Bausch-lomb Incorporated

Horngyih Huang

Dominic V Ruscio

Hongwen Li

Yu Chin Lai

Ian G Cox

Griffith E Altmann

Michael A Lesczynski

Kevin D Beebe

Arthur W Martin

Michelle L Moran

Joseph Papalia

Lisa A Armstrong

This invention relates to the preparation of molds for the production of contact lenses and other ophthalmic articles. By using an inorganic material to coat the optical surfaces and sidewalls of mold parts made from clear-resin materials, manufacturers can produce lens molds with greater dimensional stability and chemical resistance. In addition to protecting the clear resin from interaction with otherwise reactive monomers from which the molded article is made, such coatings can also be used to achieve preferential release of the molded article. The resulting mold is especially useful for providing an economical way to improve manufacturing quality of contact lenses.

Lens molds with protective coatings for production of contact lenses and other ophthalmic products

A method and mold assembly to control the polymerization of a molded article. In one embodiment, an amorphous posterior mold comprising a non-critical surface having a controlled radius of curvature is used to produce molded articles. In an alternate embodiment, ophthalmic lenses are produced using a posterior mold in which the concave surface of the non-critical surface is filled with a liquid having a similar refractive index as the mold material. In still another embodiment, a positive lens is placed at a predetermined distance adjacent to the mold assembly to alter the irradiation path to the mold assembly. In still another embodiment, a positive lens is placed within the concave surface of the posterior lens.

Methods and devices to control polymerization

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Penfield, NY, United States of America

Horngyih Huang