What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveObservation

LOINC Code 93120-4: Left eye Dark-mediated rod adaptation time

Name: LOINC Code 93120-4: Left eye Dark-mediated rod adaptation time
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:22.239Z

93120-4 is a LOINC code used to identify Left eye Dark-mediated rod adaptation time 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 Dark-mediated rod adaptation time. 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 Dark-mediated rod adaptation time. 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

What it does not mean

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

Key facts

Left eye Dark-mediated rod adaptation time

Dark-mediated rod adaptation time

This term was created for, but is not limited in use to, the Rod Intercept™ (RI™) as measured by the AdaptDx®. Rod Intercept™ is the duration between exposure to a bright light (photo bleaching using a flash) and recovery of a visual sensitivity by the eye's rod photoreceptors to a threshold of 3.0 log units of attenuation of the stimulus. The rod-intercept time is used to quantify rod-mediated dark adaptation (DA), and slower DA is associated with the early phases of age-related macular degeneration (AMD). [PMID26522707] Rod Intercept™ (RI™) © 2019 MacuLogix, Inc. Used with permission.

Dark rod adaptation tm; EYE.PX; Eyeball; L; L eye; LT; Occular; Oculis; Ophthalmologic; Optic globe; Point in time; QNT; Quan; Quant; Quantitative; Random; Rod intercept (TM); 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 Dark-mediated rod adaptation timeL eye Dark rod adaptation tmDark-mediated rod adaptation timeEYE.PXTimePtEye.left

Frequently asked questions

Code details

Code93120-4

SystemLOINC

Display nameLeft eye Dark-mediated rod adaptation time

DescriptionDark-mediated rod adaptation time

Short nameL eye Dark rod adaptation tm

ComponentDark-mediated rod adaptation time

PropertyTime

TimingPt

System (specimen)Eye.left

ScaleQn

ClassEYE.PX

Example unitsmin

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.67

Last changed2.68

Part names

Dark-mediated rod adaptation timeTimePtEye.leftQnTime (e.g. seconds)Point in time (spot)Left eye

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.