Apparatus and method for testing the motion contrast visual sens

Details Apparatus and method for testing the motion contrast visual sens Apparatus and method for testing the motion contrast visual sens

1987-01-02

1988-12-06

Bovernick, Rodney B.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Subjective type

351246, 351245, 351238, A61B 302

Patent

active

047892340

ABSTRACT:
The motion contrast visual sensitivity of an individual is tested by means of a target having thereon patches each composed of alternating light and dark bars, with individual patches varying in contrast and spatial frequency, and also in orientation. The target is viewed by way of a slot through a housing positioned in front of the individual under test, and a shutter rotating within the housing at a controlled speed periodically blocks the slot at a rate sufficiently slow, e.g. 30 cycles per second, for the observer to detect the resulting conditions of flicker.

REFERENCES:
patent: 2000153 (1935-05-01), Watson
patent: 3524702 (1970-08-01), Bellows et al.
patent: 3807839 (1974-04-01), Sugarman et al.
patent: 4493539 (1985-01-01), Cannon, Jr.
patent: 4511228 (1985-04-01), Von Gierke et al.
patent: 4526452 (1985-07-01), Hirsch
patent: 4550990 (1985-11-01), Trispel et al.

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