Patent ID: 7556375
Filing Date: 2009-07-07
Classification: A61F,G02C

Abstract:
1. A soft contact lens having a diameter of greater than the limbal diameter and formed of a homogenous material having an elastic modulus between 0.2 and 10 MPa, said lens having a generally concave posterior surface for fitting to the eye of a wearer, and a convex anterior surface, the contact lens having mechanical properties and/or a geometric shape such that when the lens is fitted to the eye the pressure applied to the eye by or via the lens will vary in a radial direction between at least one zone of higher pressure and at least one zone of lower pressure, the pressure gradient between said zones, and the location of said zones, being selected so as to cause a dimensional change to the surface layer of the cornea of the eye to thereby at least temporarily cause the refractive state of the eye to change.