Ophthalmic lenses with diffractive power

Details Ophthalmic lenses with diffractive power Ophthalmic lenses with diffractive power

1985-02-13

1987-04-07

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351160R, 351161, 351172, 623 6, G02C 702, G02C 704, G02C 706, A61F 216

Patent

active

046555650

ABSTRACT:
A contact or spectacle or implant lens has positive diffractive power which introduces negative longitudinal chromatic aberration that more than counteracts, and is preferably greater than twice, the natural positive longitudinal chromatic aberration of the eye. The residual negative longitudinal chromatic aberration enables the eye/brain system to perform tasks by concentrating on the appropriate color component at the different respective distances without need to accommodate.

REFERENCES:
patent: 4210391 (1980-07-01), Cohen
patent: 4338005 (1982-07-01), Cohen
patent: 4340283 (1982-07-01), Cohen

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