Optical instrument for examining the eye fundus

Details Optical instrument for examining the eye fundus Optical instrument for examining the eye fundus

1976-05-18

1978-01-17

Sacher, Paul A.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

351 9, 351 13, 351 16, 354 62, A61B 314

Patent

active

040689328

ABSTRACT:
The present invention relates to an optical instrument for examining the eye fundus which is so designed that in the optical system including an objective lens visible, targets are built for orientating the visual line of the eye to be inspected along the direction convenient for the inspection of the desired part of the eye fundus in order to be able to inspect the desired part. The visible targets are located at the position conjugate to the eye fundus with regard to the optical system including the objective lens in order that the light beam coming from the targets through the objective lens reaches the eye to be inspected. The image of the visible targets is formed on the eye fundus of the eye to be inspected while the eye to be inspected observes the visible targets through the objective lens in such a manner that the visual line is oriented in the direction along which the targets are seen.

REFERENCES:
patent: 3217622 (1965-11-01), Kiyono
patent: 3925793 (1975-12-01), Matsumara
"Color Photography . . . Fundus," J. Biological Photographic Assoc., 12-1941, pp. 119-135.

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