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Diffractive multifocal intraocular lens with modified central distance zone
专利权人:
Alcon; Inc.
发明人:
Simpson, Michael,Venkateswaran, Krishnakumar
申请号:
AU2009316661
公开号:
AU2009316661B2
申请日:
2009.11.19
申请国别(地区):
AU
年份:
2013
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 diffractive focusing powers. The refractive focusing power provided by the lens's 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. The far-focusing power can be enhanced by changes to the phase of the central refractive region and/or changes to the curvature of the central refractive region.
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