ARCHETYPE Visual acuity test (openEHR-EHR-OBSERVATION.visual_acuity.v0)

ARCHETYPE IDopenEHR-EHR-OBSERVATION.visual_acuity.v0
ConceptVisual acuity test
DescriptionA test to quantify an individual's ability to resolve small objects as a measure of the clarity or sharpness of vision.
UseUse to record a signle measurement of visual acuity. The `Position in front of Eye` cluster allows for flexible combination of device types (such as a pinhole occluder, own glasses, fogging lenses, trial lenses etc.) to be modelled, and the lens specification cluster allows individual lenses or an arrangement of trial lenses to be specified. This way, the archetype can be used to describe VA test with multiple corrective devices in front of the same eye (contact lens overrefraction) or binocular VA test with different corrections in front of each eye. (unilateral hard contact lens due to corneal scar). The `Type of Correction` Element contains the information whether a correction is present, which type of correction was present, and where the values of that correction come from. Pupil dilation can be specified using the "Confounding factors" element, which is especially relevant to transient pupil dilation due to eye drops.
MisuseNot to be used to document multiple visual acuity tests within one event. The "Result" Cluster is not to be used to document the same visual acuity test in multiple units - only a unique result is to be documented there. If the same test result is to be expressed with multiple units, only use the result cluster once, and the "derived result" cluster for all others. Not to be used for assessing the light projection in individual quadrants, because that is an assessment of the visual field rather than acuity.
PurposeFor recording the results of one single visual acuity examination per event. This is normally measured by testing the Individual's ability to recognize symbols at a defined distance using either the right, left or both eyes.
ReferencesVisual Acuity [Internet]. Wikipedia. Available from: http://en.wikipedia.org/wiki/Visual_acuity

Aylward W [Internet].Coding Visual Acuity, openEyes Project;2012.Available from http://www.openeyes.org.uk/documents/OpenEyes%20Coding%20Visual%20Acuity.pdf

IHE Eye Care Domain. General Eye Evaluation (GEE) [Internet]. IHE; 2012. Available from: http://www.ihe.net/Technical_Framework/upload/IHE_EyeCare_Supp_GEE_Rev1-1_TI_2012-06-29.pdf

Royal College of Opthalmologists. Cataract National Dataset for Adults [Internet]. 2011. Available from: http://www.rcophth.ac.uk/page.asp?section=583&sectionTitle=Cataract+National+Data+Set+for+Adults

Laidlaw D a. H, Tailor V, Shah N, Atamian S, Harcourt C. Validation of a computerised logMAR visual acuity measurement system (COMPlog): comparison with ETDRS and the electronic ETDRS testing algorithm in adults and amblyopic children. Br J Ophthalmol [Internet]. 2008 Feb 1 [cited 2012 Sep 26];92(2):241–4. Available from: http://bjo.bmj.com/content/92/2/241

CfH, UK. Do Once & Share - Glaucoma [Internet]. [cited 2012 Sep 26]. Available from: http://www.doasglaucoma.org/

DICOM Supplement 30 [Internet]. [cited 2012 Sep 26]. Available from: http://medical.nema.org/

Chiang MF, Boland MV, Brewer A, Epley KD, Horton MB, Lim MC, et al. Special Requirements for Electronic Health Record Systems in Ophthalmology. Ophthalmology [Internet]. 2011 Aug [cited 2012 Sep 26];118(8):1681–7. Available from: http://www.aaojournal.org/article/S0161-6420(11)00374-5/abstract

Practical Ophthalmology: A Manual for Beginning Residents, 6th Edition [Paperback]
American Academy Of Ophthalmology (Author), Fred M. Wilson II (Editor), MD (Editor)
Copyright© openEHR Foundation
AuthorsAuthor name: Ian McNicoll
Organisation: Ocean Informatics, UK
Email: ian.mcnicoll@oceaninformatics.com
Date originally authored: 2012-07-18
Other Details LanguageAuthor name: Ian McNicoll
Organisation: Ocean Informatics, UK
Email: ian.mcnicoll@oceaninformatics.com
Date originally authored: 2012-07-18
OtherDetails Language Independent{licence=This work is licensed under the Creative Commons Attribution-ShareAlike 3.0 License. To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/3.0/., custodian_organisation=openEHR Foundation, references=Visual Acuity [Internet]. Wikipedia. Available from: http://en.wikipedia.org/wiki/Visual_acuity Aylward W [Internet].Coding Visual Acuity, openEyes Project;2012.Available from http://www.openeyes.org.uk/documents/OpenEyes%20Coding%20Visual%20Acuity.pdf IHE Eye Care Domain. General Eye Evaluation (GEE) [Internet]. IHE; 2012. Available from: http://www.ihe.net/Technical_Framework/upload/IHE_EyeCare_Supp_GEE_Rev1-1_TI_2012-06-29.pdf Royal College of Opthalmologists. Cataract National Dataset for Adults [Internet]. 