Patent ID: 6390621
Filing Date: 2002-05-21
Classification: B29D

Abstract:
A method for forming a multifocal lens comprising providing a pair of shaping faces with a hardenable polymeric composition between the pair of shaping faces, a first shaping face of the pair of shaping faces having a convex shaping face that is positioned towards a second shaping face of the pair of shaping faces, the second shaping face having a concave shaping face, each of said shaping faces having a diameter across the shaping face, the diameter of the first shaping face being at least 5% less than the diameter of the second shaping face,positioning the convex shaping face of the first shaping face at a position within the concave shaping face so that neither shaping face is in contact with the other shaping face, yet outer edges of the second shaping face extend from a position in front of the front surface of the first shaping face to a position beyond and behind outer edges of the first shaping face in two dimensions, and hardening said hardenable polymeric composition.