Patent ID: 6242065
Filing Date: 2001-06-05
Classification: B29C,B29D,B29L,G02C,Y10T

Abstract:
A pair of ophthalmic lens blanks comprising a front lens blank and a rear lens blank nested against each other with a liquid, photocurable adhesive between said front lens blank and said rear lens blank, at least one of said front lens blank and said rear lens blank having topography above a surface of at least one of said lens blanks and on a surface of one of said lens blanks which prevents the other of said lens blanks from slipping out of nesting contact with said at least one of said lens blanks wherein said topography is selected from the group consisting of: a) at least two protrusions extending from a concave surface of one of said lens blanks, the other of said lens blanks nesting within said concave surface, said at least two protrusions extending high enough from said concave surface to make contact with an edge of said other lens blank nesting within said concave surface; and b) protrusions extending away from a convex side of one of said lens blanks and over an edge of said other lens blank nested against said convex side.