Bausch-lomb Incorporated

Other

Judith E Chapman

Ian G Cox

Graham W Biddle

Kevin Jacob DeRyke

Timothy L Comstock

Paul M Erickson

Kevin J Deryke

A method for obtaining contact lenses having optimized visual acuity involves providing the anterior surface or the posterior surface of the contact lens with a conic section having a shape factor value within the range of about 0.3 to 2.0, the shape factor value being selected so as to adjust spherical aberration in the central optical zone to a value within the range of about &minus;0.2 diopter to about &minus;0.6 diopter and to a value that provides optimal visual acuity.

Contact lenses providing improved visual acuity

A toric contact lens includes a posterior surface and an anterior surface, one of these surfaces including a toric optical zone, and these surfaces being shaped to form a ballast. A diameter of the posterior optical zone and a diameter of the anterior optical zone are selected to minimize thickness of the lens based on the cylindrical correction of the lens.

Toric contact lenses

A contact lens includes an anterior surface and a posterior surface where the posterior surface includes a central zone and a peripheral zone, where the radius of curvature of the central zone is at least 0.4 mm, and preferably at least 0.6 mm, greater than the radius of curvature of the peripheral zone.

Contact lens design

A method for obtaining contact lenses having optimized visual acuity involves providing the anterior surface or the posterior surface of the contact lens with a conic section having a shape factor value within the range of about 0.3 to 2.0, the shape factor value being selected so as to adjust spherical aberration in the central optical zone to a value within the range of about -0.2 diopter to about -0.6 diopter and to a value that provides optimal visual acuity.

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Victor, NY, United States of America

Judith E Chapman