US 12,465,482 B2
Diffractive intraocular lenses for extended range of vision
Carmen Cánovas Vidal, Groningen (NL); Hendrik A. Weeber, Groningen (NL); and Patricia Ann Piers, Groningen (NL)
Assigned to AMO Groningen B.V., Groningen (NL)
Filed by AMO GRONINGEN B.V., Groningen (NL)
Filed on Nov. 4, 2022, as Appl. No. 18/052,853.
Application 18/052,853 is a division of application No. 15/923,911, filed on Mar. 16, 2018, granted, now 11,497,599.
Claims priority of provisional application 62/473,200, filed on Mar. 17, 2017.
Prior Publication US 2023/0190450 A1, Jun. 22, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 2/16 (2006.01); G02C 7/04 (2006.01); A61F 2/14 (2006.01)
CPC A61F 2/1629 (2013.01) [A61F 2/1618 (2013.01); A61F 2/164 (2015.04); A61F 2/1645 (2015.04); A61F 2/1654 (2013.01); A61F 2/1656 (2013.01); G02C 7/042 (2013.01); G02C 7/044 (2013.01); A61F 2/1451 (2015.04); A61F 2/1602 (2013.01); A61F 2240/001 (2013.01); G02C 2202/20 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An ophthalmic lens, comprising:
a first surface and a second surface disposed about an optical axis, the lens being characterized by an extended depth of focus across a range of optical powers; and
a diffractive profile imposed on one of the first and second surfaces and configured to cause a distribution of non-negligible amounts of light to the extended depth of focus, the diffractive profile comprising:
a central zone comprising at least two central diffractive echelettes having a first phase delay;
a peripheral zone comprising one or more peripheral diffractive echelettes having a second phase delay less than the first phase delay; and
an intermediate zone comprising at least one intermediate echelette having a third phase delay that is different than the first phase delay of the central zone and the second phase delay of the peripheral zone, wherein
the central zone operates in a higher diffractive order than the peripheral zone; and
the combination of the central and peripheral zones provides a longer depth of focus than a diffractive profile defined just by the peripheral zone.