Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Folding
Patent
1975-06-09
1977-08-30
Sacher, Paul A.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Folding
351 36, A61B 302
Patent
active
040451305
ABSTRACT:
A perimetric testing apparatus is described for use in testing the field of vision of human eyes. This apparatus includes an approximately hemispherical shell together with a device for projecting successive light pattern groups onto the inner surface of the shell. The device includes shadow masks, representative of different light pattern groups, which may be selectively inserted into the light path of a light source projector. The apparatus may be used in a dynamic perimeter.
REFERENCES:
patent: 3284154 (1966-11-01), Friedmann
patent: 3300269 (1967-01-01), Schultz
patent: 3416857 (1968-12-01), Lookabaugh
patent: 3421498 (1969-01-01), Gans
patent: 3664732 (1972-05-01), Lynn
Optische Werke G. Rodenstock
Sacher Paul A.
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