Visual test utilizing color frequency doubling

Details Visual test utilizing color frequency doubling Visual test utilizing color frequency doubling

1999-05-14

2000-05-30

Manuel, George

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

351246, A61B 310

Patent

active

060683775

ABSTRACT:
A novel psychophysical visual test is proposed for testing a person for glaucoma, and based on the discovery that a frequency doubling phenomenon is produced by isoluminent color visual stimuli. More specifically, it is proposed to construct a visual stimulus for which alternating colors in a grating pattern is the only basis for producing the frequency doubling phenomenon. That is, the colors are of the same luminance or intensity level, i.e., isoluminent, but each grating or pattern alternates from one color to another. Preferably, the colors are complementary color pairs, such as blue and yellow.

REFERENCES:
patent: 5065767 (1991-11-01), Maddess
patent: 5539482 (1996-07-01), James et al.
patent: 5912723 (1999-06-01), Maddess

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