LOINCActiveObservation

LOINC Code 98377-5: Left eye Horizontal prism - out far by Phoropter

98377-5 is a LOINC code used to identify Left eye Horizontal prism - out far 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 Horizontal prism.out far. 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 Horizontal prism.out far. 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 Horizontal prism - out far by Phoropter
  • Horizontal prism.out far
  • by Phoropter; Eye; EYE.REFRACTION; Eyeball; H prism-out; H prism-out far; Inverse Length; 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

Left eye Horizontal prism - out far by PhoropterL eye H prism-out far by PhoropterHorizontal prism.out farEYE.REFRACTIONInvLenPtEye.left

Frequently asked questions

Code details

Code98377-5
SystemLOINC
Display nameLeft eye Horizontal prism - out far by Phoropter
DescriptionHorizontal prism.out far
Short nameL eye H prism-out far by Phoropter
ComponentHorizontal prism.out far
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 released2.71
Last changed2.71

Part names

Horizontal prism.out farInvLenPtEye.leftQnPhoropterHorizontal prism - out farInverse 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.