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LENTILLE INTRAOCULAIRE MULTIFOCALE DIFFRACTIVE AVEC ZONE DE DISTANCE CENTRALE MODIFIEE
专利权人:
ALCON; INC.
发明人:
SIMPSON, MICHAEL,VENKATESWARAN, KRISHNAKUMAR
申请号:
CA2741193
公开号:
CA2741193C
申请日:
2009.11.19
申请国别(地区):
CA
年份:
2015
代理人:
摘要:
The present invention generallyprovides multifocal ophthalmic lenses, e.g., multifocalintraocular lenses, that employ a central refractiveregion for providing a refractive focusingpower and a diffractive region for providingdiffractive focusing powers. The refractive focusingpower provided by the lens's central regioncorresponds to a far-focusing power that issubstantially equal to one of the diffractive focusingpowers while the other diffractive power correspondsto a near-focusing power. The far-focusingpower can be enhanced by changes to thephase of the central refractive region and/orchanges to the curvature of the central refractiveregion.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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