LOINCActiveObservation

LOINC Code 79808-2: Left eye Visual field defects by Confrontation

79808-2 is a LOINC code used to identify Left eye Visual field defects by Confrontation in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Visual field defects. It is commonly used with the system or sample type Eye.left.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Visual field defects. It is commonly used with the system or sample type Eye.left.

When is it used?

  • Used in lab systems, EHRs, and clinical data exchange.
  • May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
  • Status: ACTIVE
  • Order vs observation: Observation
  • Method: Confrontation

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • Left eye Visual field defects by Confrontation
  • Visual field defects
  • This term was developed in collaboration with the National Institute of Health's National Eye Institute (NEI) as part of an effort to standardize the data elements collected by the National Ophthalmic Disease Genotyping and Phenotyping Network (eyeGENE).
  • Eye; EYE.VISUAL_FIELD; EYE.VISUAL_FIELD.NEI; Eyeball; Finding; Findings; L; L eye; LT; Nominal; Occular; Oculis; Ophthalmologic; Ophthalmology; Ophtho; Ophthy; Optic globe; Point in time; Random; Vision; Visual

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Left eye Visual field defects by ConfrontationL eye Visual field def ConfrontationVisual field defectsEYE.VISUAL_FIELD.NEIFindPtEye.left

Frequently asked questions

Code details

Code79808-2
SystemLOINC
Display nameLeft eye Visual field defects by Confrontation
DescriptionVisual field defects
Short nameL eye Visual field def Confrontation
ComponentVisual field defects
PropertyFind
TimingPt
System (specimen)Eye.left
ScaleNom
MethodConfrontation
ClassEYE.VISUAL_FIELD.NEI
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.54
Last changed2.68

Part names

Visual field defectsFindPtEye.leftNomConfrontationFindingPoint in time (spot)Left eyeby Confrontation

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

LOINC Code 79808-2 | HealthAssure