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Zonal diffractive multifocal intraocular lenses
专利权人:
发明人:
申请号:
EP11185333.9
公开号:
EP2407816A1
申请日:
2008.10.01
申请国别(地区):
EP
年份:
2012
代理人:
摘要:
The present invention generally provides multifocal ophthalmic lenses, e.g., multifocal intraocular lenses (10), that employ a central refractive region (18) for providing a single far focus refractive focusing power and an annular diffractive region (20) 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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