity Correction Methods (preferred) ele-1: All FHIR elements must have a @value or children
component:Correction-in-front-of-left-eye	Σ	0..1	BackboneElement	Component results ele-1: All FHIR elements must have a @value or children
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
extension:LensDuringVATestSpecification		0..1	(Complex)	Extension URL: https://larfuma.github.io/fhir-eyecare-ig/StructureDefinition/LensDuringVATestSpecification ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://loinc.org
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 29074-2
display		1..1	string	Representation defined by the system Fixed Value: Left eye Position
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Visual Acuity Correction Methods (preferred) ele-1: All FHIR elements must have a @value or children
component:Test-Distance	Σ	0..1	BackboneElement	Distance of Visual acuity Test ele-1: All FHIR elements must have a @value or children
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 252124009
display		1..1	string	Representation defined by the system Fixed Value: Test distance
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
Slices for value[x]	Σ	0..1		Actual component result Slice: Unordered, Open by type:$this ele-1: All FHIR elements must have a @value or children
valueQuantity			Quantity
valueCodeableConcept			CodeableConcept
value[x]:valueCodeableConcept	Σ	0..1	CodeableConcept	Measurement Distance as Coded Concept Binding: Visual Acuity Test Distance (preferred) ele-1: All FHIR elements must have a @value or children
component:Optotype-used	Σ	0..1	BackboneElement	Optotype used ele-1: All FHIR elements must have a @value or children
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		0..0	uri	Identity of the terminology system
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: Optotype
display		1..1	string	Representation defined by the system Fixed Value: Optotype
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Visual Acuity Optotypes (preferred) ele-1: All FHIR elements must have a @value or children
component:Myadrisis	Σ	0..1	BackboneElement	Component results ele-1: All FHIR elements must have a @value or children
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 37125009
display		1..1	string	Representation defined by the system Fixed Value: Dilated pupil (finding)
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Performed-NotPerformed (required) ele-1: All FHIR elements must have a @value or children
component:Pinhole Occluder used	Σ	0..1	BackboneElement	Component results ele-1: All FHIR elements must have a @value or children
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 257492003
display		1..1	string	Representation defined by the system Fixed Value: Pinhole (physical object)
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Used-NotUsed (required) ele-1: All FHIR elements must have a @value or children
component:SpecialVATestingParameters	Σ	0..*	BackboneElement	Component results ele-1: All FHIR elements must have a @value or children
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 370115009
display		1..1	string	Representation defined by the system Fixed Value: Special Concept
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Visual Acuity Special Testing Parameters (preferred) ele-1: All FHIR elements must have a @value or children
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet / Code	URI
Observation.status	required	ObservationStatus http://hl7.org/fhir/ValueSet/observation-status|4.0.1 from the FHIR Standard
Observation.category	preferred	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category from the FHIR Standard
Observation.category:exam	preferred	Pattern: exam http://hl7.org/fhir/ValueSet/observation-category from the FHIR Standard
Observation.code	example	Fixed Value: SNOMED-CT Code 260246004("Visual Acuity finding") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.code.coding	preferred	VS_VA_Code https://eyematics.org/fhir/eyematics-kds/ValueSet/va-code from this IG
Observation.value[x]:valueQuantity.comparator	required	QuantityComparator http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1 from the FHIR Standard
Observation.value[x]:valueQuantity.code	preferred	VS_VA_Quantity_Units (a valid code from Visual Acuity Units) https://eyematics.org/fhir/eyematics-kds/ValueSet/va-quantity-units from this IG
Observation.value[x]:valueCodeableConcept	preferred	VS_VA_Categorial_Values https://eyematics.org/fhir/eyematics-kds/ValueSet/va-categorial-values from this IG
Observation.bodySite	required	VS_Eye_Laterality https://eyematics.org/fhir/eyematics-kds/ValueSet/eye-laterality from this IG
Observation.bodySite.coding:laterality	required	VS_Eye_Laterality https://eyematics.org/fhir/eyematics-kds/ValueSet/eye-laterality from this IG
Observation.method	preferred	VS_VA_Methods https://eyematics.org/fhir/eyematics-kds/ValueSet/va-methods from this IG
Observation.component.code	example	LOINCCodes (a valid code from LOINC) http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Correction-in-front-of-right-eye.code	example	Fixed Value: LOINC Code 29073-4("Right Eye position") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Correction-in-front-of-right-eye.value[x]	preferred	VS_VA_Correction_Method https://eyematics.org/fhir/eyematics-kds/ValueSet/va-correction-method from this IG
Observation.component:Correction-in-front-of-left-eye.code	example	Fixed Value: LOINC Code 29074-2("Left eye Position") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Correction-in-front-of-left-eye.value[x]	preferred	VS_VA_Correction_Method https://eyematics.org/fhir/eyematics-kds/ValueSet/va-correction-method from this IG
Observation.component:Test-Distance.code	example	Fixed Value: SNOMED-CT Code 252124009("Test distance") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Test-Distance.value[x]:valueCodeableConcept	preferred	VS_VA_Test_Distance https://eyematics.org/fhir/eyematics-kds/ValueSet/va-test-distance from this IG
Observation.component:Optotype-used.code	example	Fixed Value: Optotype("Optotype") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Optotype-used.value[x]	preferred	VS_VA_Optotypes https://eyematics.org/fhir/eyematics-kds/ValueSet/va-optotypes from this IG
Observation.component:Myadrisis.code	example	Fixed Value: SNOMED-CT Code 37125009("Dilated pupil (finding)") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Myadrisis.value[x]	required	VS_Performed_NotPerformed https://eyematics.org/fhir/eyematics-kds/ValueSet/performed-notperformed from this IG
Observation.component:Pinhole Occluder used.code	example	Fixed Value: SNOMED-CT Code 257492003("Pinhole (physical object)") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Pinhole Occluder used.value[x]	required	VS_Used_NotUsed https://eyematics.org/fhir/eyematics-kds/ValueSet/used-notused from this IG
Observation.component:SpecialVATestingParameters.code	example	Fixed Value: SNOMED-CT Code 370115009("Special Concept") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:SpecialVATestingParameters.value[x]	preferred	VS_VA_Special_Testing_Parameters https://eyematics.org/fhir/eyematics-kds/ValueSet/va-special-testing-parameters from this IG

Constraints

Id	Grade	Path(s)	Details	Requirements
dom-2	error	Observation	If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty()
dom-3	error	Observation	If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource : contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4	error	Observation	If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated : contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5	error	Observation	If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty()
dom-6	best practice	Observation	A resource should have narrative for robust management : text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()
iop-laterality	error	Observation	Seitigkeit vom LOINC-Code und Seitigkeit von Observation.bodySite müssen übereinstimmen. : (Observation.code.coding.where(code='79893-4').exists() implies bodySite.coding.code = '1290041000') and (Observation.code.coding.where(code='79892-6').exists() implies bodySite.coding.code = '79892-6')
obs-3	error	Observation.referenceRange	Must have at least a low or a high or text : low.exists() or high.exists() or text.exists()
obs-6	error	Observation	dataAbsentReason SHALL only be present if Observation.value[x] is not present : dataAbsentReason.empty() or value.empty()
obs-7	error	Observation	If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present : value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()

