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发明名称
Multifocal contact lens
摘要
A multifocal ophthalmic lens has a spiral-like pattern on its surface in an area overlying the cornea of a wearer of the lens. The spiral-like pattern is capable of providing a plurality of different dioptric powers. <IMAGE>
申请公布号
ZA9402807(B)
申请公布日期
1994.10.27
申请号
ZA19940002807
申请日期
1994.04.22
申请人
CIBA-GEIGY A.G.
发明人
XIAOXIAO ZHANG
分类号
A61L27/00;G02B3/10;G02B5/18;G02C7/04;G02C7/06
主分类号
A61L27/00
代理机构
代理人
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