2011. Available from: http://www.rcophth.ac.uk/page.asp?section=583§ionTitle=Cataract+National+Data+Set+for+Adults Laidlaw D a. H, Tailor V, Shah N, Atamian S, Harcourt C. Validation of a computerised logMAR visual acuity measurement system (COMPlog): comparison with ETDRS and the electronic ETDRS testing algorithm in adults and amblyopic children. Br J Ophthalmol [Internet]. 2008 Feb 1 [cited 2012 Sep 26];92(2):241–4. Available from: http://bjo.bmj.com/content/92/2/241 CfH, UK. Do Once & Share - Glaucoma [Internet]. [cited 2012 Sep 26]. Available from: http://www.doasglaucoma.org/ DICOM Supplement 30 [Internet]. [cited 2012 Sep 26]. Available from: http://medical.nema.org/ Chiang MF, Boland MV, Brewer A, Epley KD, Horton MB, Lim MC, et al. Special Requirements for Electronic Health Record Systems in Ophthalmology. Ophthalmology [Internet]. 2011 Aug [cited 2012 Sep 26];118(8):1681–7. Available from: http://www.aaojournal.org/article/S0161-6420(11)00374-5/abstract Practical Ophthalmology: A Manual for Beginning Residents, 6th Edition [Paperback] American Academy Of Ophthalmology (Author), Fred M. Wilson II (Editor), MD (Editor), original_namespace=org.openehr, original_publisher=openEHR Foundation, custodian_namespace=org.openehr, MD5-CAM-1.0.1=89D95236B8367385B1F424F754851E7B, build_uid=b70e877e-cabd-46ad-82e6-45107ee3b2f9, ip_acknowledgements=This artefact includes content from SNOMED Clinical Terms® (SNOMED CT®) which is copyrighted material of the International Health Terminology Standards Development Organisation (IHTSDO). Where an implementation of this artefact makes use of SNOMED CT content, the implementer must have the appropriate SNOMED CT Affiliate license - for more information contact https://www.snomed.org/snomed-ct/get-snomed or info@snomed.org., revision=0.0.1-alpha}
Keywordseye, sight, vision, ophthalmic, visual, refraction
Lifecyclein_development
UID93b051f7-c9a6-4728-92aa-13a3af7114d5
Language useden
Citeable Identifier1013.1.7723
Revision Number0.0.1-alpha
AllArchetype [runtimeNameConstraintForConceptName=null, archetypeConceptBinding=null, archetypeConceptDescription=A test to quantify an individual's ability to resolve small objects as a measure of the clarity or sharpness of vision., archetypeConceptComment=null, otherContributors=Silje Ljosland Bakke, Norway
Severin Kohler, Germany
Lars Fuhrmann, Germany
Bill Aylward, openEyes Project, UK
Gustavo Bacelar-Silva, Brazil (Editor)
Stephen Chu, NeHTA, Australia
Alistair Laidlaw, Guys and St Thomas NHS Trust, UK
Heather Leslie, Ocean Informatics, Australia
Gustavo M Bacelar-Silva, Brazil
Mike Mair, Timaru Eye Clinic, New Zealand
Ian McNicoll, Ocean Informatics, United Kingdom (Editor), originalLanguage=en, translators=
  • Norwegian Bokmål: Ingrid Heitmann, Arne Løberg Sæter, Oslo universitetssykehus HF, iheitman@ous-hf.no, arnelsa@gmail.com
  • Spanish (Chile): Poblete Francisco, DuocUC, openehrfpoblete@gmail.com, .
, subjectOfData=unconstrained, archetypeTranslationTree=null, topLevelToAshis={other_participations=[], details=[], description=[], capabilities=[], protocol=[ResourceSimplifiedHierarchyItem [path=/protocol[at0020]/items[at0363], code=at0363, itemType=ELEMENT, level=2, text=Best corrected visual acuity definition, description=The definition of BCVA that applies to the comparative classification element, comment=Ideally, this would include a description of the process how the lens powers of the best correction are determined. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_TEXT, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/protocol[at0020]/items[at0365], code=at0365, itemType=ELEMENT, level=2, text=Best recorded visual acuity definition, description=The definition of BRVA that applies to the comparative classification element. , comment=This is typically a rectrospective comparison of visual acuity measures of the same eye on the same day or the same encounter. Ideally, this would include a description of the the comparison is performed. Specifically, whether measurements aided by pinhole occluder were excluded or not. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_TEXT, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/protocol[at0020]/items[at0332], code=at0332, itemType=ELEMENT, level=2, text=Description of derived results calculation, description=A text description used to describe the manner in which the derived results were determined., comment=null, uncommonOntologyItems=null, occurencesFormal=0..*, occurencesText=Optional, repeating, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_TEXT, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/protocol[at0020]/items[at0022], code=at0022, itemType=ELEMENT, level=2, text=Chart scoring algorithm, description=The alogrithm used to determine the score., comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_CODED_TEXT, bindings=null, values=
  • Single letter [A single letter algorithm was used to derive the visual acuity score.]