This structure is derived from MII_EyeMatics_OphtalmicObservation

Name	Flags	Card.	Type	Description & Constraints
Observation		0..*	MII_EyeMatics_OphtalmicObservation	Measurements and simple assertions
code		1..1	CodeableConcept	Type of observation (code / type) Fixed Value: As shown
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 260246004
display		1..1	string	Representation defined by the system Fixed Value: Visual Acuity finding
coding		0..*	Coding	Additional codings Binding: Visual Acuity Code (preferred)
Slices for value[x]	S	0..1		Actual result Slice: Unordered, Open by type:$this
valueQuantity			Quantity
valueCodeableConcept			CodeableConcept
valueString			string
valueRatio			Ratio
value[x]:valueRatio		0..1	Ratio	Visual acuity expressed as a Snellen fraction
value[x]:valueQuantity		0..1	Quantity	Visual acuity expressed as a simple quantity
code		0..1	code	Coded form of the unit Binding: Visual Acuity Units (preferred)
value[x]:valueCodeableConcept		0..1	CodeableConcept	Visual acuity expressed as a code Binding: Visual Acuity Categorial Values (preferred)
value[x]:valueString		0..1	string	Visual acuity expressed as a string (discouraged!)
note	S	0..*	Annotation	Free text note or Comments about the VA observation
bodySite		1..1	CodeableConcept	Observed body part Binding: Eye.Laterality (required)
method		0..1	CodeableConcept	VA measurement Method Binding: VA-Methods (preferred)
coding		0..1	Coding	Code defined by a terminology system
referenceRange		0..1	BackboneElement	Provides guide for interpretation
Slices for component		0..*	BackboneElement	Component results Slice: Unordered, Open by value:code, value:value
component:Correction-in-front-of-right-eye		0..1	BackboneElement	Component results
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url
extension:LensDuringVATestSpecification		0..1	(Complex)	Extension URL: https://larfuma.github.io/fhir-eyecare-ig/StructureDefinition/LensDuringVATestSpecification
code		1..1	CodeableConcept	Type of component observation (code / type) Fixed Value: As shown
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://loinc.org
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 29073-4
display		1..1	string	Representation defined by the system Fixed Value: Right Eye position
value[x]		0..1	CodeableConcept	Actual component result Binding: Visual Acuity Correction Methods (preferred)
component:Correction-in-front-of-left-eye		0..1	BackboneElement	Component results
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url
extension:LensDuringVATestSpecification		0..1	(Complex)	Extension URL: https://larfuma.github.io/fhir-eyecare-ig/StructureDefinition/LensDuringVATestSpecification
code		1..1	CodeableConcept	Type of component observation (code / type) Fixed Value: As shown
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://loinc.org
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 29074-2
display		1..1	string	Representation defined by the system Fixed Value: Left eye Position
value[x]		0..1	CodeableConcept	Actual component result Binding: Visual Acuity Correction Methods (preferred)
component:Test-Distance		0..1	BackboneElement	Distance of Visual acuity Test
code		1..1	CodeableConcept	Type of component observation (code / type) Fixed Value: As shown
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 252124009
display		1..1	string	Representation defined by the system Fixed Value: Test distance
Slices for value[x]		0..1		Actual component result Slice: Unordered, Open by type:$this
valueQuantity			Quantity
valueCodeableConcept			CodeableConcept
value[x]:valueCodeableConcept		0..1	CodeableConcept	Measurement Distance as Coded Concept Binding: Visual Acuity Test Distance (preferred)
component:Optotype-used		0..1	BackboneElement	Optotype used
code		1..1	CodeableConcept	Type of component observation (code / type) Fixed Value: As shown
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
code		1..1	code	Symbol in syntax defined by the system Fixed Value: Optotype
display		1..1	string	Representation defined by the system Fixed Value: Optotype
value[x]		0..1	CodeableConcept	Actual component result Binding: Visual Acuity Optotypes (preferred)
component:Myadrisis		0..1	BackboneElement	Component results
code		1..1	CodeableConcept	Type of component observation (code / type) Fixed Value: As shown
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 37125009
display		1..1	string	Representation defined by the system Fixed Value: Dilated pupil (finding)
value[x]		0..1	CodeableConcept	Actual component result Binding: Performed-NotPerformed (required)
component:Pinhole Occluder used		0..1	BackboneElement	Component results
code		1..1	CodeableConcept	Type of component observation (code / type) Fixed Value: As shown
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 257492003
display		1..1	string	Representation defined by the system Fixed Value: Pinhole (physical object)
value[x]		0..1	CodeableConcept	Actual component result Binding: Used-NotUsed (required)
component:SpecialVATestingParameters		0..*	BackboneElement	Component results
code		1..1	CodeableConcept	Type of component observation (code / type) Fixed Value: As shown
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 370115009
display		1..1	string	Representation defined by the system Fixed Value: Special Concept
value[x]		0..1	CodeableConcept	Actual component result Binding: Visual Acuity Special Testing Parameters (preferred)
Documentation for this format

Terminology Bindings (Differential)

Path	Conformance	ValueSet	URI
Observation.code.coding	preferred	VS_VA_Code https://eyematics.org/fhir/eyematics-kds/ValueSet/va-code from this IG
Observation.value[x]:valueQuantity.code	preferred	VS_VA_Quantity_Units (a valid code from Visual Acuity Units) https://eyematics.org/fhir/eyematics-kds/ValueSet/va-quantity-units from this IG
Observation.value[x]:valueCodeableConcept	preferred	VS_VA_Categorial_Values https://eyematics.org/fhir/eyematics-kds/ValueSet/va-categorial-values from this IG
Observation.bodySite	required	VS_Eye_Laterality https://eyematics.org/fhir/eyematics-kds/ValueSet/eye-laterality from this IG
Observation.method	preferred	VS_VA_Methods https://eyematics.org/fhir/eyematics-kds/ValueSet/va-methods from this IG
Observation.component:Correction-in-front-of-right-eye.value[x]	preferred	VS_VA_Correction_Method https://eyematics.org/fhir/eyematics-kds/ValueSet/va-correction-method from this IG
Observation.component:Correction-in-front-of-left-eye.value[x]	preferred	VS_VA_Correction_Method https://eyematics.org/fhir/eyematics-kds/ValueSet/va-correction-method from this IG
Observation.component:Test-Distance.value[x]:valueCodeableConcept	preferred	VS_VA_Test_Distance https://eyematics.org/fhir/eyematics-kds/ValueSet/va-test-distance from this IG
Observation.component:Optotype-used.value[x]	preferred	VS_VA_Optotypes https://eyematics.org/fhir/eyematics-kds/ValueSet/va-optotypes from this IG
Observation.component:Myadrisis.value[x]	required	VS_Performed_NotPerformed https://eyematics.org/fhir/eyematics-kds/ValueSet/performed-notperformed from this IG
Observation.component:Pinhole Occluder used.value[x]	required	VS_Used_NotUsed https://eyematics.org/fhir/eyematics-kds/ValueSet/used-notused from this IG
Observation.component:SpecialVATestingParameters.value[x]	preferred	VS_VA_Special_Testing_Parameters https://eyematics.org/fhir/eyematics-kds/ValueSet/va-special-testing-parameters from this IG

