Carmen Cánovas Vidal,Hendrik A. Weeber,Patricia Ann Piers
申请号：
US15923911
公开号：
US20180263760A1
申请日:
2018.03.16
申请国别(地区):
US
年份:
2018
代理人:
摘要：
Apparatuses, systems and methods for providing improved ophthalmic lenses, particularly intraocular lenses (IOLs). Exemplary diffractive intraocular implants (IOLs) can include a diffractive profile having multiple diffractive zones. The diffractive zones can include a central zone that includes one or more echelettes and a peripheral zone beyond the central zone having one or more peripheral echelettes. The central diffractive zone can work in a higher diffractive order than a remainder of the diffractive profile. The combination of the central and peripheral zones and an optional intermediate zone provides a longer depth of focus than a diffractive profile defined just by a peripheral and/or optional intermediate zone.
