Multipocal contact lens and method for preparing

Details Multipocal contact lens and method for preparing Multipocal contact lens and method for preparing

1993-08-25

1996-02-20

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351177, G02C 704

Patent

active

054933501

ABSTRACT:
A multifocal contact lens customized for a patient includes a central portion having a concave aspherical posterior surface of a standardized eccentricity and an annular portion connected to the central portion. The central portion also has a convex anterior surface with a power curve customized to the patient. The annular portion is provided with an aspheric annular cornea-fitting posterior surface and has an outer edge with a centralized apex, whereby the annular portion may be formed at the outer edge to be entrainable by a patient's eyelid to shift the lens relative to the patient's eye to vary which portion of the power curve is used during vision. The contact lenses according to the invention may be rigid or soft (hydrogels).

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patent: 4418991 (1983-12-01), Breger
patent: 4525043 (1985-06-01), Bronstein
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patent: 4936672 (1990-06-01), Capez
patent: 4971432 (1990-11-01), Koeniger
patent: 5181053 (1993-01-01), Brown

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