Name	Flags	Card.	Type	Description & Constraints
Observation	C	0..*	MII_EyeMatics_OphtalmicObservation	Measurements and simple assertions obs-6: dataAbsentReason SHALL only be present if Observation.value[x] is not present obs-7: If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present iop-laterality: Seitigkeit vom LOINC-Code und Seitigkeit von Observation.bodySite müssen übereinstimmen.
id	Σ	0..1	id	Logical id of this artifact
meta	Σ	0..1	Meta	Metadata about the resource
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created
language		0..1	code	Language of the resource content Binding: CommonLanguages (preferred): A human language. Additional Bindings Purpose AllLanguages Max Binding
text		0..1	Narrative	Text summary of the resource, for human interpretation
contained		0..*	Resource	Contained, inline Resources
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
identifier	Σ	0..*	Identifier	Business Identifier for observation
basedOn	Σ	0..*	Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest)	Fulfills plan, proposal or order
partOf	Σ	0..*	Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy)	Part of referenced event
status	?!Σ	1..1	code	registered | preliminary | final | amended + Binding: ObservationStatus (required): Codes providing the status of an observation.
Slices for category	S	1..*	CodeableConcept	Classification of type of observation Slice: Unordered, Open by pattern:$this Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
category:exam	S	1..1	CodeableConcept	Classification of type of observation Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories. Required Pattern: At least the following
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
version		0..1	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: exam
display		0..1	string	Representation defined by the system
userSelected		0..1	boolean	If this coding was chosen directly by the user
text		0..1	string	Plain text representation of the concept
code	Σ	1..1	CodeableConcept	Type of observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 260246004
display		1..1	string	Representation defined by the system Fixed Value: Visual Acuity finding
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
coding	Σ	0..*	Coding	Additional codings Binding: Visual Acuity Code (preferred)
text	Σ	0..1	string	Plain text representation of the concept
subject	SΣ	1..1	Reference(Patient)	Who and/or what the observation is about
focus	Σ	0..*	Reference(Resource)	What the observation is about, when it is not about the subject of record
encounter	Σ	0..1	Reference(Encounter)	Healthcare event during which this observation is made
effective[x]	Σ	0..1		Clinically relevant time/time-period for observation
effectiveDateTime			dateTime
effectivePeriod			Period
effectiveTiming			Timing
effectiveInstant			instant
issued	Σ	0..1	instant	Date/Time this version was made available
performer	Σ	0..*	Reference(Practitioner | PractitionerRole | Organization | CareTeam | Patient | RelatedPerson)	Who is responsible for the observation
Slices for value[x]	SΣC	0..1		Actual result Slice: Unordered, Closed by type:$this
valueQuantity			Quantity
valueCodeableConcept			CodeableConcept
valueString			string
valueRatio			Ratio
value[x]:valueRatio	ΣC	0..1	Ratio	Visual acuity expressed as a Snellen fraction
value[x]:valueQuantity	ΣC	0..1	Quantity	Visual acuity expressed as a simple quantity
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
value	Σ	0..1	decimal	Numerical value (with implicit precision)
comparator	?!Σ	0..1	code	< | <= | >= | > - how to understand the value Binding: QuantityComparator (required): How the Quantity should be understood and represented.
unit	Σ	0..1	string	Unit representation
system	ΣC	0..1	uri	System that defines coded unit form
code	Σ	0..1	code	Coded form of the unit Binding: Visual Acuity Units (preferred)
value[x]:valueCodeableConcept	ΣC	0..1	CodeableConcept	Visual acuity expressed as a code Binding: Visual Acuity Categorial Values (preferred)
value[x]:valueString	ΣC	0..1	string	Visual acuity expressed as a string (discouraged!)
dataAbsentReason	C	0..1	CodeableConcept	Why the result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
note	S	0..*	Annotation	Free text note or Comments about the VA observation
bodySite	S	1..1	CodeableConcept	Observed body part Binding: Eye.Laterality (required)
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
Slices for coding	Σ	1..*	Coding	Code defined by a terminology system Slice: Unordered, Open by pattern:$this
coding:laterality	SΣ	1..1	Coding	Code defined by a terminology system Binding: Eye.Laterality (required)
text	Σ	0..1	string	Plain text representation of the concept
method		0..1	CodeableConcept	VA measurement Method Binding: VA-Methods (preferred)
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
coding	Σ	0..1	Coding	Code defined by a terminology system
text	Σ	0..1	string	Plain text representation of the concept
specimen		0..1	Reference(Specimen)	Specimen used for this observation
device		0..1	Reference(Device | DeviceMetric)	(Measurement) Device
referenceRange	C	0..1	BackboneElement	Provides guide for interpretation obs-3: Must have at least a low or a high or text
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
low	C	0..1	SimpleQuantity	Low Range, if relevant
high	C	0..1	SimpleQuantity	High Range, if relevant
type		0..1	CodeableConcept	Reference range qualifier Binding: ObservationReferenceRangeMeaningCodes (preferred): Code for the meaning of a reference range.
appliesTo		0..*	CodeableConcept	Reference range population Binding: ObservationReferenceRangeAppliesToCodes (example): Codes identifying the population the reference range applies to.
age		0..1	Range	Applicable age range, if relevant
text		0..1	string	Text based reference range in an observation
hasMember	Σ	0..*	Reference(Observation | QuestionnaireResponse | MolecularSequence)	Related resource that belongs to the Observation group
derivedFrom	Σ	0..*	Reference(DocumentReference | ImagingStudy | Media | QuestionnaireResponse | Observation | MolecularSequence)	Related measurements the observation is made from
Slices for component	Σ	0..*	BackboneElement	Component results Slice: Unordered, Open by value:code, value:value
component:All Slices				Content/Rules for all slices
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations.
value[x]	Σ	0..1		Actual component result
valueQuantity			Quantity
valueCodeableConcept			CodeableConcept
valueString			string
valueBoolean			boolean
valueInteger			integer
valueRange			Range
valueRatio			Ratio
valueSampledData			SampledData
valueTime			time
valueDateTime			dateTime
valuePeriod			Period
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
component:Correction-in-front-of-right-eye	Σ	0..1	BackboneElement	Component results
id		0..1	string	Unique id for inter-element referencing
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url
extension:LensDuringVATestSpecification		0..1	(Complex)	Extension URL: https://larfuma.github.io/fhir-eyecare-ig/StructureDefinition/LensDuringVATestSpecification
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://loinc.org
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 29073-4
display		1..1	string	Representation defined by the system Fixed Value: Right Eye position
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Visual Acuity Correction Methods (preferred)
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
component:Correction-in-front-of-left-eye	Σ	0..1	BackboneElement	Component results
id		0..1	string	Unique id for inter-element referencing
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url
extension:LensDuringVATestSpecification		0..1	(Complex)	Extension URL: https://larfuma.github.io/fhir-eyecare-ig/StructureDefinition/LensDuringVATestSpecification
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://loinc.org
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 29074-2
display		1..1	string	Representation defined by the system Fixed Value: Left eye Position
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Visual Acuity Correction Methods (preferred)
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
component:Test-Distance	Σ	0..1	BackboneElement	Distance of Visual acuity Test
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 252124009
display		1..1	string	Representation defined by the system Fixed Value: Test distance
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
Slices for value[x]	Σ	0..1		Actual component result Slice: Unordered, Open by type:$this
valueQuantity			Quantity
valueCodeableConcept			CodeableConcept
value[x]:valueCodeableConcept	Σ	0..1	CodeableConcept	Measurement Distance as Coded Concept Binding: Visual Acuity Test Distance (preferred)
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
component:Optotype-used	Σ	0..1	BackboneElement	Optotype used
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		0..0	uri	Identity of the terminology system
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: Optotype
display		1..1	string	Representation defined by the system Fixed Value: Optotype
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Visual Acuity Optotypes (preferred)
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
component:Myadrisis	Σ	0..1	BackboneElement	Component results
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 37125009
display		1..1	string	Representation defined by the system Fixed Value: Dilated pupil (finding)
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Performed-NotPerformed (required)
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
component:Pinhole Occluder used	Σ	0..1	BackboneElement	Component results
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 257492003
display		1..1	string	Representation defined by the system Fixed Value: Pinhole (physical object)
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Used-NotUsed (required)
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
component:SpecialVATestingParameters	Σ	0..*	BackboneElement	Component results
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 370115009
display		1..1	string	Representation defined by the system Fixed Value: Special Concept
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Visual Acuity Special Testing Parameters (preferred)
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet / Code	URI
Observation.language	preferred	CommonLanguages http://hl7.org/fhir/ValueSet/languages from the FHIR Standard Additional Bindings Purpose AllLanguages Max Binding
Observation.status	required	ObservationStatus http://hl7.org/fhir/ValueSet/observation-status|4.0.1 from the FHIR Standard
Observation.category	preferred	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category from the FHIR Standard
Observation.category:exam	preferred	Pattern: exam http://hl7.org/fhir/ValueSet/observation-category from the FHIR Standard
Observation.code	example	Fixed Value: SNOMED-CT Code 260246004("Visual Acuity finding") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.code.coding	preferred	VS_VA_Code https://eyematics.org/fhir/eyematics-kds/ValueSet/va-code from this IG
Observation.value[x]:valueQuantity.comparator	required	QuantityComparator http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1 from the FHIR Standard
Observation.value[x]:valueQuantity.code	preferred	VS_VA_Quantity_Units (a valid code from Visual Acuity Units) https://eyematics.org/fhir/eyematics-kds/ValueSet/va-quantity-units from this IG
Observation.value[x]:valueCodeableConcept	preferred	VS_VA_Categorial_Values https://eyematics.org/fhir/eyematics-kds/ValueSet/va-categorial-values from this IG
Observation.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.bodySite	required	VS_Eye_Laterality https://eyematics.org/fhir/eyematics-kds/ValueSet/eye-laterality from this IG
Observation.bodySite.coding:laterality	required	VS_Eye_Laterality https://eyematics.org/fhir/eyematics-kds/ValueSet/eye-laterality from this IG
Observation.method	preferred	VS_VA_Methods https://eyematics.org/fhir/eyematics-kds/ValueSet/va-methods from this IG
Observation.referenceRange.type	preferred	ObservationReferenceRangeMeaningCodes http://hl7.org/fhir/ValueSet/referencerange-meaning from the FHIR Standard
Observation.referenceRange.appliesTo	example	ObservationReferenceRangeAppliesToCodes http://hl7.org/fhir/ValueSet/referencerange-appliesto from the FHIR Standard
Observation.component.code	example	LOINCCodes (a valid code from LOINC) http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:Correction-in-front-of-right-eye.code	example	Fixed Value: LOINC Code 29073-4("Right Eye position") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Correction-in-front-of-right-eye.value[x]	preferred	VS_VA_Correction_Method https://eyematics.org/fhir/eyematics-kds/ValueSet/va-correction-method from this IG
Observation.component:Correction-in-front-of-right-eye.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:Correction-in-front-of-right-eye.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:Correction-in-front-of-left-eye.code	example	Fixed Value: LOINC Code 29074-2("Left eye Position") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Correction-in-front-of-left-eye.value[x]	preferred	VS_VA_Correction_Method https://eyematics.org/fhir/eyematics-kds/ValueSet/va-correction-method from this IG
Observation.component:Correction-in-front-of-left-eye.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:Correction-in-front-of-left-eye.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:Test-Distance.code	example	Fixed Value: SNOMED-CT Code 252124009("Test distance") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Test-Distance.value[x]:valueCodeableConcept	preferred	VS_VA_Test_Distance https://eyematics.org/fhir/eyematics-kds/ValueSet/va-test-distance from this IG
Observation.component:Test-Distance.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:Test-Distance.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:Optotype-used.code	example	Fixed Value: Optotype("Optotype") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Optotype-used.value[x]	preferred	VS_VA_Optotypes https://eyematics.org/fhir/eyematics-kds/ValueSet/va-optotypes from this IG
Observation.component:Optotype-used.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:Optotype-used.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:Myadrisis.code	example	Fixed Value: SNOMED-CT Code 37125009("Dilated pupil (finding)") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Myadrisis.value[x]	required	VS_Performed_NotPerformed https://eyematics.org/fhir/eyematics-kds/ValueSet/performed-notperformed from this IG
Observation.component:Myadrisis.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:Myadrisis.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:Pinhole Occluder used.code	example	Fixed Value: SNOMED-CT Code 257492003("Pinhole (physical object)") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Pinhole Occluder used.value[x]	required	VS_Used_NotUsed https://eyematics.org/fhir/eyematics-kds/ValueSet/used-notused from this IG
Observation.component:Pinhole Occluder used.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:Pinhole Occluder used.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:SpecialVATestingParameters.code	example	Fixed Value: SNOMED-CT Code 370115009("Special Concept") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:SpecialVATestingParameters.value[x]	preferred	VS_VA_Special_Testing_Parameters https://eyematics.org/fhir/eyematics-kds/ValueSet/va-special-testing-parameters from this IG
Observation.component:SpecialVATestingParameters.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:SpecialVATestingParameters.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard

