Multifocal diffractive ophthalmic lenses

Details Multifocal diffractive ophthalmic lenses Multifocal diffractive ophthalmic lenses

1990-08-08

1993-07-20

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351168, 359565, 359570, 359571, 623 6, G02C 704, G02B 2744, A61F 216

Patent

active

052297977

ABSTRACT:
A lens according to the invention has diffractive power and two primary foci, where one focus is associated with the first diffractive order and one with the second diffractive order.

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