发明授权
- 专利标题: Contact lens
- 专利标题(中): 隐形眼镜
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申请号: US186674申请日: 1988-04-21
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公开(公告)号: US5069542A公开(公告)日: 1991-12-03
- 发明人: Peter Hofer , Ulrich Muller , Manfred Barenz , Horst Schafer , Wolfgang Muller-Lierheim
- 申请人: Peter Hofer , Ulrich Muller , Manfred Barenz , Horst Schafer , Wolfgang Muller-Lierheim
- 申请人地址: DEX Aschaffenburg
- 专利权人: Titmus Eurocon Kontaktlinsen GmbH & Co. KG.
- 当前专利权人: Titmus Eurocon Kontaktlinsen GmbH & Co. KG.
- 当前专利权人地址: DEX Aschaffenburg
- 优先权: DEX3002664 19800125
- 主分类号: G02C7/04
- IPC分类号: G02C7/04
摘要:
A contact lens has an elliptical inside surface with a numerical eccentricity of 0.2 to 0.5 and a zenith radius of curvature of 8.0 to 8.4 mm. The inside surface preferably has a peripheral, circularly cross sectioned bevelled zone. As a soft contact lens, it has these dimensions when fully hydrated and preferably consists of a copolymer comprising of 50% to 90% hydroxyethyl-methacrylate (HEMA) by weight, 2% to 20% one or more unsaturated carboxylic acids, 2% to 20% one or more base monomers, 5% to 25% aliphatic acrylate or methacrylate, and 0.1% to 1% of a dialkylene-glycol-dimethacrylate cross-linker.
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