Constraints

Id	Grade	Path(s)	Details	Requirements
dom-2	error	Observation	If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty()
dom-3	error	Observation	If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource : contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4	error	Observation	If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated : contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5	error	Observation	If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty()
dom-6	best practice	Observation	A resource should have narrative for robust management : text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()
iop-laterality	error	Observation	Seitigkeit vom LOINC-Code und Seitigkeit von Observation.bodySite müssen übereinstimmen. : (Observation.code.coding.where(code='79893-4').exists() implies bodySite.coding.code = '1290041000') and (Observation.code.coding.where(code='79892-6').exists() implies bodySite.coding.code = '79892-6')
obs-3	error	Observation.referenceRange	Must have at least a low or a high or text : low.exists() or high.exists() or text.exists()
obs-6	error	Observation	dataAbsentReason SHALL only be present if Observation.value[x] is not present : dataAbsentReason.empty() or value.empty()
obs-7	error	Observation	If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present : value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()

This structure is derived from MII_EyeMatics_OphtalmicObservation

Summary

Mandatory: 1 element
Must-Support: 2 elements
Fixed: 8 elements

Extensions

This structure refers to these extensions:

• https://larfuma.github.io/fhir-eyecare-ig/StructureDefinition/LensDuringVATestSpecification

Slices

This structure defines the following Slices:

• The element 1 is sliced based on the value of Observation.value[x]
• The element 2 is sliced based on the values of Observation.component
• The element 1 is sliced based on the value of Observation.component.value[x]

