US 12,449,675 B2
Subsurface optical structure with enhanced distribution of refractive index values
Lisen J. Xu, Pittsford, NY (US); and Gustavo A. Gandara-Montano, Rochester, NY (US)
Assigned to Clerio Vision, Inc., Rochester, NY (US)
Filed by Clerio Vision, Inc., Rochester, NY (US)
Filed on Feb. 17, 2023, as Appl. No. 18/170,783.
Application 18/170,783 is a continuation of application No. PCT/US2021/046564, filed on Aug. 18, 2021.
Claims priority of provisional application 63/069,943, filed on Aug. 25, 2020.
Prior Publication US 2023/0204978 A1, Jun. 29, 2023
Int. Cl. G02C 7/04 (2006.01); A61F 2/16 (2006.01); G02C 7/02 (2006.01)
CPC G02C 7/049 (2013.01) [A61F 2/1656 (2013.01); G02C 2202/12 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An ophthalmic lens comprising:
a lens body made of a transparent material;
a first optical structure disposed within a first volume of the lens body, wherein the first optical structure comprises sub-volumes of the first volume, wherein each of the sub-volumes of the first optical structure has a respective refractive index spatial dependence, wherein refractive indexes of the sub-volumes of the first volume vary spatially between a first limit refractive index for the first optical structure and a second limit refractive index for the first optical structure, wherein the refractive indexes of the sub-volumes of the first volume are equal to the first limit refractive index for the first optical structure over a first section of the first volume, wherein the first section of the first volume spans at least 0.050 mm in length between an inner boundary of the first section of the first volume and an outer boundary of the first section of the first volume, wherein the refractive indexes of the sub-volumes of the first volume are equal to the second limit refractive index for the first optical structure over a second section of the first volume, and wherein the second section of the first volume spans at least 0.050 mm in length between an inner boundary of the second section of the first volume and an outer boundary of the second section of the first volume; and
a second optical structure disposed within a second volume of the lens body, wherein the second optical structure comprises sub-volumes of the second volume, wherein each of the sub-volumes of the second optical structure has a respective refractive index spatial dependence, wherein refractive indexes of the sub-volumes of the second optical structure vary spatially between a first limit refractive index for the second optical structure and a second limit refractive index for the second optical structure, wherein the refractive indexes of the sub-volumes of the second optical structure are equal to the first limit refractive index for the second optical structure over a first section of the second optical structure, wherein the first section of the second optical structure spans at least 0.021 mm in length between an inner boundary of the first section of the second optical structure and an outer boundary of the first section of the second optical structure, wherein the refractive indexes of the sub-volumes of the second optical structure are equal to the second limit refractive index for the second optical structure over a second section of the second optical structure, and wherein the second section of the second optical structure spans at least 0.021 mm in length between an inner boundary of the second section of the second optical structure and an outer boundary of the second section of the second optical structure.