Process and apparatus for examining the visual functions of...

Details Process and apparatus for examining the visual functions of... Process and apparatus for examining the visual functions of...

2008-07-08

2008-07-08

Hasan, Mohammed (Department: 2873)

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

C351S200000, C351S246000

Reexamination Certificate

active

07396128

ABSTRACT:
The visual function is determined with the help of test images, comprising inducing photostress induced by illuminating the eye with an intense light, then measuring the time needed for the recovery of the visual function before the illumination. The test images are periodically moving test images, and the visual function is determined on the basis of detecting the phenomenon of optokinetic nystagmus. According to another process the visual function is determined by measuring critical fusion frequency (CFF) before and after the photostress.

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patent: 5550602 (1996-08-01), Braeuning
patent: 5953102 (1999-09-01), Berry
patent: 6176581 (2001-01-01), Newsome
patent: 6293675 (2001-09-01), Eger
patent: 736 340 (1943-06-01), None

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