Key Elements View

Name	Flags	Card.	Type	Description & Constraints
Observation	C	0..*	MII_EyeMatics_OphtalmicObservation	Measurements and simple assertions dom-2: If the resource is contained in another resource, it SHALL NOT contain nested Resources dom-3: If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource dom-4: If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated dom-5: If a resource is contained in another resource, it SHALL NOT have a security label dom-6: A resource should have narrative for robust management obs-6: dataAbsentReason SHALL only be present if Observation.value[x] is not present obs-7: If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present iop-laterality: Seitigkeit vom LOINC-Code und Seitigkeit von Observation.bodySite müssen übereinstimmen.
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created ele-1: All FHIR elements must have a @value or children
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
status	?!Σ	1..1	code	registered | preliminary | final | amended + Binding: ObservationStatus (required): Codes providing the status of an observation. ele-1: All FHIR elements must have a @value or children
Slices for category	S	1..*	CodeableConcept	Classification of type of observation Slice: Unordered, Open by pattern:$this Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories. ele-1: All FHIR elements must have a @value or children
category:exam	S	1..1	CodeableConcept	Classification of type of observation Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories. ele-1: All FHIR elements must have a @value or children Required Pattern: At least the following
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
code		1..1	code	Symbol in syntax defined by the system Fixed Value: exam
code	Σ	1..1	CodeableConcept	Type of observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 260246004
display		1..1	string	Representation defined by the system Fixed Value: Visual Acuity finding
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
coding	Σ	0..*	Coding	Additional codings Binding: Visual Acuity Code (preferred) ele-1: All FHIR elements must have a @value or children
subject	SΣ	1..1	Reference(Patient)	Who and/or what the observation is about ele-1: All FHIR elements must have a @value or children
Slices for value[x]	SΣC	0..1		Actual result Slice: Unordered, Closed by type:$this ele-1: All FHIR elements must have a @value or children
valueQuantity			Quantity
valueCodeableConcept			CodeableConcept
valueString			string
valueRatio			Ratio
value[x]:valueRatio	ΣC	0..1	Ratio	Visual acuity expressed as a Snellen fraction ele-1: All FHIR elements must have a @value or children
value[x]:valueQuantity	ΣC	0..1	Quantity	Visual acuity expressed as a simple quantity ele-1: All FHIR elements must have a @value or children
comparator	?!Σ	0..1	code	< | <= | >= | > - how to understand the value Binding: QuantityComparator (required): How the Quantity should be understood and represented. ele-1: All FHIR elements must have a @value or children
code	Σ	0..1	code	Coded form of the unit Binding: Visual Acuity Units (preferred) ele-1: All FHIR elements must have a @value or children
value[x]:valueCodeableConcept	ΣC	0..1	CodeableConcept	Visual acuity expressed as a code Binding: Visual Acuity Categorial Values (preferred) ele-1: All FHIR elements must have a @value or children
value[x]:valueString	ΣC	0..1	string	Visual acuity expressed as a string (discouraged!) ele-1: All FHIR elements must have a @value or children
note	S	0..*	Annotation	Free text note or Comments about the VA observation ele-1: All FHIR elements must have a @value or children
bodySite	S	1..1	CodeableConcept	Observed body part Binding: Eye.Laterality (required) ele-1: All FHIR elements must have a @value or children
Slices for coding	Σ	1..*	Coding	Code defined by a terminology system Slice: Unordered, Open by pattern:$this ele-1: All FHIR elements must have a @value or children
coding:laterality	SΣ	1..1	Coding	Code defined by a terminology system Binding: Eye.Laterality (required) ele-1: All FHIR elements must have a @value or children
method		0..1	CodeableConcept	VA measurement Method Binding: VA-Methods (preferred) ele-1: All FHIR elements must have a @value or children
coding	Σ	0..1	Coding	Code defined by a terminology system ele-1: All FHIR elements must have a @value or children
referenceRange	C	0..1	BackboneElement	Provides guide for interpretation ele-1: All FHIR elements must have a @value or children obs-3: Must have at least a low or a high or text
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
Slices for component	Σ	0..*	BackboneElement	Component results Slice: Unordered, Open by value:code, value:value ele-1: All FHIR elements must have a @value or children
component:All Slices				Content/Rules for all slices
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children
component:Correction-in-front-of-right-eye	Σ	0..1	BackboneElement	Component results ele-1: All FHIR elements must have a @value or children
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
extension:LensDuringVATestSpecification		0..1	(Complex)	Extension URL: https://larfuma.github.io/fhir-eyecare-ig/StructureDefinition/LensDuringVATestSpecification ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://loinc.org
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 29073-4
display		1..1	string	Representation defined by the system Fixed Value: Right Eye position
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Visual Acuity Correction Methods (preferred) ele-1: All FHIR elements must have a @value or children
component:Correction-in-front-of-left-eye	Σ	0..1	BackboneElement	Component results ele-1: All FHIR elements must have a @value or children
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
extension:LensDuringVATestSpecification		0..1	(Complex)	Extension URL: https://larfuma.github.io/fhir-eyecare-ig/StructureDefinition/LensDuringVATestSpecification ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://loinc.org
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 29074-2
display		1..1	string	Representation defined by the system Fixed Value: Left eye Position
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Visual Acuity Correction Methods (preferred) ele-1: All FHIR elements must have a @value or children
component:Test-Distance	Σ	0..1	BackboneElement	Distance of Visual acuity Test ele-1: All FHIR elements must have a @value or children
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 252124009
display		1..1	string	Representation defined by the system Fixed Value: Test distance
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
Slices for value[x]	Σ	0..1		Actual component result Slice: Unordered, Open by type:$this ele-1: All FHIR elements must have a @value or children
valueQuantity			Quantity
valueCodeableConcept			CodeableConcept
value[x]:valueCodeableConcept	Σ	0..1	CodeableConcept	Measurement Distance as Coded Concept Binding: Visual Acuity Test Distance (preferred) ele-1: All FHIR elements must have a @value or children
component:Optotype-used	Σ	0..1	BackboneElement	Optotype used ele-1: All FHIR elements must have a @value or children
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		0..0	uri	Identity of the terminology system
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: Optotype
display		1..1	string	Representation defined by the system Fixed Value: Optotype
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Visual Acuity Optotypes (preferred) ele-1: All FHIR elements must have a @value or children
component:Myadrisis	Σ	0..1	BackboneElement	Component results ele-1: All FHIR elements must have a @value or children
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 37125009
display		1..1	string	Representation defined by the system Fixed Value: Dilated pupil (finding)
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Performed-NotPerformed (required) ele-1: All FHIR elements must have a @value or children
component:Pinhole Occluder used	Σ	0..1	BackboneElement	Component results ele-1: All FHIR elements must have a @value or children
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 257492003
display		1..1	string	Representation defined by the system Fixed Value: Pinhole (physical object)
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Used-NotUsed (required) ele-1: All FHIR elements must have a @value or children
component:SpecialVATestingParameters	Σ	0..*	BackboneElement	Component results ele-1: All FHIR elements must have a @value or children
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized ele-1: All FHIR elements must have a @value or children ext-1: Must have either extensions or value[x], not both
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. ele-1: All FHIR elements must have a @value or children Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 370115009
display		1..1	string	Representation defined by the system Fixed Value: Special Concept
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Visual Acuity Special Testing Parameters (preferred) ele-1: All FHIR elements must have a @value or children
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet / Code	URI
Observation.status	required	ObservationStatus http://hl7.org/fhir/ValueSet/observation-status|4.0.1 from the FHIR Standard
Observation.category	preferred	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category from the FHIR Standard
Observation.category:exam	preferred	Pattern: exam http://hl7.org/fhir/ValueSet/observation-category from the FHIR Standard
Observation.code	example	Fixed Value: SNOMED-CT Code 260246004("Visual Acuity finding") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.code.coding	preferred	VS_VA_Code https://eyematics.org/fhir/eyematics-kds/ValueSet/va-code from this IG
Observation.value[x]:valueQuantity.comparator	required	QuantityComparator http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1 from the FHIR Standard
Observation.value[x]:valueQuantity.code	preferred	VS_VA_Quantity_Units (a valid code from Visual Acuity Units) https://eyematics.org/fhir/eyematics-kds/ValueSet/va-quantity-units from this IG
Observation.value[x]:valueCodeableConcept	preferred	VS_VA_Categorial_Values https://eyematics.org/fhir/eyematics-kds/ValueSet/va-categorial-values from this IG
Observation.bodySite	required	VS_Eye_Laterality https://eyematics.org/fhir/eyematics-kds/ValueSet/eye-laterality from this IG
Observation.bodySite.coding:laterality	required	VS_Eye_Laterality https://eyematics.org/fhir/eyematics-kds/ValueSet/eye-laterality from this IG
Observation.method	preferred	VS_VA_Methods https://eyematics.org/fhir/eyematics-kds/ValueSet/va-methods from this IG
Observation.component.code	example	LOINCCodes (a valid code from LOINC) http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Correction-in-front-of-right-eye.code	example	Fixed Value: LOINC Code 29073-4("Right Eye position") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Correction-in-front-of-right-eye.value[x]	preferred	VS_VA_Correction_Method https://eyematics.org/fhir/eyematics-kds/ValueSet/va-correction-method from this IG
Observation.component:Correction-in-front-of-left-eye.code	example	Fixed Value: LOINC Code 29074-2("Left eye Position") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Correction-in-front-of-left-eye.value[x]	preferred	VS_VA_Correction_Method https://eyematics.org/fhir/eyematics-kds/ValueSet/va-correction-method from this IG
Observation.component:Test-Distance.code	example	Fixed Value: SNOMED-CT Code 252124009("Test distance") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Test-Distance.value[x]:valueCodeableConcept	preferred	VS_VA_Test_Distance https://eyematics.org/fhir/eyematics-kds/ValueSet/va-test-distance from this IG
Observation.component:Optotype-used.code	example	Fixed Value: Optotype("Optotype") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Optotype-used.value[x]	preferred	VS_VA_Optotypes https://eyematics.org/fhir/eyematics-kds/ValueSet/va-optotypes from this IG
Observation.component:Myadrisis.code	example	Fixed Value: SNOMED-CT Code 37125009("Dilated pupil (finding)") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Myadrisis.value[x]	required	VS_Performed_NotPerformed https://eyematics.org/fhir/eyematics-kds/ValueSet/performed-notperformed from this IG
Observation.component:Pinhole Occluder used.code	example	Fixed Value: SNOMED-CT Code 257492003("Pinhole (physical object)") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Pinhole Occluder used.value[x]	required	VS_Used_NotUsed https://eyematics.org/fhir/eyematics-kds/ValueSet/used-notused from this IG
Observation.component:SpecialVATestingParameters.code	example	Fixed Value: SNOMED-CT Code 370115009("Special Concept") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:SpecialVATestingParameters.value[x]	preferred	VS_VA_Special_Testing_Parameters https://eyematics.org/fhir/eyematics-kds/ValueSet/va-special-testing-parameters from this IG

Constraints

Id	Grade	Path(s)	Details	Requirements
dom-2	error	Observation	If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty()
dom-3	error	Observation	If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource : contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4	error	Observation	If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated : contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5	error	Observation	If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty()
dom-6	best practice	Observation	A resource should have narrative for robust management : text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()
iop-laterality	error	Observation	Seitigkeit vom LOINC-Code und Seitigkeit von Observation.bodySite müssen übereinstimmen. : (Observation.code.coding.where(code='79893-4').exists() implies bodySite.coding.code = '1290041000') and (Observation.code.coding.where(code='79892-6').exists() implies bodySite.coding.code = '79892-6')
obs-3	error	Observation.referenceRange	Must have at least a low or a high or text : low.exists() or high.exists() or text.exists()
obs-6	error	Observation	dataAbsentReason SHALL only be present if Observation.value[x] is not present : dataAbsentReason.empty() or value.empty()
obs-7	error	Observation	If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present : value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()

