Apparatus for determination of potential visual acuity utilizing

Details Apparatus for determination of potential visual acuity utilizing Apparatus for determination of potential visual acuity utilizing

1983-10-12

1985-11-12

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351211, A61B 310

Patent

active

045524408

ABSTRACT:
In order to determine the visual acuity in the human eye in the presence of cataracts or other opacities, a conventional slit lamp microscope having an illumination source, an aperture illuminated thereby, and a converging lens, has been modified by the insertion of a target transparency having test figures thereon between the aperture and converging lens. The inclusion of a set of trial lenses positioned adjacent to the eye to neutralize refractive error, movement axially of the target transparency, and the inclusion of a telescopic optical system also axially adjustable is contemplated.

REFERENCES:
patent: 1755705 (1930-04-01), Reid
patent: 4196980 (1980-04-01), Heine
patent: 4220401 (1980-09-01), Muchel
patent: 4272165 (1981-06-01), Muchel

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