发明名称 |
Progressive addition lenses |
摘要 |
The invention provides progressive addition lenses in which lens unwanted astigmatism is reduced and channel width through the intermediate and near vision zones is increased as compared to conventional progressive addition lenses. This result is achieved by combining two or more progressive addition surfaces, which surfaces in combination provide the dioptric add power of the lens.
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申请公布号 |
US6149271(A) |
申请公布日期 |
2000.11.21 |
申请号 |
US19980178471 |
申请日期 |
1998.10.23 |
申请人 |
INNOTECH, INC. |
发明人 |
MENEZES, EDGAR V.;MERRITT, JAMES S.;KOKONASKI, WILLIAM |
分类号 |
G02C7/06;A61F2/14;B29D11/00;G02B3/10;G02C7/02;G02C7/04;(IPC1-7):G02C7/06 |
主分类号 |
G02C7/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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