Differential View

This structure is derived from MII_EyeMatics_OphtalmicObservation

Name	Flags	Card.	Type	Description & Constraints
Observation		0..*	MII_EyeMatics_OphtalmicObservation	Measurements and simple assertions
code		1..1	CodeableConcept	Type of observation (code / type) Fixed Value: As shown
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 260246004
display		1..1	string	Representation defined by the system Fixed Value: Visual Acuity finding
coding		0..*	Coding	Additional codings Binding: Visual Acuity Code (preferred)
Slices for value[x]	S	0..1		Actual result Slice: Unordered, Open by type:$this
valueQuantity			Quantity
valueCodeableConcept			CodeableConcept
valueString			string
valueRatio			Ratio
value[x]:valueRatio		0..1	Ratio	Visual acuity expressed as a Snellen fraction
value[x]:valueQuantity		0..1	Quantity	Visual acuity expressed as a simple quantity
code		0..1	code	Coded form of the unit Binding: Visual Acuity Units (preferred)
value[x]:valueCodeableConcept		0..1	CodeableConcept	Visual acuity expressed as a code Binding: Visual Acuity Categorial Values (preferred)
value[x]:valueString		0..1	string	Visual acuity expressed as a string (discouraged!)
note	S	0..*	Annotation	Free text note or Comments about the VA observation
bodySite		1..1	CodeableConcept	Observed body part Binding: Eye.Laterality (required)
method		0..1	CodeableConcept	VA measurement Method Binding: VA-Methods (preferred)
coding		0..1	Coding	Code defined by a terminology system
referenceRange		0..1	BackboneElement	Provides guide for interpretation
Slices for component		0..*	BackboneElement	Component results Slice: Unordered, Open by value:code, value:value
component:Correction-in-front-of-right-eye		0..1	BackboneElement	Component results
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url
extension:LensDuringVATestSpecification		0..1	(Complex)	Extension URL: https://larfuma.github.io/fhir-eyecare-ig/StructureDefinition/LensDuringVATestSpecification
code		1..1	CodeableConcept	Type of component observation (code / type) Fixed Value: As shown
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://loinc.org
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 29073-4
display		1..1	string	Representation defined by the system Fixed Value: Right Eye position
value[x]		0..1	CodeableConcept	Actual component result Binding: Visual Acuity Correction Methods (preferred)
component:Correction-in-front-of-left-eye		0..1	BackboneElement	Component results
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url
extension:LensDuringVATestSpecification		0..1	(Complex)	Extension URL: https://larfuma.github.io/fhir-eyecare-ig/StructureDefinition/LensDuringVATestSpecification
code		1..1	CodeableConcept	Type of component observation (code / type) Fixed Value: As shown
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://loinc.org
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 29074-2
display		1..1	string	Representation defined by the system Fixed Value: Left eye Position
value[x]		0..1	CodeableConcept	Actual component result Binding: Visual Acuity Correction Methods (preferred)
component:Test-Distance		0..1	BackboneElement	Distance of Visual acuity Test
code		1..1	CodeableConcept	Type of component observation (code / type) Fixed Value: As shown
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 252124009
display		1..1	string	Representation defined by the system Fixed Value: Test distance
Slices for value[x]		0..1		Actual component result Slice: Unordered, Open by type:$this
valueQuantity			Quantity
valueCodeableConcept			CodeableConcept
value[x]:valueCodeableConcept		0..1	CodeableConcept	Measurement Distance as Coded Concept Binding: Visual Acuity Test Distance (preferred)
component:Optotype-used		0..1	BackboneElement	Optotype used
code		1..1	CodeableConcept	Type of component observation (code / type) Fixed Value: As shown
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
code		1..1	code	Symbol in syntax defined by the system Fixed Value: Optotype
display		1..1	string	Representation defined by the system Fixed Value: Optotype
value[x]		0..1	CodeableConcept	Actual component result Binding: Visual Acuity Optotypes (preferred)
component:Myadrisis		0..1	BackboneElement	Component results
code		1..1	CodeableConcept	Type of component observation (code / type) Fixed Value: As shown
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 37125009
display		1..1	string	Representation defined by the system Fixed Value: Dilated pupil (finding)
value[x]		0..1	CodeableConcept	Actual component result Binding: Performed-NotPerformed (required)
component:Pinhole Occluder used		0..1	BackboneElement	Component results
code		1..1	CodeableConcept	Type of component observation (code / type) Fixed Value: As shown
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 257492003
display		1..1	string	Representation defined by the system Fixed Value: Pinhole (physical object)
value[x]		0..1	CodeableConcept	Actual component result Binding: Used-NotUsed (required)
component:SpecialVATestingParameters		0..*	BackboneElement	Component results
code		1..1	CodeableConcept	Type of component observation (code / type) Fixed Value: As shown
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 370115009
display		1..1	string	Representation defined by the system Fixed Value: Special Concept
value[x]		0..1	CodeableConcept	Actual component result Binding: Visual Acuity Special Testing Parameters (preferred)
Documentation for this format

Terminology Bindings (Differential)

Path	Conformance	ValueSet	URI
Observation.code.coding	preferred	VS_VA_Code https://eyematics.org/fhir/eyematics-kds/ValueSet/va-code from this IG
Observation.value[x]:valueQuantity.code	preferred	VS_VA_Quantity_Units (a valid code from Visual Acuity Units) https://eyematics.org/fhir/eyematics-kds/ValueSet/va-quantity-units from this IG
Observation.value[x]:valueCodeableConcept	preferred	VS_VA_Categorial_Values https://eyematics.org/fhir/eyematics-kds/ValueSet/va-categorial-values from this IG
Observation.bodySite	required	VS_Eye_Laterality https://eyematics.org/fhir/eyematics-kds/ValueSet/eye-laterality from this IG
Observation.method	preferred	VS_VA_Methods https://eyematics.org/fhir/eyematics-kds/ValueSet/va-methods from this IG
Observation.component:Correction-in-front-of-right-eye.value[x]	preferred	VS_VA_Correction_Method https://eyematics.org/fhir/eyematics-kds/ValueSet/va-correction-method from this IG
Observation.component:Correction-in-front-of-left-eye.value[x]	preferred	VS_VA_Correction_Method https://eyematics.org/fhir/eyematics-kds/ValueSet/va-correction-method from this IG
Observation.component:Test-Distance.value[x]:valueCodeableConcept	preferred	VS_VA_Test_Distance https://eyematics.org/fhir/eyematics-kds/ValueSet/va-test-distance from this IG
Observation.component:Optotype-used.value[x]	preferred	VS_VA_Optotypes https://eyematics.org/fhir/eyematics-kds/ValueSet/va-optotypes from this IG
Observation.component:Myadrisis.value[x]	required	VS_Performed_NotPerformed https://eyematics.org/fhir/eyematics-kds/ValueSet/performed-notperformed from this IG
Observation.component:Pinhole Occluder used.value[x]	required	VS_Used_NotUsed https://eyematics.org/fhir/eyematics-kds/ValueSet/used-notused from this IG
Observation.component:SpecialVATestingParameters.value[x]	preferred	VS_VA_Special_Testing_Parameters https://eyematics.org/fhir/eyematics-kds/ValueSet/va-special-testing-parameters from this IG

