US 7,556,375 B2
	Soft lens orthokeratology
Patrick Joseph Caroline, Lake Oswego, Oreg. (US); Peter Donald Bergenske, Hillsboro, Oreg. (US); Jennifer Denise Choo, Burnaby (Canada); Stacy Sanaz Aboutalebi, Pleasant Hill, Calif. (US); Simon Rodney Evans, Botany (Australia); Arthur Ho, Clovelly (Australia); Eric Basil Papaspiliotopoulos, Paddington (Australia); and Brien Anthony Holden, Kingsford (Australia)
Assigned to The Institute for Eye Research, Sydney, New South Wales (Australia)
Appl. No. 10/551,884 PCT Filed Aug. 27, 2004, PCT No. PCT/AU2004/001156 § 371(c)(1), (2), (4) Date Feb. 06, 2007, PCT Pub. No. WO2005/022242, PCT Pub. Date Mar. 10, 2005.
Claims priority of provisional application 60/498423, filed on Aug. 27, 2003.
Prior Publication US 2007/0216859 A1, Sep. 20, 2007
Int. Cl. G02C 7/04 (2006.01)

U.S. Cl. 351—160H  [351/160 R; 351/161]

13 Claims

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.