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Intraocular lens with expanded depth of focus
专利权人:
TATVUM LLC
发明人:
TIWARI, Nivedan,VENKATESWARAN, Krishnakumar
申请号:
ES17817943
公开号:
ES2768035T3
申请日:
2017.11.15
申请国别(地区):
ES
年份:
2020
代理人:
摘要:
An intraocular lens, comprising an optic having an anterior surface and a posterior surface, providing a refractive base power, at least one of the anterior surface and the posterior surface having disposed thereon a profile comprising steps having heights determined by combining three constituent diffractive profiles. The diffractive profiles correspond to powers p1, p2 and p3, the powers being different than one another and each power being a positive power less than about 1D or about 1.25D. Each of the diffractive profiles having step heights causing a phase delay, relative to aqueous fluid, of 0.6 to 1.2 times 2π for 546 nm light. The combined profile defined by the function: z=max (diffractive profile (p1), diffractive profile (p2), diffractive profile (p3)), where p3>;p2>;p1.
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中国工程科技知识中心
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