Method for molding plastic lenses

摘要

The method for making an optical lens which includes:filling a molding cavity vertically oriented and defined by two mold pieces at the periphery of which is disposed an annular closure member with a polymerizable synthetic composition through a disposable check valve provided in the closure member;polymerizing the composition to form the lens; andrecovering the lens with the disposable check valve imprisoned within the polymerized composition at the periphery thereof.