  • Whole line [A whole line algorithm was used to derive the visual acuity score.]
  • Last line single letter [A last line single letter algorithm was used to derive the visual acuity score.]
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/protocol[at0020]/items[at0244], code=at0244, itemType=ELEMENT, level=2, text=Background luminance, description=This should be Candela Per Square meter., comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_QUANTITY, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/protocol[at0020]/items[at0256], code=at0256, itemType=ELEMENT, level=2, text=Ambient lighting, description=The ambient lighting in the room where the visual acuity testing ist taking place., comment=May be described either as Illuminance or Luminance., uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=CHOICE, bindings=null, values=Choice of:
  •  Quantity
    Property: Illuminance
    Units: lx
  •  Coded Text
    • Photopic [Bright or Daylight conditions, where cone function dominates.]
    • Mesopic [Twilight conditions, where both rods and cones are active.]
    • Scotopic [Dark Conditions, where rod function dominates.]
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/protocol[at0020]/items[at0025], code=at0025, itemType=SLOT, level=2, text=Stimulus device details, description=Details of the devices used provide a stimulus to be resolved by the eye being tested, such as a chart, projector or digital display., comment=null, uncommonOntologyItems=null, occurencesFormal=0..*, occurencesText=Optional, repeating, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=CLUSTER, bindings=null, values=Include:
openEHR-EHR-CLUSTER.device.v1 and specialisations, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/protocol[at0020]/items[at0143], code=at0143, itemType=SLOT, level=2, text=Extension, description=Additional information required to capture local content or to align with other reference models/formalisms., comment=For example: local information requirements or additional metadata to align with FHIR or CIMI equivalents., uncommonOntologyItems=null, occurencesFormal=0..*, occurencesText=Optional, repeating, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=CLUSTER, bindings=null, values=Include:
All not explicitly excluded archetypes, extendedValues=null]], relationships=[], items=[], activities=[], credentials=[], ism_transition=[], content=[], source=[], identities=[], provider=[], events=[ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134], code=at0134, itemType=POINT_EVENT, level=2, text=Any event, description=Default, unspecified point in time or interval event which may be explicitly defined in a template or at run-time., comment=null, uncommonOntologyItems=null, occurencesFormal=0..*, occurencesText=Optional, repeating, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=POINT_EVENT, bindings=null, values=null, extendedValues=null]], state=[ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0081], code=at0081, itemType=ELEMENT, level=4, text=Testing distance category, description=An ordinal measure of testing distance, comment=Ideally to be used in conjunction with the quantitative element for testing distance. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_CODED_TEXT, bindings=[SNOMED-CT::252124009 | Test distance], values=
  • Near [The test was performed at near distance, which typically refers to a distance below 50cm. There is no generally agreed cutoff.]
  • Intermediate [The test was performed at intermediate distance, which typically refers to distances between 50cm and 2 Meters. There are no generally agreed cutoffs.]
  • Far [The test was performed at far distance, which typically refers to distances at or above 4 meters, without a generally accepted cutoff.]
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0412], code=at0412, itemType=ELEMENT, level=4, text=Testing distance, description=The distance at which the subject's visual acuity was measured., comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_QUANTITY, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0226], code=at0226, itemType=ELEMENT, level=4, text=General method, description=A general categorization of testing methods., comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_CODED_TEXT, bindings=null, values=
  • Laser Interferometer [A laser interferometer device was used to estimate potential visual acuity.]
  • Near Card [A card that is typically held a reading distance, may depict optotoypes or segments of text.]
  • Guyton and Minkowski Potential Acuity Meter [A device used to estimate potential visual acuity.]
  • Handheld Retinometer [A handheld device used to estimate potential visual acuity.]
  • Visual acuity chart [A chart, which may be a printed physical objected, projected or digitally displayed, typically depicts optotypes.]
  • Preferential looking test [A test based on an infants tendency to fixate high-contrast gratings.]
  • Optokinetic nystagmus test [A test based on the patient's ability to follow objects in motion.]
  • Visual evoked potential [A test to estimate the Visual acuity based on the visual evoked potentials at different spacial frequencies.]
  • Cardiff Acuity Test [A Test based on the principle of vanishing optotypes.]
  • Electronic visual acuity testing [Automated VA testing, typically used for research.]
  • Near reading card [A near card with segments of text that are read by the patient.]
  • Near card with optotypes [A near card depicting optotypes similar to a typical visual acuity chart.]
  • Refractometer-integrated test [The stimulus is displayed in a refractometer device.]
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0023], code=at0023, itemType=ELEMENT, level=4, text=Chart or card type, description=The specific chart or card method used to measure visual acuity., comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_CODED_TEXT, bindings=null, values=
  • logMar chart [A logMar chart was used to measure visual acuity.]
  • Snellen chart [A Snellen chart was used to measure visual acuity.]
    [SNOMED-CT::400913005 | Snellen chart]
  • ETDRS chart [An ETDRS chart was used to measure visual acuity.]
