Progressive multifocal ophthalmic lens pair

Details Progressive multifocal ophthalmic lens pair Progressive multifocal ophthalmic lens pair

1997-04-08

1998-09-22

Epps, Georgia Y.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351168, G02C 706

Patent

active

058122389

ABSTRACT:
In a pair of progressive multifocal ophthalmic lenses, in which each lens has an aspherical surface comprising a far vision portion, a near vision portion, an intermediate vision portion, and a prime meridian of power progression passing through these three portions, the prime meridians of progression of the lenses are substantially symmetrical with respect to each other, and one of the lenses is more particularly dedicated to far vision and the other is more particularly dedicated to near vision, the lens dedicated to far vision having a more extensive far vision portion than the far vision portion of the lens dedicated to near vision, and the lens dedicated to far vision having a less extensive near vision portion than the near vision portion of the lens dedicated to near vision.

REFERENCES:
patent: 3910691 (1975-10-01), Maitenaz
patent: 4640593 (1987-02-01), Shinohara
patent: 4778266 (1988-10-01), Maitenaz
patent: 4946270 (1990-08-01), Guilino et al.
patent: 5123725 (1992-06-01), Winthrop
patent: 5137343 (1992-08-01), Kelch
patent: 5151723 (1992-09-01), Tajiri
patent: 5483304 (1996-01-01), Porat
patent: 5530491 (1996-06-01), Baude et al.

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