US7422710B2 | 合法醫療器材資訊網

Preferably,thelensesaremadebyphotocuringthelenscompositionandapplyingacoatingtothecuredlens.Variousprocessesareknownformoldingthe ...

This patent application is a divisional of U.S. Ser. No. 09/727,874, filed on Dec. 1, 2000 now U.S. Pat. No. 6,861,123.

The present invention relates to molds and mold inserts useful in the production of contact lenses. In particular, the invention provides high optical quality molds and mold inserts for use in the manufacture of silicone hydrogel contact lenses.

The use of soft contact lenses for reasons of cosmetics and for the correction of visual acuity is well known. Typically, these lenses are manufactured by casting. The mold halves used in the casting of the lenses are produced by first machining metallic inserts and then using the inserts to produce the mold halves. The process of machining the inserts may cause periodic defects, or periodic structures, that may be transferred to the mold halves. The molding surfaces o...