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 71485-7: Right optic nerve Cup-disc ratio by Ophthalmoscopy

Name: LOINC Code 71485-7: Right optic nerve Cup-disc ratio by Ophthalmoscopy
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:50.623Z

71485-7 is a LOINC code used to identify Right optic nerve Cup-disc ratio by Ophthalmoscopy 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 Cup-disc ratio. It is commonly used with the system or sample type Optic nerve.right.

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 Cup-disc ratio. It is commonly used with the system or sample type Optic nerve.right.

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: Ophthalmoscopy

What it does not mean

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

Key facts

Right optic nerve Cup-disc ratio by Ophthalmoscopy
Cup-disc ratio
Measures the progress of glaucoma. The cup-to-disc ratio compares the diameter of the "cup" portion of the optic disc with the total diameter of the optic disc. Results are a decimal range from 0.0 to 1.0.
EYE; EYE.PX; Length Ratio; Ophthalmology; Ophtho; Ophthy; Point in time; QNT; Quan; Quant; Quantitative; R; R optic n; Random; RT

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

Right optic nerve Cup-disc ratio by OphthalmoscopyR optic n Cup-disc ratio OphthalmoscopyCup-disc ratioEYE.PXLenRtoPtOptic nerve.right

Frequently asked questions

Code details

Code71485-7

SystemLOINC

Display nameRight optic nerve Cup-disc ratio by Ophthalmoscopy

DescriptionCup-disc ratio

Short nameR optic n Cup-disc ratio Ophthalmoscopy

ComponentCup-disc ratio

PropertyLenRto

TimingPt

System (specimen)Optic nerve.right

ScaleQn

MethodOphthalmoscopy

ClassEYE.PX

Example unitsratio

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.40

Last changed2.73

Part names

Cup-disc ratioLenRtoPtOptic nerve.rightQnOphthalmoscopyLength RatioPoint in time (spot)Right optic nerveby Ophthalmoscopy

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.