    [SNOMED-CT::400914004 | ETDRS visual acuity chart]
  • ETDRS Original Series Chart 1 [An ETDRS Original Series Chart 1 was used to measure acuity.]
  • ETDRS Original Series Chart 2 [An ETDRS Original Series Chart 2 was used to measure acuity.]
  • ETDRS Original Series Chart R [An ETDRS Original Series Chart R was used to measure acuity.]
    [SNOMED-CT::422673001 | Snellen visual acuity]
  • ETDRS Revised Series Chart 1 [An ETDRS Revised Series Chart 1 was used to measure visual acuity.]
  • ETDRS Revised Series Chart 2 [An ETDRS Revised Series Chart 2 was used to measure visual acuity.]
  • ETDRS Revised Series Chart 3 [An ETDRS Revised Series Chart 3 was used to measure visual acuity.]
  • Golovin-Sitsev table [A Golovin-Sitsev table was used to measure visual acuity.]
  • Monoyer Visual Acuity chart [A Monoyer Visual Acuity chart was used to measure visual acuity.]
  • Cardiff Acuity Cards [Cardiff Acuity Cards were used to measure visual acuity.]
  • Keeler Acuity Cards [Keeler Acuity Cards were used to measure visual acuity.]
  • Teller Acuity Cards [Teller Acuity Cards were used to measure visual acuity.]
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0021], code=at0021, itemType=ELEMENT, level=4, text=Optotype, description=The type of visual acuity chart symbol used to assess visual acuity., comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_CODED_TEXT, bindings=null, values=
  • Pictogramm [Picture optotypes were used.]
  • Orientation-Type Optotypes [Orientation-Type optotypes were used.]
  • Letters [Letter optotypes were used.]
  • Lea Symbol [Lea Symbol optotypes were used.]
  • Kay Picture [Kay Picture optotypes were used.]
  • Allen Picture [Allen Picture optotypes were used.]
  • Auckland [Auckland optotypes were used.]
  • Amsterdam Picture [Amsterdam Picture optotypes were used.]
  • Landolt C [Landolt C optotypes were used.]
  • Tumbling E [Tumbling E optotypes were used.]
  • Numbers [Number optotypes were used.]
  • Precision Vision Numbers [Precision Vision Number optotypes were used.]
  • Lea Numbers [Lea Number optotypes were used.]
  • Sloan Letters [Sloan Letter optotypes were used.]
  • Cyrillic Letters [Cyrillic Letter optotypes were used.]
  • Snellen Letters [Snellen Letter optotypes were used.]
  • HOTV Letters [HOTV Letter optotypes were used.]
  • LRVC Letters [LRVC Letter optotypes were used.]
  • British Letters (2003) [British Letter (2003) optotypes were used.]
  • European-Wide Letters [European-Wide Letter optotypes were used.]
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0252], code=at0252, itemType=ELEMENT, level=4, text=Optotype presentation modifiers, description=Modifications of how optotypes are displayed, comment=Differentiating crowded from uncrowded optotypes is especially relevant in children and those with a suspicion of Amblyopia., uncommonOntologyItems=null, occurencesFormal=0..*, occurencesText=Optional, repeating, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_CODED_TEXT, bindings=null, values=
  • Single Optotype Presentation [A single optotype at a time was displayed.]
  • Crowded Optotype Presentation [Crowded ptotypes were displayed.]
  • Line Optotype Presentation [A whole line of optotypes of the same size were displayed at the same time.]
  • Uncrowded Optotype Presentation [Uncrowded optotypes were displayed.]
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0247], code=at0247, itemType=CLUSTER, level=4, text=Contrast, description=, comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=1..*, cardinalityText=, subCardinalityFormal=null, subCardinalityText=null, dataType=CLUSTER, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0247]/items[at0245], code=at0245, itemType=ELEMENT, level=5, text=Weber contrast, description=, comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_PROPORTION, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0247]/items[at0248], code=at0248, itemType=ELEMENT, level=5, text=Michelson contrast, description=, comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_PROPORTION, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0247]/items[at0249], code=at0249, itemType=ELEMENT, level=5, text=RMS contrast, description=, comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_PROPORTION, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0392], code=at0392, itemType=ELEMENT, level=4, text=Type of ancillary lighting method, description=Additional light sources used in addition to the typical room, stimulus or chart lighting. , comment=This does not include the room lighting and the typical lighting of the stimulus. Optotype Projectors, Digital Chart Displays and Lightboxes all contain light sources, but these are not considered "ancillary". , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_CODED_TEXT, bindings=null, values=
  • Glare Light [A light source was directed at the eye to induce glare.]
  • Brightness Acuity Test [A handheld Ganzfeld illumination device was used to simulate environmental brightness.]
  • None [No ancillary lighting was used.]
