Rigid gas permeable contact lens with 3-part curvature

Details Rigid gas permeable contact lens with 3-part curvature Rigid gas permeable contact lens with 3-part curvature

2006-08-29

2006-08-29

Schwartz, Jordan M. (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

C351S16000R

Reexamination Certificate

active

07097302

ABSTRACT:
A contact lens for wearing on a patient's eye comprises an anterior surface adapted to face away from the eye and a posterior surface adapted to face toward the eye. The posterior surface has an optical zone disposed in the center of the lens, a secondary zone coupled to the optical zone and extending radially therefrom, and a peripheral zone coupled to the secondary zone and extending radially therefrom. The curve of the optical zone is spherical and rearwardly concave, the curve of the secondary zone is aspheric and rearwardly concave, and the curve of the peripheral zone is spherical and rearwardly concave.

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George E. Garcia, M.D.; “Contact Lens Fitting in Keratoconus and Following Keratoplasty”: Corneal Disorders, Clinical Diagnosis and Management: 1984; p. 682; W.B. Saunders Company: Philadelphia, PA, USA.

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