Progressive addition lenses with an additional zone

Details Progressive addition lenses with an additional zone Progressive addition lenses with an additional zone

2005-05-03

2005-05-03

Sugarman, Scott J. (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

C351S177000

Reexamination Certificate

active

06886938

ABSTRACT:
The invention provides multifocal lenses containing at least four zones of refractive power. The zones are positioned such that the wearer is able to use the inferior-most portion of the lens to clearly view objects at distances more than about 45 cm from the eye.

REFERENCES:
patent: 5112351 (1992-05-01), Christie et al.
patent: 5777716 (1998-07-01), Miura
patent: 5861935 (1999-01-01), Morris et al.
patent: 5864378 (1999-01-01), Portney
patent: 6260966 (2001-07-01), Sawano et al.
patent: 6669337 (2003-12-01), Welk et al.
U.S. patent application Ser. No. 10/440,967, Gupta et al.

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