Patent ID: 6652095
Filing Date: 2003-11-25
Classification: A61F,G02C

Abstract:
An orthokeratology contact lens for a patient's cornea, comprising:an optical zone (20) having a curvature defined by a base curve (30), said base curve being steeper than a measured curvature (12) of a central portion of said cornea; a plateau zone (22) coupled to said optical zone and extending radially therefrom, said plateau zone having a curvature defined by a plateau curve (34), said plateau curve being flatter than said base curve (30); a fitting zone (24) coupled to said plateau zone and extending radially therefrom, said fitting zone having a curvature defined by a fitting curve (36), said fitting curve being steeper than said plateau curve; an alignment zone (26) coupled to said fitting zone and extending radially therefrom, said alignment zone having a curvature defined by an alignment curve (38), said alignment curve being flatter than said fitting curve; a peripheral zone (28) coupled to said alignment zone and extending radially therefrom, said peripheral zone having a curvature defined by a peripheral curve (42), said peripheral zone forming an edge lift to act as tear reservoir.