LOINC Code 79770-4: Left retina Arden ratio by EOG

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 Arden ratio. It is commonly used with the system or sample type Retina.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: Electrooculogram

What it does not mean

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

Key facts

• Left retina Arden ratio by EOG
• Arden ratio
• 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).
• Arden rto; EOG; EYE; EYE.EOG; EYE.EOG.NEI; L; L ret; LT; Ophthalmology; Ophtho; Ophthy; Point in time; QNT; Quan; Quant; Quantitative; Random

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

Frequently asked questions