HL7 FHIR® Implementation Guide: Ophthalmology Retinal, Release 1
0.1.0 - STU 1 Ballot

HL7 FHIR® Implementation Guide: Ophthalmology Retinal, Release 1, published by HL7 International - Patient Care WG. This is not an authorized publication; it is the continuous build for version 0.1.0). This version is based on the current content of https://github.com/HL7/fhir-eyecare-ig/ and changes regularly. See the Directory of published versions

## ValueSet: Visual acuity chart valueset (SNOMED)

Summary

Defining URL: | http://terminology.hl7.org/uv/eyecare/ValueSet/observation-visual-acuity-methods
Version: | 0.1.0
Name: | OphthalmologyVisualAcuityMethods
Title: | Visual acuity chart valueset (SNOMED)
Status: | Experimental as of 2019-05-01
Definition: | Describes the various charts that can be used to assess visual acuity where concept descends from 400912000 (Visual acuity test equipment (physical object))
Publisher: | HL7 International - Patient Care WG
Copyright: | This value set includes content from SNOMED CT, which is copyright © 2002+ International Health Terminology Standards Development Organisation (IHTSDO), and distributed by agreement between IHTSDO and HL7. Implementer use of SNOMED CT is not covered by this agreement
Source Resource: | XML / JSON / Turtle

References

- Visual Acuity (VA)

### Logical Definition (CLD)

- Include codes from `http://snomed.info/sct` where concept descends from 400912000 (Visual acuity test equipment (physical object))

### Expansion

This value set contains 9 concepts

Expansion based on SNOMED CT International edition 31-Mar 2022

All codes in this table are from the system `http://snomed.info/sct`

Code | Display
400913005 | Snellen chart (physical object)
400914004 | ETDRS visual acuity chart
400915003 | Allen cards (physical object)
400916002 | HOTV cards (physical object)
416307006 | Laser inferometer for potential acuity testing (physical object)
417283003 | Potential acuity meter (physical object)
418295001 | Near card (physical object)
418570001 | Accommodative rule (physical object)
421763006 | Visual acuity chart (physical object)

Explanation of the columns that may appear on this page:

Level | A few code lists that FHIR defines are hierarchical - each code is assigned a level. In this scheme, some codes are under other codes, and imply that the code they are under also applies
Source | The source of the definition of the code (when the value set draws in codes defined elsewhere)
Code | The code (used as the code in the resource instance)
Display | The display (used in the display element of a Coding). If there is no display, implementers should not simply display the code, but map the concept into their application
Definition | An explanation of the meaning of the concept
Comments | Additional notes about how to use the code