Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – With antiglare or shading
Patent
1986-05-08
1988-06-07
Bovernick, Rodney B.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
With antiglare or shading
351 43, 351 62, G02C 100, G02C 716, G02C 1108
Patent
active
047492724
ABSTRACT:
A water-proof optical grid for correcting optical defects comprises an intermediate grid formed by two perpendicularly arranged series of dark and opaque bars integrally connected to each other in order to form an integral network, all of said bars having a triangular cross section with the base of the triangle facing the eyes of the wearer and the vertex away therefrom, whereby to form square openings having their smaller areas facing the eyes and their larger areas away from the eyes, the ratio of said smaller areas to said larger areas being of from 1:36 to 1:2.25, preferably 1:4, said smaller area of each square opening being of from 0.04 to 4 mm.sup.2, preferably 1 mm.sup.2, and said bars being 1 mm wide, said grid being sandwiched between a pair of transparent plates contiguous thereto in order to avoid the entrance of water into said square opening of the grid when the thus formed laminate or sandwich is submerged in water.
REFERENCES:
patent: 4452516 (1984-06-01), Salia
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