Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – Subjective type
Patent
1993-10-29
1995-10-24
Sikes, William L.
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
Subjective type
351224, A61B 302
Patent
active
054614368
ABSTRACT:
In a color field test where the field background is of a first color--preferably yellow--and the illuminating spot is of a second and different color--preferably blue, a translucent occluder is utilized for the eye. The translucent occluder is chosen to permit entry of light having the color of the background--here yellow--while filtering out substantially all light of the spot color--here blue. There results the ability to conduct a field test in color where retinal rivalry interference with the test is held to a minimum.
REFERENCES:
patent: 3269792 (1966-08-01), Mirsky
patent: 5094524 (1992-03-01), Fuhr
patent: 5220361 (1993-06-01), Lehmer et al.
patent: 5293532 (1994-03-01), Marshall
Dang Hung Xuan
Humphrey Instruments Inc.
Sikes William L.
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