Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – With antiglare or shading
Patent
1992-06-10
1995-04-18
Shafer, Ricky D.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
With antiglare or shading
351163, 351165, 359464, G02C 710
Patent
active
054082781
ABSTRACT:
Specially balanced and integrated lens pairs, one lens allowing transmission of light predominately from the shorter half of the visible spectrum (400 to 550 nm.) and the other lens allowing transmission of light predominately from the longer half of the visual spectrum (from 550 to 750 nm.), are used to subtract specific quantities of selected visible light from the ambient input into each of the two eyes. This lens pair improves visual discrimination for normal individuals and augments color perception in color-deficient individuals.
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patent: 1745107 (1927-09-01), Mendoza
patent: 2136303 (1938-11-01), Lumiere
patent: 3432220 (1969-03-01), Schreiner
patent: 3591263 (1971-07-01), Esterson
patent: 3701590 (1972-10-01), Zeltzer
patent: 3877797 (1975-04-01), Thornton, Jr.
patent: 3963330 (1976-06-01), Boniuk
patent: 4247177 (1981-01-01), Marks et al.
patent: 4836647 (1989-06-01), Beard
Coblentz et al; "Spectral-Transmissive Properties And Use Of Colored Eye-Protective Glasses", Circular Of The National Bureau Of Standards, Jun. 1938, pp. 1-28.
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