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0393], code=at0393, itemType=ELEMENT, level=4, text=Ancillary lighting intensity setting, description=The light intensity setting of the ancillary lighting source, comment=This does not refer to a physical measure of light intensity, but rather the setting used to produce it, which may be on an arbitratry scale specific to the device used. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=CHOICE, bindings=null, values=Choice of:
  •  Quantity
    Property: null
    Units: arb. unit
  •  Coded Text
    • Low
    • Medium
    • High
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0395], code=at0395, itemType=SLOT, level=4, text=Ancillary lighting device details, description=Details of the devices used for ancillary lighting., comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=CLUSTER, bindings=null, values=Include:
openEHR-EHR-CLUSTER.device.v1 and specialisations, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0262], code=at0262, itemType=CLUSTER, level=4, text=Aided by, description=A cluster describing what type of visual aid was used during the test, its lens specification device details and which eye it was in front of. , comment=null, uncommonOntologyItems=null, occurencesFormal=0..*, occurencesText=Optional, repeating, cardinalityFormal=1..*, cardinalityText=, subCardinalityFormal=null, subCardinalityText=null, dataType=CLUSTER, bindings=[LOINC::29073-4 | Right eye Position], values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0262]/items[at0373], code=at0373, itemType=ELEMENT, level=5, text=Type of device, description=The type of lens or object that is positioned in front of one of the eyes. , comment=Which eye it is in front of depends on the value of the "In front of which eye" element. Note that this is not exclusive of devices that are not corrective, such as defocus or fogging lenses. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_CODED_TEXT, bindings=null, values=
  • Autorefraction-based lenses [Lenses with values based on an autorefraction test.]
  • Subjective Refraction-based lenses [Lenses with values based on a subjective refraction.]
  • Own Glasses [The corrective lens values are those of the currently owned glasses.]
  • Hard Contact Lens [A hard contact lens.]
  • Soft Contact Lens [A soft contact lens.]
  • Subjective Refraction without cycloplegia-based lenses [Lenses with values based on a subjective refraction without cycloplegia.]
  • Subjective Refraction with cycloplegia-based Trial Lenses [Lenses with values based on a subjective refraction with cycloplegia.]
  • Retinoscopy based lenses [Lenses with values based on retinoscopy.]
    [SNOMED-CT::726675003 | Structure of left eye region]
  • Corrected [Lenses without a specific origin of the values were used.]
    [SNOMED-CT::726680007 | Structure of right eye region]
  • Fogging lens [A Lens used to intentionally blur the vision in that eye.]
    [SNOMED-CT::362508001 | Both eyes, entire]
  • Pinhole Occluder [A pinhole occluder was used which is a device with small holes that act as apertures. Sometimes used together with lenses.]
  • Subjective Overrefraction-based Lenses [Lenses with values based on subjective overrefraction. Typically used together with the corrective device that was present during overrefraction.]
  • None - Uncorrected [There is explicitely nothing in front of the eye during the visual acuity testing.]
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0262]/items[at0080], code=at0080, itemType=SLOT, level=5, text=Lens specification, description=Details of the lens in front of right eye., comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=CLUSTER, bindings=null, values=Include:
openEHR-EHR-CLUSTER.lens_specification.v0, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0262]/items[at0388], code=at0388, itemType=SLOT, level=5, text=Aid device details, description=Details of the devices used to correct for refractive error., comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=CLUSTER, bindings=null, values=Include:
openEHR-EHR-CLUSTER.device.v1 and specialisations, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0262]/items[at0405], code=at0405, itemType=ELEMENT, level=5, text=In front of which eye, description=The eye in front of which the aid device or correction, such as an arrangement of trial lenses, own glasses, contact lenses, pinhole occluders are positioned., comment=For monocular tests where the partner eye is fully occluded, this can be "The eye being tested". There may be exceptionns, such as when the eye that is not being tested explicitely has a fogging lens in front of it to blur, but not block all vision. In binocular tests, this element is expected to occur once with "right eye" and once with "left eye" for each aid placed in front of the eyes. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_CODED_TEXT, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/state[at0041]/items[at0112], code=at0112, itemType=ELEMENT, level=4, text=Confounding Factors, description=Patient circumstances or actions which affect interpretation of the result. Often termed 'reliability' in opthalmological documentation. May include actions aiming improve the patient's ability to participate such as holding the lid open, or indicate an abnormal pupil state., comment=Examples: 'Patient was confused', "Lid held open by hand" "Excentric Fixation" , uncommonOntologyItems=null, occurencesFormal=0..*, occurencesText=Optional, repeating, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=CHOICE, bindings=null, values=Choice of:
, extendedValues=null]], contacts=[], data=[ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0007], code=at0007, itemType=ELEMENT, level=4, text=Eye examined, description=The eye which is being examined, or both eyes., comment=Binding to SNOMED Eye region body Structure codes for coherence with other archetypes, and mappability to .BodySite in FHIR, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_CODED_TEXT, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0151], code=at0151, itemType=ELEMENT, level=4, text=Qualitative result, description=All measures of visual acuity that are not qualitative, such as "Sees hand Movements" or "Light perception"., comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_CODED_TEXT, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0295], code=at0295, itemType=ELEMENT, level=4, text=Meter snellen ratio result, description=Snellen Ratio in meters, where the numerator is the (equivalent or real) desting distance in meters and the denominator is the distance in meters at which the spatial pattern would be separated by a visual angle of one minute of arc. This means the denominator is the distance in meters at which a person with 6/6 visual acuity could still read the line. , comment=Often used with the standard of 6 meters (6/x), which may or may not be the real testing distance. When M Notation is used, the nominator is also the real testing distance., uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_PROPORTION, bindings=null, values=
