Method and apparatus for measuring visual function

Details Method and apparatus for measuring visual function Method and apparatus for measuring visual function

1991-04-26

1993-06-29

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351329, 351240, 351241, A61B 302

Patent

active

052238652

ABSTRACT:
The inventive method and apparatus are based on the display of a striped target with constantly accurate contrast to the patient for finding a visual function disturbance associated with such eye diseases as glaucoma or diabetic repinopathy at their earlier stage. A sight target of striped pattern is formed on the screen having a uniform brightness, the striped target is oscillated in the direction orthogonal to the striped pattern while varying the contrast of striped target and showing it to the patient, and the threshold of the pattern contrast which can be recognized visually by the patient is measured.

REFERENCES:
patent: 3623799 (1971-11-01), Millodot
patent: 4012128 (1977-03-01), Regan
patent: 4145123 (1979-03-01), Krahn
patent: 4511228 (1985-04-01), von Gierke et al.
patent: 4572630 (1986-02-01), Task et al.

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