Patent ID: 6250757
Filing Date: 2001-06-26
Classification: A61F,G02C

Abstract:
A first and a second contact lens for a lens wearer, the first lens comprising a birefringent material and a first convex and a first concave surface, the first convex surface comprising an optic zone comprising substantially all of the distance optical power and the first concave surface comprising an optic zone of at least two concentric, annular portions, the power of each of the at least two annular portions substantially equal to that of the distance optical power, and the second lens comprising a birefringent material and a second convex and a second concave surface, the second convex surface comprising an optic zone comprising substantially all of the near optical power and the second concave surface comprising an optic zone of at least two concentric, annular portions, the power of each of the at least two annular portions substantially equal to that of the near optical power.