Optical device for pre-operative cataract patients

Details Optical device for pre-operative cataract patients Optical device for pre-operative cataract patients

1975-05-23

1977-03-15

Sacher, Paul A.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

With antiglare or shading

351 47, G02C 716, G02C 904

Patent

active

040121291

ABSTRACT:
An optical device especially constructed for preoperative cataract patients comprising an opaque mask attached to spectacle frames or other means for mounting before the eyes. The mask includes a horizontally extending open ended slot providing a transparent area through which the patient's vision is unobstructed. The mask further includes an array of separate transparent areas disposed below the slotted opening. The size and positioning of these areas are interrelated with the slotted opening to provide an increased vertical field of vision while restricting the light striking the patient's eye to a minimum.

REFERENCES:
patent: 1959915 (1934-05-01), Guthrie
patent: 2413193 (1946-12-01), Robblee
patent: 3171134 (1965-03-01), Kennedy

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