  • Ratio
  • Fraction
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0296], code=at0296, itemType=ELEMENT, level=4, text=Feet snellen ratio result, description=Snellen Ratio in feet, where the numerator is usually 20 feet and the denominator is the distance in meters at which the spatial pattern would be separated by a visual angle of one minute of arc. This means the denominator is the distance in feet at which a person with 20/20 visual acuity could still read the line., comment=In terms of the definition of the snellen ratio, the numerator is may be 20 independent of the actual testing distance. as this is the equivalent testing distance in terms of which the ratios are compared. A 20 as denominator does not imply actual 20 ft desting distance. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_PROPORTION, bindings=null, values=
  • Ratio
  • Fraction
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0297], code=at0297, itemType=ELEMENT, level=4, text=logMAR result, description=Base-10 Logarithm of the minimum angle of resolution. , comment=This notation used in the majority of scientific publications. When users enter visual acuity test results using decimal numbers, such as 0.5, it needs to be ensured that the intended notation (decimal, logMAR or others) is known to both the user and the software, and the appropriate element is used. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_QUANTITY, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0294], code=at0294, itemType=ELEMENT, level=4, text=Decimal notation result, description=Notation commonly used in Europe, defined as the reciprocal of the minimum agle of resolution in arc minutes. , comment=Can be calculating by dividing the snellen ratio's numerator by its denominator. When users enter visual acuity test results using decimal numbers, such as 0.5, it needs to be ensured that the intended notation (decimal, logMAR or others) is known to both the user and the software, and the appropriate element is used. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_QUANTITY, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0299], code=at0299, itemType=ELEMENT, level=4, text=N font size notation result, description=N font size of the smallest recognized line or text., comment=Strictly not a unit of visual acuity but a measure of symbol size commonly used in near vision testing. A known testing distance is required to estimate the visual angle, 30-40cm is typical for reading distances. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_QUANTITY, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0300], code=at0300, itemType=ELEMENT, level=4, text=Number of recognized optotypes result, description=The number of optotypes correctly identified by the patient on the chart., comment=Commonly reffered to as "Letters read", but can be used for optotypes that are not Letters. Strictly not a measure of VA in itself, but commonly used for VA documentation. Testing distance and Chart Type are required to estimate visual acuity. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_QUANTITY, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0356], code=at0356, itemType=ELEMENT, level=4, text=ETDRS letter score, description=The number of optotypes correctly identified by the patient on a logMAR/ETDRS Chart, including those that are presumed to be readable due to being larger than the smallest line that was read entirely. This includes letters presumed readable at 1m distance. , comment=Commonly used in study settings. This score describes either the number of optotypes identified (letters read): 1. Out of 30 at 1m distance. Or 2. Out of 70 at 4m distance. In which case the 30 letters from the 1m distance are added to the result as they are presumed readable. Typically, an ETDRS letter score of 85 is equivalent to 20/20, 1.0 decimal, 0.0 logMAR. Conversion of this notation requires precise understanding of testing procedures and intended meaning. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_QUANTITY, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0355], code=at0355, itemType=ELEMENT, level=4, text=5-Score notation result, description=Defined as 5 - Logmar, widely used in China., comment=Part of the Chinese national standard GB11533-1989., uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_QUANTITY, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0302], code=at0302, itemType=ELEMENT, level=4, text=Jaeger font size notation result, description=Jaeger font size of the smallest recognized line or text., comment=Strictly not a unit of visual acuity but a measure of symbol size commonly used in near vision testing. A known testing distance is required to estimate the visual angle, 30-40cm is typical for reading distances. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_QUANTITY, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0410], code=at0410, itemType=ELEMENT, level=4, text=Letters missed in or read in addition to scored line, description=Negative: Number of Letters missed in the smallest line that was recorded as being successfully read. Positive: Letters correctly identified in the largest line that was not successfully read. Coded values refer to concept of "partially" read line. , comment=Line-based scoring means lines are scored in their entirety based on whether a certain threshhold (typically 50 or 60%) of their letters were read corretly. Based on this scoring method, it is correct to note the smallest line where that threshold was reached as the visual acuity grade and that is what is expected based on ISO standards. Some persons and institutions additionally record the number of missed letters in the smallest scored line (negative count), the fact that there were missed letters in the smallest scored line (partial) or the number or letters read beyond the smallest scored line (positive count). , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=CHOICE, bindings=null, values=Choice of:
  •  Count
    min: >=-9; max: <=9

  •  Coded Text
    • partial [Some symbols were not read correctly in the smallest line that was scored as being successully read, which is not unusual as the line being scored as correct requires 50 or 60% of symbols being identified correctly. Not actually part of line-based scoring, and a bit controversial but commonly used anyway.]
