LOINCActiveObservation

LOINC Code 79855-3: Right palpebral fissure Opening height

79855-3 is a LOINC code used to identify Right palpebral fissure Opening height 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 Opening height. It is commonly used with the system or sample type Palpebral fissure.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 Opening height. It is commonly used with the system or sample type Palpebral fissure.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
  • Order vs observation: Observation

What it does not mean

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

Key facts

  • Right palpebral fissure Opening height
  • Opening height
  • This term was developed in collaboration with the National Institute of Health's National Eye Institute (NEI) as part of an effort to standardize the data elements collected by the National Ophthalmic Disease Genotyping and Phenotyping Network (eyeGENE).
  • EYE; EYE.PX; EYE.PX.NEI; Length; Opening ht; Ophthalmology; Ophtho; Ophthy; Point in time; QNT; Quan; Quant; Quantitative; R; R palpebral fiss; Random; RT

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 palpebral fissure Opening heightR palpebral fiss Opening htOpening heightEYE.PX.NEILenPtPalpebral fissure.right

Frequently asked questions

Code details

Code79855-3
SystemLOINC
Display nameRight palpebral fissure Opening height
DescriptionOpening height
Short nameR palpebral fiss Opening ht
ComponentOpening height
PropertyLen
TimingPt
System (specimen)Palpebral fissure.right
ScaleQn
ClassEYE.PX.NEI
Example unitsmm
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.54
Last changed2.68

Part names

Opening heightLenPtPalpebral fissure.rightQnLengthPoint in time (spot)Right palpebral fissure

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.

LOINC Code 79855-3 | HealthAssure