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 29128-6: Left eye Corneal indentation depth Schistz tonometry

Name: LOINC Code 29128-6: Left eye Corneal indentation depth Schistz tonometry
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:15.473Z

29128-6 is a LOINC code used to identify Left eye Corneal indentation depth Schistz tonometry 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 Corneal indentation depth. 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 Corneal indentation depth. 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
Method: Tonometry.Schistz

What it does not mean

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

Key facts

Left eye Corneal indentation depth Schistz tonometry
Corneal indentation depth
Corn indent depth; Dpth; Eye; EYE.TONOMETRY; Eyeball; Glaucoma testing; Impression tonometry; L; L eye; Length; 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 Corneal indentation depth Schistz tonometryL eye Corn indent depth SchistzCorneal indentation depthEYE.TONOMETRYLenPtEye.left

Frequently asked questions

Code details

Code29128-6

SystemLOINC

Display nameLeft eye Corneal indentation depth Schistz tonometry

DescriptionCorneal indentation depth

Short nameL eye Corn indent depth Schistz

ComponentCorneal indentation depth

PropertyLen

TimingPt

System (specimen)Eye.left

ScaleQn

MethodTonometry.Schistz

ClassEYE.TONOMETRY

Example unitsmm

StatusACTIVE

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.00

Last changed2.70

Part names

Corneal indentation depthLenPtEye.leftQnTonometry.SchistzLengthPoint 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.