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.
