LOINCActiveObservation

LOINC Code 79828-0: Contrast sensitivity [Log Inverse Percent] of Left eye by Pelli-Robson eye chart

79828-0 is a LOINC code used to identify Contrast sensitivity [Log Inverse Percent] of Left eye by Pelli-Robson eye chart 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 Contrast sensitivity. 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 Contrast sensitivity. 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: Pelli-Robson eye chart

What it does not mean

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

Key facts

  • Contrast sensitivity [Log Inverse Percent] of Left eye by Pelli-Robson eye chart
  • Contrast sensitivity
  • 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).
  • c; Contr; Contr sens; Contra; Contrst; Eye; EYE.PX; EYE.PX.NEI; Eyeball; L; L eye; LT; Occular; Oculis; Ophthalmologic; Ophthalmology; Ophtho; Ophthy; Optic globe; Point in time; QNT; Quan; Quant; Quantitative; 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

Contrast sensitivity [Log Inverse Percent] of Left eye by Pelli-Robson eye chartL eye Contr sens Pelli-RobsonContrast sensitivityEYE.PX.NEILogInvPctPtEye.left

Frequently asked questions

Code details

Code79828-0
SystemLOINC
Display nameContrast sensitivity [Log Inverse Percent] of Left eye by Pelli-Robson eye chart
DescriptionContrast sensitivity
Short nameL eye Contr sens Pelli-Robson
ComponentContrast sensitivity
PropertyLogInvPct
TimingPt
System (specimen)Eye.left
ScaleQn
MethodPelli-Robson eye chart
ClassEYE.PX.NEI
Example unitslog
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

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

Part names

Contrast sensitivityLogInvPctPtEye.leftQnPelli-Robson eye chartLog Inverse PercentPoint in time (spot)Left eyeby Pelli-Robson eye chart

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.