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 98453-4: Left eye Vertical prism - down intermediate by Phoropter

Name: LOINC Code 98453-4: Left eye Vertical prism - down intermediate by Phoropter
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:31.430Z

98453-4 is a LOINC code used to identify Left eye Vertical prism - down intermediate by Phoropter 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 Vertical prism.down intermediate. 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 Vertical prism.down intermediate. 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: Phoropter

What it does not mean

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

Key facts

Left eye Vertical prism - down intermediate by Phoropter
Vertical prism.down intermediate
by Phoropter; EYE.REFRACTION; Eyeball; Inverse Length; L; L eye; LT; Occular; Oculis; Ophthalmologic; Optic globe; Point in time; QNT; Quan; Quant; Quantitative; Random; V prism-down; V prism-down inter; 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 Vertical prism - down intermediate by PhoropterL eye V prism-down inter by PhoropterVertical prism.down intermediateEYE.REFRACTIONInvLenPtEye.left

Frequently asked questions

Code details

Code98453-4

SystemLOINC

Display nameLeft eye Vertical prism - down intermediate by Phoropter

DescriptionVertical prism.down intermediate

Short nameL eye V prism-down inter by Phoropter

ComponentVertical prism.down intermediate

PropertyInvLen

TimingPt

System (specimen)Eye.left

ScaleQn

MethodPhoropter

ClassEYE.REFRACTION

Example unitsprism diopter

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.72

Last changed2.72

Part names

Vertical prism.down intermediateInvLenPtEye.leftQnPhoropterVertical prism - down intermediateInverse LengthPoint 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.