发明授权
- 专利标题： Gas permeable hard contact lens and method of producing it
- 专利标题（中）： 透气性硬隐形眼镜及其制造方法
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申请号： US09462515申请日： 2000-01-14
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公开(公告)号： US06352343B1公开(公告)日： 2002-03-05
- 发明人: Kikuo Mitomo , Tohru Shirafuji , Hideo Suda , Teruhisa Shimizu , Yuichi Yokoyama
- 申请人： Kikuo Mitomo , Tohru Shirafuji , Hideo Suda , Teruhisa Shimizu , Yuichi Yokoyama
- 优先权： JP10-126458 19980508
- 主分类号： G02C702
- IPC分类号： G02C702
摘要：
Gas-permeable hard contact lenses are produced by hot press-stretching a crosslined gas-permeable hard contact lens material and then machining the press-stretched material. The gas-permeable hard contact lenses are formed from a crosslinked gas permeable hard contact lens material which is hot press-stretched to have a compression ration of 5 to 50% and a compression-flexure fracture strength of 300 to 1,500 g. Efficiently produced gas-permeable hard contact lenses are produced which are free of optical strains, excellent in transparency, small internal stress and comfortable to wear with improved durability strength.