Patent ID: 9709822
Date: 2017-07-18
CPC Classifications: G02C

Claim:
1. A contact lens for application in practice of orthokeratology on an eye, comprising: a curved shell having a concave surface and a convex surface, the concave surface including a carrier zone and a back shaping zone, the back shaping zone having a first spherical curvature and the carrier zone having at least one second spherical curvature; the curved shell having a geometric center and the back shaping zone having a shaping zone center; the back shaping zone center being offset peripherally from the geometric center; the curved shell having an overall diameter that approximates a corneal limbal diameter of the eye to which the contact lens is to be applied; wherein the at least one second curvature further comprises a second curve and the second curve is centered on the geometric center and wherein the second curve is located immediately peripheral to the back shaping zone; wherein the curved shell defines structures that stabilize rotation of the contact lens relative the eye; and wherein the structures that stabilize rotation relative the eye are located on the convex surface of the contact lens.