Method and device for visual examination

Details Method and device for visual examination Method and device for visual examination

1999-11-03

2000-10-10

Manuel, George

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

For fusion and space perception testing

A61B 308

Patent

active

061294365

ABSTRACT:
A method and device allows to instantly determine the critical fusion frequency of a person without changing the routine viewing and lighting conditions. For a personal computer user, a window with running stripes or a blinking dot is projected onto a video monitor over an existing application. Gradual increase of the blinking frequency until the fusion of the test object is used in determining the critical fusion frequency. Provisions are made to adjust individually such parameters as a distance from the monitor, brightness, contrast, color and surrounding lighting which leads to improved vision and increased critical fusion frequency as can be verified by the same method and device once adjustment is complete. In a second embodiment, a series of dots, each blinking with an individual frequency is presented to the person to choose the one appearing non-blinking with the lowest blinking frequency thus defining the critical fusion frequency.

REFERENCES:
patent: 5344324 (1994-09-01), O'Donnell et al.

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