LOINCActive

LOINC Code 28845-6: Left glasses lens prescription Prism base direction

28845-6 is a LOINC code used to identify Left glasses lens prescription Prism base direction 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 Prism base direction. It is commonly used with the system or sample type Glasses prescription.lens.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 Prism base direction. It is commonly used with the system or sample type Glasses prescription.lens.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

What it does not mean

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

Key facts

  • Left glasses lens prescription Prism base direction
  • Prism base direction
  • EYE; EYE.GLASSES; Glasses Rx; L; L glasses Rx; LT; Ophthalmology; Ophtho; Ophthy; Point in time; QNT; Quan; Quant; Quantitative; Random; Rx

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 glasses lens prescription Prism base directionL glasses Rx Prism base dirPrism base directionEYE.GLASSESAnglePtGlasses prescription.lens.left

Frequently asked questions

Code details

Code28845-6
SystemLOINC
Display nameLeft glasses lens prescription Prism base direction
DescriptionPrism base direction
Short nameL glasses Rx Prism base dir
ComponentPrism base direction
PropertyAngle
TimingPt
System (specimen)Glasses prescription.lens.left
ScaleQn
ClassEYE.GLASSES
Example unitsdeg
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.00
Last changed2.71

Part names

Prism base directionAnglePtGlasses prescription.lens.leftQnPoint in time (spot)Left glasses lens prescription

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.