Optic zone phase channels

Details Optic zone phase channels Optic zone phase channels

1989-11-20

1991-10-15

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

623 6, 359565, 359571, G02C 704, G02B 518, G02B 2744, A61F 216

Patent

active

050569082

ABSTRACT:
An ophthalmic contact lens with a phase plate and a pure refractive portion within its optic zone. The invention embraces an ophthalmic contact lens of the Cohen lens design with a phase plate and a pure refractive portion within its optic zone.

REFERENCES:
patent: 4637697 (1987-01-01), Freeman
patent: 4881804 (1989-11-01), Cohen
patent: 4895750 (1990-01-01), Swanson et al.

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