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0055], code=at0055, itemType=ELEMENT, level=4, text=No test result, description=No visual acuity test result is available for the test eye., comment=Record as True if the clinician was unable to record a result for the test eye., uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_BOOLEAN, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0140], code=at0140, itemType=ELEMENT, level=4, text=Reason for no test result, description=Reason why no visual acuity test result is available for the test eye., comment=For example, patient was not cooperative; patient was not capable; ran out of time., uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_TEXT, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0193], code=at0193, itemType=CLUSTER, level=4, text=Derived Result, description=, comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=1..*, cardinalityText=, subCardinalityFormal=null, subCardinalityText=null, dataType=CLUSTER, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0193]/items[at0319], code=at0319, itemType=ELEMENT, level=5, text=Derived decimal notation result, description=, comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_QUANTITY, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0193]/items[at0320], code=at0320, itemType=ELEMENT, level=5, text=Derived meter snellen ratio result, description=Snellen Ratio in Meters, where the numerator is the (equivalent or real) desting distance in meters and the denominator is the distance in meters at which the spatial pattern would be separated by a visual angle of one minute of arc. This means the denominator is the distance in meters at which a person with 6/6 visual acuity could still read the line. , comment=Often used with the standard of 6 meters (6/x), which may or may not be the real testing distance. When M Notation is used, the nominator is also the real testing distance., uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_PROPORTION, bindings=null, values=
  • Ratio
  • Fraction
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0193]/items[at0321], code=at0321, itemType=ELEMENT, level=5, text=Derived feet snellen ratio result, description=Snellen Ratio in feet, where the numerator is usually 20 feet and the denominator is the distance in meters at which the spatial pattern would be separated by a visual angle of one minute of arc. This means the denominator is the distance in feet at which a person with 20/20 visual acuity could still read the line., comment=In terms of the definition of the snellen ratio, the numerator should be the testing distance in feet, but usually it is 20 as this is the equivalent testing distance in terms of which the ratios are compared. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_PROPORTION, bindings=null, values=
  • Ratio
  • Fraction
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0193]/items[at0322], code=at0322, itemType=ELEMENT, level=5, text=Derived logMAR result, description=Base-10 Logarithm of the Minimum Angle of resolution., comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_QUANTITY, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0193]/items[at0357], code=at0357, itemType=ELEMENT, level=5, text=Derived ETDRS letter score result, description=The number of optotypes correctly identified by the patient on a logMAR/ETDRS Chart, including those that are presumed to be readable due to being larger than the smallest line that was read entirely. This includes letters presumed readable at 1m distance. , comment=Typically in study settings, this score describes either the number of optotypes identified (letters read): 1. Out of 30 at 1m distance. Or 2. Out of 70 at 4m distance. In which case the 30 letters from the 1m distance are added to the result as they are presumed readable. Typically, an ETDRS letter score of 85 is equivalent to 20/20, 1.0 decimal, 0.0 logMAR. Conversion of this notation requires precise understanding of testing procedures and intended meaning. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_QUANTITY, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0040], code=at0040, itemType=ELEMENT, level=4, text=Comment, description=Narrative comment about the visual acuity test., comment=It is a common but controversial practice to comment "partial" where the last line was not read entirely even in line-based scoring. This is covered by the "Letters missed or read in addition to scored line" element. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=CHOICE, bindings=[SNOMED-CT::117364006 | Narrative value], values=Choice of:
  •  Text
  •  Coded Text
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0333], code=at0333, itemType=ELEMENT, level=4, text=Interpretation, description=Interpretation of the results., comment=Not to be used for information about how the test was performed or patient circumstances affecting result., uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=CHOICE, bindings=null, values=Choice of:
  •  Text
  •  Coded Text
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0370], code=at0370, itemType=ELEMENT, level=4, text=Comparative classification, description=Classification of the test and its result as "best" corrected or "best" recorded visual acuity, or both., comment=There is significant variation to how these terms are definied in different settings. These classifiers do not contain information on the actual correction used, which can be recorded within the right/left aid poisition clusters. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_CODED_TEXT, bindings=null, values=
  • BCVA [This result is classified as a Best Corrected Visual Acuity.]
  • BRVA [This result is classified as a Best Recorded Visual Acuity.]