Snapshot View

Name	Flags	Card.	Type	Description & Constraints
Observation	C	0..*	MII_EyeMatics_OphtalmicObservation	Measurements and simple assertions obs-6: dataAbsentReason SHALL only be present if Observation.value[x] is not present obs-7: If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present iop-laterality: Seitigkeit vom LOINC-Code und Seitigkeit von Observation.bodySite müssen übereinstimmen.
id	Σ	0..1	id	Logical id of this artifact
meta	Σ	0..1	Meta	Metadata about the resource
implicitRules	?!Σ	0..1	uri	A set of rules under which this content was created
language		0..1	code	Language of the resource content Binding: CommonLanguages (preferred): A human language. Additional Bindings Purpose AllLanguages Max Binding
text		0..1	Narrative	Text summary of the resource, for human interpretation
contained		0..*	Resource	Contained, inline Resources
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!	0..*	Extension	Extensions that cannot be ignored
identifier	Σ	0..*	Identifier	Business Identifier for observation
basedOn	Σ	0..*	Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest)	Fulfills plan, proposal or order
partOf	Σ	0..*	Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy)	Part of referenced event
status	?!Σ	1..1	code	registered | preliminary | final | amended + Binding: ObservationStatus (required): Codes providing the status of an observation.
Slices for category	S	1..*	CodeableConcept	Classification of type of observation Slice: Unordered, Open by pattern:$this Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories.
category:exam	S	1..1	CodeableConcept	Classification of type of observation Binding: ObservationCategoryCodes (preferred): Codes for high level observation categories. Required Pattern: At least the following
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
coding		1..*	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://terminology.hl7.org/CodeSystem/observation-category
version		0..1	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: exam
display		0..1	string	Representation defined by the system
userSelected		0..1	boolean	If this coding was chosen directly by the user
text		0..1	string	Plain text representation of the concept
code	Σ	1..1	CodeableConcept	Type of observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 260246004
display		1..1	string	Representation defined by the system Fixed Value: Visual Acuity finding
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
coding	Σ	0..*	Coding	Additional codings Binding: Visual Acuity Code (preferred)
text	Σ	0..1	string	Plain text representation of the concept
subject	SΣ	1..1	Reference(Patient)	Who and/or what the observation is about
focus	Σ	0..*	Reference(Resource)	What the observation is about, when it is not about the subject of record
encounter	Σ	0..1	Reference(Encounter)	Healthcare event during which this observation is made
effective[x]	Σ	0..1		Clinically relevant time/time-period for observation
effectiveDateTime			dateTime
effectivePeriod			Period
effectiveTiming			Timing
effectiveInstant			instant
issued	Σ	0..1	instant	Date/Time this version was made available
performer	Σ	0..*	Reference(Practitioner | PractitionerRole | Organization | CareTeam | Patient | RelatedPerson)	Who is responsible for the observation
Slices for value[x]	SΣC	0..1		Actual result Slice: Unordered, Closed by type:$this
valueQuantity			Quantity
valueCodeableConcept			CodeableConcept
valueString			string
valueRatio			Ratio
value[x]:valueRatio	ΣC	0..1	Ratio	Visual acuity expressed as a Snellen fraction
value[x]:valueQuantity	ΣC	0..1	Quantity	Visual acuity expressed as a simple quantity
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
value	Σ	0..1	decimal	Numerical value (with implicit precision)
comparator	?!Σ	0..1	code	< | <= | >= | > - how to understand the value Binding: QuantityComparator (required): How the Quantity should be understood and represented.
unit	Σ	0..1	string	Unit representation
system	ΣC	0..1	uri	System that defines coded unit form
code	Σ	0..1	code	Coded form of the unit Binding: Visual Acuity Units (preferred)
value[x]:valueCodeableConcept	ΣC	0..1	CodeableConcept	Visual acuity expressed as a code Binding: Visual Acuity Categorial Values (preferred)
value[x]:valueString	ΣC	0..1	string	Visual acuity expressed as a string (discouraged!)
dataAbsentReason	C	0..1	CodeableConcept	Why the result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
note	S	0..*	Annotation	Free text note or Comments about the VA observation
bodySite	S	1..1	CodeableConcept	Observed body part Binding: Eye.Laterality (required)
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
Slices for coding	Σ	1..*	Coding	Code defined by a terminology system Slice: Unordered, Open by pattern:$this
coding:laterality	SΣ	1..1	Coding	Code defined by a terminology system Binding: Eye.Laterality (required)
text	Σ	0..1	string	Plain text representation of the concept
method		0..1	CodeableConcept	VA measurement Method Binding: VA-Methods (preferred)
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
coding	Σ	0..1	Coding	Code defined by a terminology system
text	Σ	0..1	string	Plain text representation of the concept
specimen		0..1	Reference(Specimen)	Specimen used for this observation
device		0..1	Reference(Device | DeviceMetric)	(Measurement) Device
referenceRange	C	0..1	BackboneElement	Provides guide for interpretation obs-3: Must have at least a low or a high or text
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
low	C	0..1	SimpleQuantity	Low Range, if relevant
high	C	0..1	SimpleQuantity	High Range, if relevant
type		0..1	CodeableConcept	Reference range qualifier Binding: ObservationReferenceRangeMeaningCodes (preferred): Code for the meaning of a reference range.
appliesTo		0..*	CodeableConcept	Reference range population Binding: ObservationReferenceRangeAppliesToCodes (example): Codes identifying the population the reference range applies to.
age		0..1	Range	Applicable age range, if relevant
text		0..1	string	Text based reference range in an observation
hasMember	Σ	0..*	Reference(Observation | QuestionnaireResponse | MolecularSequence)	Related resource that belongs to the Observation group
derivedFrom	Σ	0..*	Reference(DocumentReference | ImagingStudy | Media | QuestionnaireResponse | Observation | MolecularSequence)	Related measurements the observation is made from
Slices for component	Σ	0..*	BackboneElement	Component results Slice: Unordered, Open by value:code, value:value
component:All Slices				Content/Rules for all slices
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations.
value[x]	Σ	0..1		Actual component result
valueQuantity			Quantity
valueCodeableConcept			CodeableConcept
valueString			string
valueBoolean			boolean
valueInteger			integer
valueRange			Range
valueRatio			Ratio
valueSampledData			SampledData
valueTime			time
valueDateTime			dateTime
valuePeriod			Period
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
component:Correction-in-front-of-right-eye	Σ	0..1	BackboneElement	Component results
id		0..1	string	Unique id for inter-element referencing
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url
extension:LensDuringVATestSpecification		0..1	(Complex)	Extension URL: https://larfuma.github.io/fhir-eyecare-ig/StructureDefinition/LensDuringVATestSpecification
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://loinc.org
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 29073-4
display		1..1	string	Representation defined by the system Fixed Value: Right Eye position
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Visual Acuity Correction Methods (preferred)
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
component:Correction-in-front-of-left-eye	Σ	0..1	BackboneElement	Component results
id		0..1	string	Unique id for inter-element referencing
Slices for extension		0..*	Extension	Extension Slice: Unordered, Open by value:url
extension:LensDuringVATestSpecification		0..1	(Complex)	Extension URL: https://larfuma.github.io/fhir-eyecare-ig/StructureDefinition/LensDuringVATestSpecification
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://loinc.org
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 29074-2
display		1..1	string	Representation defined by the system Fixed Value: Left eye Position
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Visual Acuity Correction Methods (preferred)
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
component:Test-Distance	Σ	0..1	BackboneElement	Distance of Visual acuity Test
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 252124009
display		1..1	string	Representation defined by the system Fixed Value: Test distance
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
Slices for value[x]	Σ	0..1		Actual component result Slice: Unordered, Open by type:$this
valueQuantity			Quantity
valueCodeableConcept			CodeableConcept
value[x]:valueCodeableConcept	Σ	0..1	CodeableConcept	Measurement Distance as Coded Concept Binding: Visual Acuity Test Distance (preferred)
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
component:Optotype-used	Σ	0..1	BackboneElement	Optotype used
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		0..0	uri	Identity of the terminology system
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: Optotype
display		1..1	string	Representation defined by the system Fixed Value: Optotype
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Visual Acuity Optotypes (preferred)
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
component:Myadrisis	Σ	0..1	BackboneElement	Component results
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 37125009
display		1..1	string	Representation defined by the system Fixed Value: Dilated pupil (finding)
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Performed-NotPerformed (required)
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
component:Pinhole Occluder used	Σ	0..1	BackboneElement	Component results
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 257492003
display		1..1	string	Representation defined by the system Fixed Value: Pinhole (physical object)
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Used-NotUsed (required)
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
component:SpecialVATestingParameters	Σ	0..*	BackboneElement	Component results
id		0..1	string	Unique id for inter-element referencing
extension		0..*	Extension	Additional content defined by implementations
modifierExtension	?!Σ	0..*	Extension	Extensions that cannot be ignored even if unrecognized
code	Σ	1..1	CodeableConcept	Type of component observation (code / type) Binding: LOINCCodes (example): Codes identifying names of simple observations. Fixed Value: As shown
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
coding		1..1	Coding	Code defined by a terminology system Fixed Value: (complex)
id		0..0	string	Unique id for inter-element referencing
extension		0..0	Extension	Additional content defined by implementations
system		1..1	uri	Identity of the terminology system Fixed Value: http://snomed.info/sct
version		0..0	string	Version of the system - if relevant
code		1..1	code	Symbol in syntax defined by the system Fixed Value: 370115009
display		1..1	string	Representation defined by the system Fixed Value: Special Concept
userSelected		0..0	boolean	If this coding was chosen directly by the user
text		0..0	string	Plain text representation of the concept
value[x]	Σ	0..1	CodeableConcept	Actual component result Binding: Visual Acuity Special Testing Parameters (preferred)
dataAbsentReason	C	0..1	CodeableConcept	Why the component result is missing Binding: DataAbsentReason (extensible): Codes specifying why the result (Observation.value[x]) is missing.
interpretation		0..*	CodeableConcept	High, low, normal, etc. Binding: ObservationInterpretationCodes (extensible): Codes identifying interpretations of observations.
referenceRange		0..*	See referenceRange (Observation)	Provides guide for interpretation of component result
Documentation for this format

