Method and apparatus for examining and photographing the ocular

Details Method and apparatus for examining and photographing the ocular Method and apparatus for examining and photographing the ocular

1978-12-18

1980-12-09

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

351 14, 351 16, 351 39, 354 62, A61B 610, A61B 314, G03B 2900

Patent

active

042381428

ABSTRACT:
An instrument for photographing the ocular fundus is aligned by using a physical aperture designed to permit illumination of only a small area of the optic disc for minimal patient awareness of incident light and corresponding pupil dilation without mydriatics. The increased field of view and obliquity of viewing afforded by pupil dilation permits flashing of the fundus for photographic recording without image obscuring corneal reflections. The light restricting aperture is removed immediately before photographic recording.

REFERENCES:
patent: 3843240 (1974-10-01), Cornsweet
patent: 3915564 (1975-10-01), Urban
patent: 4132466 (1979-01-01), Matsumura

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