| 摘要 |
A contact lens for use on a patient's eye with an asymmetric aspheric cornea, the lens having an anterior surface, a posterior surface and a base, the posterior surface having a peripheral portion which is asymmetric and aspherical and at least coextensive with the base of the lens. The peripheral portion asymmetrically and aspherically matching a corresponding peripheral portion of the cornea which lies under the peripheral portion of the lens when the lens is worn in the patient's eye. The contact lens is not substantially greater in diameter than said cornea. The process for manufacturing the lens uses three-dimensional topographic data (including elevation data) from a multiplicity of points on the cornea. The data is used to shape at least the peripheral portion of the posterior surface of the lens to cause it to conform to and/or match the corresponding surface of the cornea. |