Terminology Bindings

Path	Conformance	ValueSet / Code	URI
Observation.language	preferred	CommonLanguages http://hl7.org/fhir/ValueSet/languages from the FHIR Standard Additional Bindings Purpose AllLanguages Max Binding
Observation.status	required	ObservationStatus http://hl7.org/fhir/ValueSet/observation-status|4.0.1 from the FHIR Standard
Observation.category	preferred	ObservationCategoryCodes http://hl7.org/fhir/ValueSet/observation-category from the FHIR Standard
Observation.category:exam	preferred	Pattern: exam http://hl7.org/fhir/ValueSet/observation-category from the FHIR Standard
Observation.code	example	Fixed Value: SNOMED-CT Code 260246004("Visual Acuity finding") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.code.coding	preferred	VS_VA_Code https://eyematics.org/fhir/eyematics-kds/ValueSet/va-code from this IG
Observation.value[x]:valueQuantity.comparator	required	QuantityComparator http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1 from the FHIR Standard
Observation.value[x]:valueQuantity.code	preferred	VS_VA_Quantity_Units (a valid code from Visual Acuity Units) https://eyematics.org/fhir/eyematics-kds/ValueSet/va-quantity-units from this IG
Observation.value[x]:valueCodeableConcept	preferred	VS_VA_Categorial_Values https://eyematics.org/fhir/eyematics-kds/ValueSet/va-categorial-values from this IG
Observation.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.bodySite	required	VS_Eye_Laterality https://eyematics.org/fhir/eyematics-kds/ValueSet/eye-laterality from this IG
Observation.bodySite.coding:laterality	required	VS_Eye_Laterality https://eyematics.org/fhir/eyematics-kds/ValueSet/eye-laterality from this IG
Observation.method	preferred	VS_VA_Methods https://eyematics.org/fhir/eyematics-kds/ValueSet/va-methods from this IG
Observation.referenceRange.type	preferred	ObservationReferenceRangeMeaningCodes http://hl7.org/fhir/ValueSet/referencerange-meaning from the FHIR Standard
Observation.referenceRange.appliesTo	example	ObservationReferenceRangeAppliesToCodes http://hl7.org/fhir/ValueSet/referencerange-appliesto from the FHIR Standard
Observation.component.code	example	LOINCCodes (a valid code from LOINC) http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:Correction-in-front-of-right-eye.code	example	Fixed Value: LOINC Code 29073-4("Right Eye position") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Correction-in-front-of-right-eye.value[x]	preferred	VS_VA_Correction_Method https://eyematics.org/fhir/eyematics-kds/ValueSet/va-correction-method from this IG
Observation.component:Correction-in-front-of-right-eye.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:Correction-in-front-of-right-eye.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:Correction-in-front-of-left-eye.code	example	Fixed Value: LOINC Code 29074-2("Left eye Position") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Correction-in-front-of-left-eye.value[x]	preferred	VS_VA_Correction_Method https://eyematics.org/fhir/eyematics-kds/ValueSet/va-correction-method from this IG
Observation.component:Correction-in-front-of-left-eye.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:Correction-in-front-of-left-eye.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:Test-Distance.code	example	Fixed Value: SNOMED-CT Code 252124009("Test distance") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Test-Distance.value[x]:valueCodeableConcept	preferred	VS_VA_Test_Distance https://eyematics.org/fhir/eyematics-kds/ValueSet/va-test-distance from this IG
Observation.component:Test-Distance.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:Test-Distance.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:Optotype-used.code	example	Fixed Value: Optotype("Optotype") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Optotype-used.value[x]	preferred	VS_VA_Optotypes https://eyematics.org/fhir/eyematics-kds/ValueSet/va-optotypes from this IG
Observation.component:Optotype-used.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:Optotype-used.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:Myadrisis.code	example	Fixed Value: SNOMED-CT Code 37125009("Dilated pupil (finding)") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Myadrisis.value[x]	required	VS_Performed_NotPerformed https://eyematics.org/fhir/eyematics-kds/ValueSet/performed-notperformed from this IG
Observation.component:Myadrisis.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:Myadrisis.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:Pinhole Occluder used.code	example	Fixed Value: SNOMED-CT Code 257492003("Pinhole (physical object)") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:Pinhole Occluder used.value[x]	required	VS_Used_NotUsed https://eyematics.org/fhir/eyematics-kds/ValueSet/used-notused from this IG
Observation.component:Pinhole Occluder used.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:Pinhole Occluder used.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard
Observation.component:SpecialVATestingParameters.code	example	Fixed Value: SNOMED-CT Code 370115009("Special Concept") http://hl7.org/fhir/ValueSet/observation-codes from the FHIR Standard
Observation.component:SpecialVATestingParameters.value[x]	preferred	VS_VA_Special_Testing_Parameters https://eyematics.org/fhir/eyematics-kds/ValueSet/va-special-testing-parameters from this IG
Observation.component:SpecialVATestingParameters.dataAbsentReason	extensible	DataAbsentReason http://hl7.org/fhir/ValueSet/data-absent-reason from the FHIR Standard
Observation.component:SpecialVATestingParameters.interpretation	extensible	ObservationInterpretationCodes http://hl7.org/fhir/ValueSet/observation-interpretation from the FHIR Standard

Constraints

Id	Grade	Path(s)	Details	Requirements
dom-2	error	Observation	If the resource is contained in another resource, it SHALL NOT contain nested Resources : contained.contained.empty()
dom-3	error	Observation	If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource : contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()
dom-4	error	Observation	If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated : contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()
dom-5	error	Observation	If a resource is contained in another resource, it SHALL NOT have a security label : contained.meta.security.empty()
dom-6	best practice	Observation	A resource should have narrative for robust management : text.`div`.exists()
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children : hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both : extension.exists() != value.exists()
iop-laterality	error	Observation	Seitigkeit vom LOINC-Code und Seitigkeit von Observation.bodySite müssen übereinstimmen. : (Observation.code.coding.where(code='79893-4').exists() implies bodySite.coding.code = '1290041000') and (Observation.code.coding.where(code='79892-6').exists() implies bodySite.coding.code = '79892-6')
obs-3	error	Observation.referenceRange	Must have at least a low or a high or text : low.exists() or high.exists() or text.exists()
obs-6	error	Observation	dataAbsentReason SHALL only be present if Observation.value[x] is not present : dataAbsentReason.empty() or value.empty()
obs-7	error	Observation	If Observation.code is the same as an Observation.component.code then the value element associated with the code SHALL NOT be present : value.empty() or component.code.where(coding.intersect(%resource.code.coding).exists()).empty()

This structure is derived from MII_EyeMatics_OphtalmicObservation

Summary

Mandatory: 1 element
Must-Support: 2 elements
Fixed: 8 elements

Extensions

This structure refers to these extensions:

• https://larfuma.github.io/fhir-eyecare-ig/StructureDefinition/LensDuringVATestSpecification

Slices

This structure defines the following Slices:

• The element 1 is sliced based on the value of Observation.value[x]
• The element 2 is sliced based on the values of Observation.component
• The element 1 is sliced based on the value of Observation.component.value[x]