REUSABLE CASTINGS MOLDS AND METHOD OF MAKING SUCH MOLDS

摘要

The invention is directed to a reusable mold (1) for making a contact lens and the reusable mold has at least one of the mold halves (11, 12) is made from an oxide glass having a Knoop Hardness less than HK 350. The invention is also directed to a method for making an optical part by single point diamond turning an oxide glass having a Knoop Hardness HK less than 350.