for testing visual acuity; for determination of refraction, e.g. phoropters

Introduced: January 1990

Last revised: January 2006

Full Title

Apparatus for testing the eyes; Instruments for examining the eyes > Subjective types, i.e. testing apparatus requiring the active assistance of the patient > for testing visual acuity; for determination of refraction, e.g. phoropters

Classification Context

Section:: HUMAN NECESSITIES
Class:: MEDICAL OR VETERINARY SCIENCE; HYGIENE
Subclass:: DIAGNOSIS; SURGERY; IDENTIFICATION

3 direct subcodes

Child Classifications

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A61B 3/032 Devices for presenting test symbols or characters, e.g. test chart projectors
A61B 3/036 for testing astigmatism
A61B 3/04 Trial frames; Sets of lenses for use therewith