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/data[at0001]/events[at0134]/data[at0003]/items[at0141], code=at0141, itemType=SLOT, level=4, text=Test not done, description=Details to explicitly record that this test was not performed., comment=null, uncommonOntologyItems=null, occurencesFormal=0..*, occurencesText=Optional, repeating, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=CLUSTER, bindings=null, values=Include:
openEHR-EHR-CLUSTER.exclusion_exam.v1 and specialisations, extendedValues=null]], context=[], target=[]}, topLevelItems={state=ResourceSimplifiedHierarchyItem [path=ROOT_/data[at0001]/events[at0134]/state[at0041], code=at0041, itemType=ITEM_TREE, level=2, text=null, description=null, comment=null, uncommonOntologyItems=null, occurencesFormal=1..1, occurencesText=Mandatory, cardinalityFormal=0..1, cardinalityText=optional, subCardinalityFormal=0..*, subCardinalityText=Minimum of 0 items, dataType=ITEM_TREE, bindings=null, values=null, extendedValues=null], protocol=ResourceSimplifiedHierarchyItem [path=ROOT_/protocol[at0020], code=at0020, itemType=ITEM_TREE, level=0, text=null, description=null, comment=null, uncommonOntologyItems=null, occurencesFormal=1..1, occurencesText=Mandatory, cardinalityFormal=0..1, cardinalityText=optional, subCardinalityFormal=0..*, subCardinalityText=Minimum of 0 items, dataType=ITEM_TREE, bindings=null, values=null, extendedValues=null], data=ResourceSimplifiedHierarchyItem [path=ROOT_/data[at0001]/events[at0134]/data[at0003], code=at0003, itemType=ITEM_TREE, level=2, text=null, description=null, comment=null, uncommonOntologyItems=null, occurencesFormal=1..1, occurencesText=Mandatory, cardinalityFormal=0..1, cardinalityText=optional, subCardinalityFormal=0..*, subCardinalityText=Minimum of 0 items, dataType=ITEM_TREE, bindings=null, values=null, extendedValues=null]}, addHierarchyItemsTo=protocol, currentHierarchyItemsForAdding=[ResourceSimplifiedHierarchyItem [path=/protocol[at0020]/items[at0363], code=at0363, itemType=ELEMENT, level=2, text=Best corrected visual acuity definition, description=The definition of BCVA that applies to the comparative classification element, comment=Ideally, this would include a description of the process how the lens powers of the best correction are determined. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_TEXT, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/protocol[at0020]/items[at0365], code=at0365, itemType=ELEMENT, level=2, text=Best recorded visual acuity definition, description=The definition of BRVA that applies to the comparative classification element. , comment=This is typically a rectrospective comparison of visual acuity measures of the same eye on the same day or the same encounter. Ideally, this would include a description of the the comparison is performed. Specifically, whether measurements aided by pinhole occluder were excluded or not. , uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_TEXT, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/protocol[at0020]/items[at0332], code=at0332, itemType=ELEMENT, level=2, text=Description of derived results calculation, description=A text description used to describe the manner in which the derived results were determined., comment=null, uncommonOntologyItems=null, occurencesFormal=0..*, occurencesText=Optional, repeating, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_TEXT, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/protocol[at0020]/items[at0022], code=at0022, itemType=ELEMENT, level=2, text=Chart scoring algorithm, description=The alogrithm used to determine the score., comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_CODED_TEXT, bindings=null, values=
  • Single letter [A single letter algorithm was used to derive the visual acuity score.]
  • Whole line [A whole line algorithm was used to derive the visual acuity score.]
  • Last line single letter [A last line single letter algorithm was used to derive the visual acuity score.]
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/protocol[at0020]/items[at0244], code=at0244, itemType=ELEMENT, level=2, text=Background luminance, description=This should be Candela Per Square meter., comment=null, uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=DV_QUANTITY, bindings=null, values=, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/protocol[at0020]/items[at0256], code=at0256, itemType=ELEMENT, level=2, text=Ambient lighting, description=The ambient lighting in the room where the visual acuity testing ist taking place., comment=May be described either as Illuminance or Luminance., uncommonOntologyItems=null, occurencesFormal=0..1, occurencesText=Optional, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=CHOICE, bindings=null, values=Choice of:
  •  Quantity
    Property: Illuminance
    Units: lx
  •  Coded Text
    • Photopic [Bright or Daylight conditions, where cone function dominates.]
    • Mesopic [Twilight conditions, where both rods and cones are active.]
    • Scotopic [Dark Conditions, where rod function dominates.]
, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/protocol[at0020]/items[at0025], code=at0025, itemType=SLOT, level=2, text=Stimulus device details, description=Details of the devices used provide a stimulus to be resolved by the eye being tested, such as a chart, projector or digital display., comment=null, uncommonOntologyItems=null, occurencesFormal=0..*, occurencesText=Optional, repeating, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=CLUSTER, bindings=null, values=Include:
openEHR-EHR-CLUSTER.device.v1 and specialisations, extendedValues=null], ResourceSimplifiedHierarchyItem [path=/protocol[at0020]/items[at0143], code=at0143, itemType=SLOT, level=2, text=Extension, description=Additional information required to capture local content or to align with other reference models/formalisms., comment=For example: local information requirements or additional metadata to align with FHIR or CIMI equivalents., uncommonOntologyItems=null, occurencesFormal=0..*, occurencesText=Optional, repeating, cardinalityFormal=null, cardinalityText=null, subCardinalityFormal=null, subCardinalityText=null, dataType=CLUSTER, bindings=null, values=Include:
All not explicitly excluded archetypes, extendedValues=null]], minIndents={}, termBindingRetrievalErrorMessage=null]