Rigid contact lens

Details Rigid contact lens Rigid contact lens

2006-08-23

2010-06-15

Stultz, Jessica T (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

C351S161000, C351S16000R, C351S159000

Reexamination Certificate

active

07735997

ABSTRACT:
A rigid contact lens is provided for correcting an irregularly curved cornea, comprising a front surface (2) and a rear surface which consists of (3) a central optical zone (4) and a peripheral zone (5). The central optical zone (4) has such an aspherical rotationally symmetric or non-rotationally symmetric design that, with equal central curvature radius in the center (Z) of the central optical zone (4), the sagittal depth (Sellip) of the central optical zone (4) is increased as compared with a spherical optical zone.

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patent: 5695509 (1997-12-01), El Hage
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patent: 6599285 (2003-07-01), Lieberman et al.
patent: 2002/0159025 (2002-10-01), Legerton et al.
patent: 2003/0175259 (2003-09-01), Karageozian et al.
patent: 2004/0257524 (2004-12-01), Tung
patent: WO 9507487 (1995-03-01), None

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