Patent ID: 6105925
Filing Date: 2000-08-22
Classification: B29D,G02C,Y10S

Abstract:
A mold for making a progressive plastic eyeglass lens with a front face, a back face, a near vision correction zone, a far vision correction zone, and a vision transition zone between the near vision correction zone and the far vision correction zone, comprising:a back face configured to cast the front face of the lens, and comprising (1) a centrally located concave surface having a near vision correction zone adapted to cast the near vision correction zone of the lens, a far vision correction zone adapted to cast the far vision correction zone of the lens, and a vision transition zone adapted to cast the vision transition zone of the lens; and (2) an annular surface which tapers at an angle from the edges of the back face to the edges of the concave surface in the back face;a front face; andside surfaces connecting the front face to the back face.