OPTOTYPE FOR EXAMINATION OF VISUAL ACUITY

摘要

FIELD: ophthalmology.;SUBSTANCE: invention refers to medicine, namely to ophthalmology. Optotype for studying visual acuity is a ring. Optotype for investigating visual acuity has ring rupture in the form of circle, diameter of which relates to outer ring diameter as 1:5, and ring thickness relates to diameter of rupture in the form of circle 1:1.;EFFECT: using the given invention will make it possible to increase effectiveness and objectiveness of measurement of visual acuity.;1 cl, 2 dwg