Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1995-07-03
1997-03-04
Sugarman, Scott J.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
351160H, 351176, G02C 704
Patent
active
056084714
ABSTRACT:
A soft contact lens having the ability to make bifocal corrections can be made by the conjunctive use of lens elements comprising: an annular main body portion having a concave, eye-contacting, posterior surface and a non-continuous, convex, anterior surface having a near vision-aiding add zone, a transition zone, a far vision-aiding zone and a slab-off system and wherein: (a) the near vision-aiding add zone has a diameter of from about 1.5 mm to about 3.5, (b) the transition zone has a base length of from about 0.03 mm to about 0.20 and (c) a slope angle of from about 15.degree. to about 40.degree.. Such lenses also can be used to correct astigmatisms by providing their posterior surface with a toric optic zone.
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Schwartz Jordan M.
Sugarman Scott J.
Westcon Contact Lens Co., Inc.
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