Multifocal contact lens

Details Multifocal contact lens Multifocal contact lens

2005-08-16

2005-08-16

Schwartz, Jordan M. (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

C351S177000

Reexamination Certificate

active

06929366

ABSTRACT:
A contact lens has front and rear surfaces, the rear surface having a base curve fits the eye of a wearer. The front surface has a central circular zone which is substantially spherical and which, together with the base curve, generates a central zone power selected so as to correct near vision of the wearer. The front surface also has an annular outer zone which is substantially spherical and which, together with the base curve, generates an outer zone power which is less than the central zone power. The front surface further includes an annular region, intermediate the central and outer zones, having one or more contiguous intermediate annular zones, each of which is substantially spherical. The one or more intermediate annular zones generate respective one or more intermediate zone refractive powers in a monotonic progression of decreasing refractive power from the central zone to the annular outer zone.

REFERENCES:
patent: 5002382 (1991-03-01), Seidner
patent: 5125729 (1992-06-01), Mercure
patent: 5436678 (1995-07-01), Carroll
patent: 5493350 (1996-02-01), Seidner
patent: 5526071 (1996-06-01), Seidner et al.
patent: 5619289 (1997-04-01), Seidner et al.
patent: 5691797 (1997-11-01), Seidner et al.
patent: 5754270 (1998-05-01), Rehse et al.
patent: 5835187 (1998-11-01), Martin
patent: 5864379 (1999-01-01), Dunn
patent: 5898473 (1999-04-01), Seidner et al.
patent: 6030077 (2000-02-01), Sawano et al.
patent: 6116735 (2000-09-01), Wada
patent: 6244709 (2001-06-01), Vayntraub et al.
patent: 6260966 (2001-07-01), Sawano et al.
patent: 6357876 (2002-03-01), Oyama et al.
patent: 6457826 (2002-10-01), Lett
patent: 6540353 (2003-04-01), Dunn
patent: 2002/0036748 (2002-03-01), Chapoy et al.
patent: 2002/0093623 (2002-07-01), Duppstadt
patent: 2002/0186345 (2002-12-01), Duppstadt
patent: 2003/0043342 (2003-03-01), Seidner
patent: 2003/0076478 (2003-04-01), Cox

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