Optics: eye examining – vision testing and correcting – Spectacles and eyeglasses – Ophthalmic lenses or blanks
Patent
1996-11-15
1998-09-22
Font, Frank G.
Optics: eye examining, vision testing and correcting
Spectacles and eyeglasses
Ophthalmic lenses or blanks
G02C 704
Patent
active
058122362
ABSTRACT:
A pair of multifocal contact lenses customized for a patient. A first corneal contact lens and a second corneal contact lens each have an anterior side with a power curve defined in part by (i) a central surface, (ii) an inner annular surface contiguous with the central surface, (iii) a second annular surface contiguous along a radially inner periphery with the inner annular surface, and, optionally, (iv) an outer annular surface contiguous along a radially inner periphery with the second annular surface. Each of the annular surfaces is concentric or coaxial with the central surface. The central surface corresponds to a distance vision correction zone, the second annular surface to a near vision correction zone, and the outer annular surface to a distant vision correction zone. The inner annular surface of the first corneal contact lens corresponds to a long intermediate vision correction zone, while the inner annular surface of the second corneal contact lens corresponds to a short intermediate vision correction zone. To that end, the inner annular surface of the first corneal contact lens and the inner annular surface of the second corneal contact lens have substantially different optical powers.
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Poster Maurice
Seidner Leonard
Coleman Henry D.
Font Frank G.
Permeable Technologies, Inc.
Sudol R. Neil
Vierra-Eisenberg Jason D.
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