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 99231-3: Frequency of seeing double images when not wearing corrective lenses in past 7 days

Name: LOINC Code 99231-3: Frequency of seeing double images when not wearing corrective lenses in past 7 days
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:33.064Z

99231-3 is a LOINC code used to identify Frequency of seeing double images when not wearing corrective lenses in past 7 days 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 Frequency of seeing double images when not wearing corrective lenses in past 7D. It is commonly used with the system or sample type ^Patient.

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 Frequency of seeing double images when not wearing corrective lenses in past 7D. It is commonly used with the system or sample type ^Patient.

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

Frequency of seeing double images when not wearing corrective lenses in past 7 days
Frequency of seeing double images when not wearing corrective lenses in past 7D
EYE; EYE.HX; Finding; Findings; Freq double images w/o corr lens pst 7D; Last; Ordinal; Ql; Qual; Qualitative; Screen

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

Frequency of seeing double images when not wearing corrective lenses in past 7 daysFreq double images w/o corr lens pst 7DFrequency of seeing double images when not wearing corrective lenses in past 7DEYE.HXFind7D^Patient

Frequently asked questions

Code details

Code99231-3

SystemLOINC

Display nameFrequency of seeing double images when not wearing corrective lenses in past 7 days

DescriptionFrequency of seeing double images when not wearing corrective lenses in past 7D

Short nameFreq double images w/o corr lens pst 7D

ComponentFrequency of seeing double images when not wearing corrective lenses in past 7D

PropertyFind

Timing7D

System (specimen)^Patient

ScaleOrd

ClassEYE.HX

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.72

Last changed2.72

Part names

Frequency of seeing double images when not wearing corrective lenses in past 7DFind7D^PatientOrdFrequency of seeing double images when not wearing corrective lenses in past 7 daysFinding7 days

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.