Monovision corneal contact lenses

Details Monovision corneal contact lenses Monovision corneal contact lenses

1989-12-07

1991-06-18

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

G02C 704

Patent

active

050245171

ABSTRACT:
In monovision type corneal contact lenses, one or both lenses is provided with one or more auxiliary correction zones each having a focal length different from the focal length of the major portion of the respective lenses. In any lens in accordance with the invention, the portion of the principal correction zones coextensive with the pupil of the respective eye covers more than approximately two-thirds (more preferably seventy-five percent and most preferably eighty percent) of the area of the pupil. This upper limit on the pupil area covered by the auxiliary zones is satisfied regardless of the disposition of the respective contact lens on the eye and regardless of the size of the respective pupil.

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