Biofocal type ophthalmic lens alignment determining device

Details Biofocal type ophthalmic lens alignment determining device Biofocal type ophthalmic lens alignment determining device

1977-10-19

1980-04-08

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Folding

33200, A61B 310

Patent

active

041969782

ABSTRACT:
In abstract a preferred embodiment of this invention is a biofocal type ophthalmic lens alignment determining device wherein the alignment of the biofocal segment lines can be comparatively read. This invention incorporates alignment platform and a light source which projects a specially designed grid network onto a viewing screen to read and thus allow adjustment of the biofocal segment lines, the binocular pupillary distance, and the monocular pupillary distance.

REFERENCES:
patent: 2414871 (1947-01-01), Harper
patent: 3737238 (1973-06-01), Reiner et al.

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