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Zonal diffractive trifocal intraocular lenses
专利权人:
发明人:
申请号:
EP11181646.8
公开号:
EP2400339A3
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., trifocal intraocular lenses (80), that employ a central refractive region (18) for providing a refractive focusing power and a diffractive region (20) for providing two diffractive focusing powers. An ophthalmic lens (80), comprises an optic having a central refractive region (82a) for providing a refractive far-focus optical power, a diffractive structure (86) disposed on at least one surface of said optic for providing a diffractive near focusing power and a diffractive intermediate focusing power.
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