| 摘要 |
PURPOSE:To obtain a low-cost contact lens having a smooth edge shape and surface and corresponding to a lens specification of a different shape by a method wherein a male mold is made of a resin having a low molding shrinkage, a female mold is made of a transparent resin, a monomer is charged between the molds, and after the monomer is photopolymerized, the female mold side of the molded piece is cut. CONSTITUTION:As a male mold having a BC surface, a resin having a low molding shrinkage in volume and realizing a sufficient profile irregularity is used: for example, polyamide, ethylene-polyvinyl alcohol copolymer, polyacetal, or amorphous polyolefin. An attachment 4 to be mounted on a lens cutting lathe is provided. As a female mold having an FC surface, a resin having a sufficient transparency is used: for example, polyolefin, polycarbonate, styrene, or acrylic resin. A polymerizable monomer is charged into a cavity 7. After the monomer is photopolymerized by being irradiated with a light from the female mold side, the molded piece fitted with the molds intact or removed from the female mold is mounted on the lens cutting lathe and cut on its FC side. |
