Multifocal spectacle lens

Details Multifocal spectacle lens Multifocal spectacle lens

2006-04-04

2006-04-04

Mack, Ricky L. (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

C351S168000, C351S171000, C351S172000

Reexamination Certificate

active

07021762

ABSTRACT:
There is provided a multifocal spectacle lens having a front surface and a back surface each of the front surface and the back surface is formed as a multifocal surface or a progressive-power surface, distributions of surface power of the front surface and the back surface being different from each other.

REFERENCES:
patent: 4786160 (1988-11-01), Fürter
patent: 5219497 (1993-06-01), Blum
patent: 5771089 (1998-06-01), Barth
patent: 5864380 (1999-01-01), Umeda
patent: 5926250 (1999-07-01), Mukaiyama et al.
patent: 6412948 (2002-07-01), Yanari
patent: 6230216 (1987-02-01), None
patent: 9719383 (1997-05-01), None

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