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MULTIZONAL LENS WITH EXTENDED DEPTH OF FOCUS
专利权人:
发明人:
申请号:
EP09785909.4
公开号:
EP2403429A1
申请日:
2009.03.05
申请国别(地区):
EP
年份:
2012
代理人:
摘要:
An intraocular lens for providing enhanced vision includes an optic having a clear aperture having an outer diameter. The optic has opposing first and second surfaces disposed about an optical axis, the first surface including a cross- sectional profile. The optic further includes central and outer zones that fill the entire clear aperture of the optic. The central zone is disposed about the optical axis having an outer diameter, the profile in the vicinity of the central zone having a constant radius of curvature or a radius of curvature that increases with increasing radius from the optical axis. The outer zone is disposed about the central zone, the profile in the outer zone having a base curvature with a base radius of curvature and a center of curvature, the profile in the outer zone characterized in that, as the distance from the optical axis increases, the distance from the center of curvature of the base curvature also increases.
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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