Molds for use in contact lens production

Details Molds for use in contact lens production Molds for use in contact lens production

1999-09-03

2002-09-03

Vargot, Mathieu D. (Department: 1732)

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

C249S117000, C264S001380, C264S002500, C425S808000

Reexamination Certificate

active

06444145

ABSTRACT:

FIELD OF THE INVENTION
The invention relates to molds useful in the manufacture of contact lenses. In particular, the molds of the invention provide for the production of lenses with contoured edges.
BACKGROUND OF THE INVENTION
Methods and molds useful in the manufacture of contact lenses are well known. For example, in U.S. Pat. No. 5,540,410, incorporated herein in its entirety by reference, are disclosed molds and their use in contact lens manufacture. However, the known lens molds are disadvantageous in that they do not permit production of lens edges that are contoured. In particular, a mold for use in the production of a lens having an edge contoured so as to avoid impingement on the lens' wearer's conjunctival membrane is desirable.


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