US 12,303,381 B2
Quint-focal diffractive intraocular lens
Yueai Liu, Ontario (CA)
Appl. No. 17/312,792
Filed by AAREN SCIENTIFIC INC., Ontario (CA)
PCT Filed Feb. 20, 2020, PCT No. PCT/US2020/019129
§ 371(c)(1), (2) Date Jun. 10, 2021,
PCT Pub. No. WO2020/132703, PCT Pub. Date Jun. 25, 2020.
Claims priority of provisional application 62/783,175, filed on Dec. 20, 2018.
Prior Publication US 2022/0133469 A1, May 5, 2022
Int. Cl. A61F 2/16 (2006.01)
CPC A61F 2/1654 (2013.01) [A61F 2/1618 (2013.01)] 5 Claims
OG exemplary drawing
 
1. An intraocular lens comprising:
a lens having an anterior surface and a posterior surface and
a diffractive profile disposed on at least one of the anterior surface and the posterior surface, the diffractive profile
comprising one or more annular zones about the optical axis of the lens, where each annular zone having four annular subzones, where each annular subzone comprises a diffractive step, the annular zones radiating from the optical axis of the lens to some radius RD on the lens;
configured to produce constructive interference in at least five consecutive diffractive orders within a range of vision, the five consecutive diffractive orders including a lowest diffractive order, an extended intermediate diffractive order, an intermediate diffractive order, an extended near diffractive order, and a highest diffractive order, wherein: the highest diffractive order corresponds to a near focus for near vision, a lowest diffractive order corresponds to a distance focus for distance vision, the extended intermediate diffractive order corresponds to an extended intermediate focal point, the intermediate diffractive order corresponds to an intermediate focal point, and the extended near diffractive order corresponds to an extended near focal point; and
having an Optical Path Difference (OPD) described with the following formula:

OG Complex Work Unit Math
ADD is the desired additional power at the highest diffractive order and n is an integer.