System, ophthalmic lens, and method for extending depth of focus

Abstract

System, ophthalmic lens, and method for extending depth of focus includes an optic having a clear aperture disposed about a central axis. The optic includes a first surface and an opposing second surface. The first and second surfaces are configured to introduce an asymmetric aberration to the eye while maintaining the in-focus visual acuity.

What is claimed is: 
     
         1 . An ophthalmic lens for an eye, the eye having an in-focus visual acuity and a depth of focus, the ophthalmic lens comprising:
 an optic having a central axis and a clear aperture disposed about the central axis, the optic comprising a first surface and an opposing second surface, the first and second surfaces together configured to introduce at least some asymmetric aberration to the eye to extend the depth of focus while maintaining the in-focus visual acuity.   
     
     
         2 . The ophthalmic lens of  claim 1 , wherein the asymmetric aberration is a higher order asymmetric aberration. 
     
     
         3 . The ophthalmic lens of  claim 1 , wherein the asymmetric aberration is selected from a group consisting of: an asymmetric astigmatism, a higher order astigmatism, a vertical coma, a lateral coma, and a trefoil. 
     
     
         4 . The ophthalmic lens of  claim 1 , wherein the first and second surfaces are together configured to introduce a predetermined degree of coma to the eye while maintaining the in-focus visual acuity. 
     
     
         5 . The ophthalmic lens of  claim 1 , wherein the optic is selected from the group consisting of: a monofocal intraocular lens, a multifocal intraocular lens, an accommodating intraocular lens, and a toric intraocular lens. 
     
     
         6 . The ophthalmic lens of  claim 1 , wherein one or more of the first and second surfaces comprises an asymmetric curvature. 
     
     
         7 . The ophthalmic lens of  claim 1 , wherein the eye has an intraocular lens implanted therein, the intraocular lens having a predetermined optical characteristic, wherein the in-focus visual acuity is based at least in part on the optical characteristic, and wherein the optic and the intraocular lens are together configured to introduce the asymmetric aberration to the eye while maintaining the in-focus visual acuity. 
     
     
         8 . The ophthalmic lens of  claim 1 , wherein the optic is a multifocal intraocular lens comprising a plurality of focal points, each of the plurality of focal points having a depth of focus, and wherein the asymmetric aberration extends the depth of focus of each of the plurality of focal points. 
     
     
         9 . The ophthalmic lens of  claim 1 , wherein the optic is an accommodating intraocular lens configured to provide the eye with a functional range of vision, and wherein the asymmetric aberration extends the functional range of vision. 
     
     
         10 . The ophthalmic lens of  claim 1 , wherein the optic is further configured to correct for one or more non-asymmetric higher order aberrations. 
     
     
         11 . The ophthalmic lens of  claim 10 , wherein the one or more non-asymmetric higher order aberrations is selected from a group consisting of a spherical aberration and a non-asymmetric astigmatism. 
     
     
         12 . The ophthalmic lens of  claim 1 , further comprising a binary phase mask optically coupled with the optic, the binary phase mask configured to extend the depth of focus by a predetermined amount, and wherein the asymmetric aberration further extends the depth of focus beyond the predetermined amount. 
     
     
         13 . The ophthalmic lens of  claim 1 , wherein the optic is an intraocular lens having a hyperfocal configuration for extending the depth of focus by a predetermined amount, and wherein the asymmetric aberration further extends the depth of focus beyond the predetermined amount. 
     
     
         14 . The ophthalmic lens of  claim 1 , wherein the optic is a zonal aspheric intraocular lens configured to extend the depth of focus by a predetermined amount, and wherein the asymmetric aberration further extends the depth of focus beyond the predetermined amount. 
     
     
         15 . The ophthalmic lens of  claim 1 , wherein the optic is a diffractive monofocal intraocular lens, and wherein the asymmetric aberration is further configured to correct for a chromatic aberration associated with the diffractive monofocal intraocular lens.