Multifocal ophthalmic lens

Details Multifocal ophthalmic lens Multifocal ophthalmic lens

1998-07-17

1999-09-07

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

G02C 706

Patent

active

059495197

ABSTRACT:
A multifocal ophthalmic lens comprising a far vision region, a near vision region and an intermediate vision region is provided having a high near vision region and a wide vision field in the near vision region, the intermediate vision region and in the far vision region. Progression is gentle although the distance between a mounting center on the lens and the point where power addition is 85% higher than power addition at a far vision control point is less than 16 mm, while simultaneously maximum cylinder inside a 20 mm radius circle centered on a geometrical center of the lens is kept at a low value.

REFERENCES:
patent: 5270745 (1993-12-01), Pedrono
patent: 5488442 (1996-01-01), Harsigny et al.
patent: 5719658 (1998-02-01), Ahsbahs et al.
Guilino, Applied Optics, "Design Philosophy for Progressive Addition Lenses", 32:1:111-117, Jan. 1, 1993.

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