Ophthalmic implants with extended depth of field and enhanced distance visual acuity

Abstract

A lens configured for implantation into an eye of a human can include an optic including transparent material. The optic can have an anterior surface and a posterior surface. Each of the anterior surface and the posterior surface can have a surface vertex. The optic can have an optical axis through the surface vertices. The lens can also include at least one haptic disposed with respect to the optic to affix the optic in the eye when implanted therein. The anterior and posterior surfaces can include aspheric surfaces. The posterior surface can have an aspheric shape that comprises a biconic offset by perturbations comprising an aspheric higher order function of radial distance from the optical axis. The posterior surface can have an absolute value of ratio R x /R y between 0 and 100 and an absolute value of ratio k x /k y between 0 and 100.

What is claimed is: 
     
         1 . A lens sized and configured for implantation into an eye of a human, the lens comprising:
 an optic comprising transparent material, the optic having an anterior surface and a posterior surface, at least one of the anterior surface and the posterior surface comprising an aspheric surface,   wherein the anterior and posterior surfaces are shaped to provide a Salvador Image Quality (SIQ) metric that is at least 0.6 for at least 90% of the object vergences within the range of 0 to +1.5 Diopter (D) when the optic is inserted into a human eye having an aperture size of 4 to 6 millimeters.   
     
     
         2 . The lens of  claim 1 , wherein the anterior and posterior surfaces are shaped to provide the SIQ that is at least 0.6 for at least 95% of the object vergences within the range of 0 to +1.5 Diopter (D). 
     
     
         3 . The lens of  claim 2 , wherein the anterior and posterior surfaces are shaped to provide the SIQ that is at least 0.6 for at least 98% of the object vergences within the range of 0 to +1.5 Diopter (D). 
     
     
         4 . The lens of  claim 3 , wherein the anterior and posterior surfaces are shaped to provide the SIQ that is at least 0.6 for at least 98% of the object vergences within the range of 0 to +2.5 Diopter (D). 
     
     
         5 . The lens of  claim 1 , wherein the anterior and posterior surfaces are shaped to provide the SIQ that is at least 0.6 for at least 90% of the object vergences within the range of 0 to +2.5 Diopter (D). 
     
     
         6 . The lens of  claim 1 , wherein the aperture size is 6 millimeters. 
     
     
         7 . The lens of  claim 1 , wherein the anterior surface and the posterior surface each have a surface vertex, the optic having an optical axis through the surface vertices, and wherein at least one of the anterior surface and the posterior surface has an aspheric shape that comprises a biconic offset by perturbations comprising an aspheric higher order function of radial distance from the optical axis. 
     
     
         8 . The lens of  claim 7 , wherein the optic comprises an exit pupil, and wherein the anterior and posterior surfaces are shaped to provide a radial power profile characterized by Φ(Γ)=a+br 2 +cr 4 +dr 6 +er 8  for wavefront at the exit pupil of the optic for an object vergence of 0 to 2.5 Diopter (D), where r is the radial distance from the optical axis and a, b, c, d, and e are coefficients. 
     
     
         9 . The lens of  claim 1 , wherein the anterior surface is convex and the posterior surface is concave such that the optic is meniscus shaped. 
     
     
         10 . A lens sized and configured for implantation into an eye of a human, said lens comprising:
 an optic comprising transparent material, the optic having all anterior surface and a posterior surface, at least one of the anterior surface and the posterior surface comprising an aspheric surface,   wherein the anterior and posterior surfaces are shaped to provide an above average psychophysical grade for at least 90% of the object vergences within the range of 0 to +1.5 Diopter (D) when said optic is inserted into said human eye having an aperture size of 4 to 6 millimeters or into a model eye having an aperture size of 4 to 6 millimeters.   
     
     
         11 . The lens of  claim 10 , wherein the anterior and posterior surfaces are shaped to provide the above average psychophysical grade for at least 95% of the object vergences within the range of 0 to +1.5 Diopter (D). 
     
     
         12 . The lens of  claim 11 , wherein the anterior and posterior surfaces are shaped to provide the above average psychophysical grade for at least 98% of the object vergences within the range of 0 to +1.5 Diopter (D). 
     
     
         13 . The lens of  claim 12 , wherein the anterior and posterior surfaces are shaped to provide the above average psychophysical grade for at least 98% of the object vergences within the range of 0 to +2.5 Diopter (D). 
     
     
         14 . The lens of  claim 10 , wherein the anterior and posterior surfaces are shaped to provide the above average psychophysical grade for at least 90% of the object vergences within the range of 0 to +2.5 Diopter (D). 
     
     
         15 . The lens of  claim 10 , wherein the aperture size is 6 millimeters. 
     
     
         16 . The lens of  claim 10 , wherein each of the anterior surface and the posterior surface has a surface vertex, the optic having an optical axis through the surface vertices, and wherein at least one of the anterior surface and the posterior surface has an aspheric shape that comprises a biconic offset by perturbations comprising an aspheric higher order function of radial distance from the optical axis. 
     
     
         17 . The lens of  claim 16 , wherein the optic comprises an exit pupil, and wherein the anterior and posterior surfaces are shaped to provide a radial power profile characterized by Φ(Γ)=a+br 2 +cr 4 +dr 6 +er 8  for wavefront at the exit pupil of the optic for an object vergence of 0 to 2.5 Diopter (D), where r is the radial distance from the optical axis and a, b, c, d, and e are coefficients. 
     
     
         18 . The lens of  claim 16 , wherein a thickness along the optical axis is between about 100-700 Micrometers. 
     
     
         19 . The lens of  claim 10 , wherein the anterior surface is convex and the posterior surface is concave such that the optic is meniscus shaped.