US 12,251,302 B2
Full depth of focus intraocular lens
Yueai Liu, Arlington, TX (US)
Assigned to Alcon Inc., Fribourg (CH)
Filed by Alcon Inc., Fribourg (CH)
Filed on Jul. 24, 2023, as Appl. No. 18/357,441.
Application 18/357,441 is a continuation of application No. 16/381,359, filed on Apr. 11, 2019, granted, now 11,751,990.
Claims priority of provisional application 62/656,400, filed on Apr. 12, 2018.
Prior Publication US 2024/0000561 A1, Jan. 4, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 2/16 (2006.01)
CPC A61F 2/1618 (2013.01) [A61F 2/1621 (2013.01); A61F 2/1654 (2013.01); A61F 2002/1683 (2013.01)] 8 Claims
OG exemplary drawing
 
1. An intraocular lens comprising:
an anterior optical surface and a posterior optical surface, at least one of the anterior optical surface and the posterior optical surface including a first surface region corresponding to a photopic aperture of a pupil and a second surface region corresponding to a difference between the photopic aperture and a mesopic aperture of the pupil;
a first microstructure pattern formed in the first surface region, the first microstructure pattern introducing a phase perturbation into an optical path of incoming light such that a full depth of focus for photopic vision is provided, the first microstructure pattern defined by a first step pattern; and
a second microstructure pattern formed in the second surface region, the second microstructure pattern configured to provide trifocal vision in the mesopic aperture, wherein:
the second microstructure pattern is defined by a second step pattern different from the first step pattern, the second step pattern comprising a first step having a first step height, a second step adjacent to the first step in a given direction and having a second step height, and a third step adjacent to the second step in the given direction and having a third step height;
the first, second, and third step heights are different from each other such that either:
the second step height is greater than both the first step height and the third step height; or
the second step height is less than both the first step height and the third step height.