US 11,903,819 B2
Ophthalmic lenses having an extended depth of focus for improving intermediate vision
Myoung-Taek Choi, Arlington, TX (US); Sangyeol Lee, North Richland Hills, TX (US); Shinwook Lee, Arlington, TX (US); and Wangkuen Lee, Arlington, TX (US)
Assigned to Alcon Inc., Fribourg (CH)
Filed by Alcon Inc., Fribourg (CH)
Filed on Apr. 15, 2021, as Appl. No. 17/231,374.
Claims priority of provisional application 63/010,792, filed on Apr. 16, 2020.
Prior Publication US 2021/0330452 A1, Oct. 28, 2021
Int. Cl. A61F 2/16 (2006.01)
CPC A61F 2/1627 (2013.01) [A61F 2/164 (2015.04); A61F 2/1616 (2013.01); A61F 2/1632 (2013.01)] 30 Claims
OG exemplary drawing
 
1. An ophthalmic lens, comprising:
an optic having an anterior surface and a posterior surface disposed about an optical axis, at least one of the anterior and posterior surfaces having a composite multi-layered surface profile corresponding to a superposition of at least three profiles comprising a phase shift structure, a zonal structure, and a base structure:
the phase shift structure characterized by an inner region, an outer region, and a transition region, wherein,
the inner region extends radially from the optical axis to a first boundary;
the transition region is disposed between the inner region and the outer region and extends radially from the first boundary to a second boundary, wherein the transition region is adapted such that a phase of radiation incident thereon varies linearly over at least a portion of the radial extent between the first boundary and the second boundary so as to generate a phase shift between the first and second boundaries, the second boundary disposed at a radial distance further from the optical axis than the first boundary; and
the outer region extends radially from the second boundary towards an outermost edge of the optic;
the zonal structure having an inner power zone having a first curvature and an outer transition zone having a second curvature, the inner power zone extending radially from the optical axis to the second boundary, and the outer transition zone extending radially from the optical axis to a third boundary, the third boundary disposed at a radial distance further from the optical axis than the second boundary; and
the base structure having a base curvature extending radially from the optical axis to the outermost edge of the optic.