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.

LOINCActive

LOINC Code 28946-2: Right contact lens prescription Over refraction axis

Name: LOINC Code 28946-2: Right contact lens prescription Over refraction axis
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:15.024Z

28946-2 is a LOINC code used to identify Right contact lens prescription Over refraction axis 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 Over refraction axis. It is commonly used with the system or sample type Contact lens.prescription.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 Over refraction axis. It is commonly used with the system or sample type Contact lens.prescription.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

What it does not mean

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

Key facts

Right contact lens prescription Over refraction axis
Over refraction axis
Cont lens; EYE; EYE.CONTACT_LENS; Ophthalmology; Ophtho; Ophthy; OR axis; Point in time; QNT; Quan; Quant; Quantitative; R; R cont lens Rx; Random; RT; Rx

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 contact lens prescription Over refraction axisR cont lens Rx OR axisOver refraction axisEYE.CONTACT_LENSAnglePtContact lens.prescription.right

Frequently asked questions

Code details

Code28946-2

SystemLOINC

Display nameRight contact lens prescription Over refraction axis

DescriptionOver refraction axis

Short nameR cont lens Rx OR axis

ComponentOver refraction axis

PropertyAngle

TimingPt

System (specimen)Contact lens.prescription.right

ScaleQn

ClassEYE.CONTACT_LENS

Example unitsdeg

StatusACTIVE

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.00

Last changed2.70

Part names

Over refraction axisAnglePtContact lens.prescription.rightQnPoint in time (spot)Right contact lens prescription

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.