Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Combined
Patent
1992-05-15
1994-06-21
Sikes, William L.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Combined
351170, G02C 100
Patent
active
053231902
ABSTRACT:
A pair of rotatable optical image deflector assemblies is disclosed which are detachably mounted via an adapter bracket to a conventional eye testing apparatus. Each optical image deflector assembly has a fixed light reflecting optical element, and a pivotal reflecting optical element. The optical image deflector assembly directs light onto a peripheral area of a visually sensitive or functional area of the retina which is normal to the central field of the retina. The pivotal optical element scans a pre-set field expanding test chart and projects an image thereof to the visually sensitive or functional area of the retina. The optical image deflector assembly is usable in making prismatic eye glasses to expand the normal central field of view of a person suffering from retinitis pigmentosa or hemianopia. The prismatic eye glasses refract images from a field outside the normal central field of view within and along the peripheral edge of the visually sensitive central area of the retina for expanding the normal central field of view.
REFERENCES:
patent: 4288149 (1981-09-01), Campbell
patent: 4381142 (1983-04-01), Bommarito
patent: 4779972 (1988-10-01), Gottlieb
patent: 5155508 (1992-10-01), Onufryk
Weiss, "Cemented Prisms for Severe Field Loss", the American Journal of Optometry.
Dang Hung X.
Sikes William L.
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