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ZONAL DIFFRACTIVE TRIFOCAL INTRAOCULAR LENSES
专利权人:
发明人:
申请号:
HK12103252.3
公开号:
HK1162687A
申请日:
2012.04.02
申请国别(地区):
HK
年份:
2012
代理人:
摘要:
The present invention generally provides multifocal ophthalmic lenses, e.g., multifocal intraocular lenses, that employ a central refractive region for providing a refractive focusing power and a diffractive region for providing two diffractive focusing powers. In many cases, the refractive focusing power provided by the lenss central region corresponds to a far-focusing power that is substantially equal to one of the diffractive focusing powers while the other diffractive power corresponds to a near-focusing power. As such, in many cases, the focusing properties of the lenses are dominated by the far-focus ability, especially for small pupil sizes.
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中国工程科技知识中心
来源网址:
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