Multifocal multizone diffractive ophthalmic lenses

Details Multifocal multizone diffractive ophthalmic lenses Multifocal multizone diffractive ophthalmic lenses

1990-05-14

1992-03-17

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

623 6, G02C 704, A61F 216

Patent

active

050962850

ABSTRACT:
Multifocal lenses for improving vision are disclosed. The lenses of the present invention use at least one diffractive zone located in a defined portion of the surface of a refractive lens to achieve highly efficient multifocal vision by providing nearly 100% efficiency in the +1 diffractive order. The lenses disclosed may be used for both contact lenses and intraocular lens as well as other vision correcting applications.

REFERENCES:
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patent: 4636211 (1987-01-01), Nielsen et al.
patent: 4637697 (1987-01-01), Freeman
patent: 4642112 (1987-02-01), Freeman
patent: 4813955 (1989-03-01), Achatz et al.
patent: 4881804 (1989-11-01), Cohen
patent: 4923296 (1990-05-01), Erickson

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