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

## CodeSystem: Visual field test parameter observations

Summary

Defining URL: | http://terminolgy.hl7.org/uv/eyecare/CodeSystem/visual-field-observations
Version: | 0.1.0
Name: | OphthalmologyVisualFieldObservations
Title: | Visual field test parameter observations
Status: | Draft as of 2021-08-07
Definition: | Visual field observation additional codes
Publisher: | HL7 International - Patient Care WG
Copyright: | HL7
Content: | Complete: All the concepts defined by the code system are included in the code system resource
Source Resource: | XML / JSON / Turtle

This Code system is referenced in the content logical definition of the following value sets:

This CodeSystem is not used here; it may be used elsewhere (e.g. specifications and/or implementations that use this content)

This code system http://terminolgy.hl7.org/uv/eyecare/CodeSystem/visual-field-observations defines the following codes:

Code | Display | Definition
400204 | Fixation loss | Fixation loss occurs when the patient reports seeing a stimulus that is presented in the predicted area of the physiologic blind spot
400202 | False positive percent | Percentage of false positive responses
400203 | False negative percent | Percentage of false negative reponses
400205 | False positive ratio | Ratio of false positive responses to total responses
400206 | False negative ratio | Ratio of false negative responses to total responses