Accommodating intraocular lenses with toric surface

Abstract

Disclosed are toric accommodating intraocular lenses. In one embodiment, a toric accommodating intraocular lens comprises an anterior element and a posterior element. The anterior element can comprise an anterior optical surface. The posterior element can comprise a posterior optical surface. A fluid-filled optic fluid chamber can be defined in between the anterior element and the posterior element. The toric accommodating intraocular lens can be configured to correct for corneal astigmatism, spherical aberration, or a combination thereof.

We claim: 
     
         1 . A toric accommodating intraocular lens, comprising:
 an optic portion comprising an anterior element having an anterior optical surface, a posterior element having a posterior optical surface, and a fluid-filled optic fluid chamber defined therebetween,
 wherein the anterior optical surface is shaped such that a radius of curvature of the anterior optical surface differs along different optical surface meridians. 
   
     
     
         2 . The toric accommodating intraocular lens of  claim 1 , wherein the anterior optical surface is shaped such that the radius of curvature of the anterior optical surface differs along different optical surface meridians of the anterior optical surface. 
     
     
         3 . The toric accommodating intraocular lens of  claim 2 , wherein the radius of curvature of the anterior optical surface varies periodically around the anterior optical surface. 
     
     
         4 . The toric accommodating intraocular lens of  claim 3 , wherein the anterior element further comprises an anterior inner surface that is rotationally symmetric. 
     
     
         5 . The toric accommodating intraocular lens of  claim 4 , wherein the anterior element has an anterior element thickness as measured from the anterior optical surface to the anterior inner surface, wherein the anterior element thickness varies periodically around the anterior element. 
     
     
         6 . The toric accommodating intraocular lens of  claim 2 , wherein the posterior optical surface is an aspherical surface. 
     
     
         7 . The toric accommodating intraocular lens of  claim 1 , wherein a base power of the optic portion is configured to change based on a pressure within the fluid-filled optic fluid chamber. 
     
     
         8 . The toric accommodating intraocular lens of  claim 7 , wherein a cylinder power of the optic portion is configured to remain substantially unchanged throughout the change in base power of the optic portion in response to changes in the pressure within the fluid-filled optic fluid chamber. 
     
     
         9 . The toric accommodating intraocular lens of  claim 7 , wherein a cylinder orientation of the optic portion is configured to remain substantially unchanged throughout the change in base power of the optic portion in response to changes in the pressure within the fluid-filled optic fluid chamber. 
     
     
         10 . The toric accommodating intraocular lens of  claim 1 , wherein the anterior optical surface comprises a flat meridian and a steep meridian oriented substantially perpendicular to the flat meridian, and wherein the radius of curvature is the least along the steep meridian and the radius of curvature is the greatest along the flat meridian. 
     
     
         11 . The toric accommodating intraocular lens of  claim 10 , wherein the flat meridian is oriented at an oblique angle with respect to a midline substantially bisecting the optic portion. 
     
     
         12 . The toric accommodating intraocular lens of  claim 11 , wherein the oblique angle is a clockwise rotational angle between about 30 degrees and 60 degrees. 
     
     
         13 . The toric accommodating intraocular lens of  claim 11 , further comprising a first haptic coupled to the optic portion at a first haptic-optic interface and a second haptic coupled to the optic portion at a second haptic-optic interface diametrically opposed to the first haptic-optic interface, and wherein the midline substantially bisects the first haptic-optic interface and the second haptic-optic interface. 
     
     
         14 . The toric accommodating intraocular lens of  claim 11 , wherein the optic portion comprises a first pair of fluid channels configured to place the fluid-filled optic fluid chamber in fluid communication with a haptic fluid chamber and a second pair of fluid channels configured to place the fluid-filled optic fluid chamber in fluid communication with another haptic fluid chamber, and wherein the midline extends in between the first pair of fluid channels and in between the second pair of fluid channels. 
     
     
         15 . A toric accommodating intraocular lens, comprising:
 a shape-changing optic portion comprising an external optical surface,
 wherein a refractive dioptric power of the external optical surface is greatest along a steep meridian of the external optical surface and the refractive dioptric power of the external optical surface is least along a flat meridian of the external optical surface, wherein the flat meridian is oriented at an oblique angle with respect to a midline substantially bisecting a haptic-optic interface of the toric accommodating intraocular lens, and 
 wherein a base power of the optic portion is configured to change in response to a shape change undertaken by the shape-changing optic portion. 
   
     
     
         16 . The toric accommodating intraocular lens of  claim 15 , wherein the shape-changing optic portion is configured to change shape in response to a physiologic muscle movement undertaken by a patient when the toric accommodating intraocular lens is implanted within the patient. 
     
     
         17 . The toric accommodating intraocular lens of  claim 15 , wherein a relative refractive dioptric power between the flat meridian and the steep meridian is configured to remain substantially unchanged throughout the change in the base power of the optic portion. 
     
     
         18 . The toric accommodating intraocular lens of  claim 15 , further comprising a haptic coupled to the optic portion at a haptic-optic interface, and wherein the midline substantially bisects the haptic-optic interface. 
     
     
         19 . The toric accommodating intraocular lens of  claim 18 , wherein the haptic comprises an optic attachment end and a closed free end opposite the optic attachment end, wherein the closed free end is not directly attached to the optic portion, and wherein the optic attachment end of the haptic is coupled to the optic portion at the haptic-optic interface. 
     
     
         20 . A toric accommodating intraocular lens, comprising:
 an optic portion comprising a posterior element having a posterior optical surface, wherein the posterior element further comprises a posterior inner surface that is rotationally symmetric,
 wherein the posterior optical surface is shaped such that a radius of curvature of the posterior optical surface differs along different optical surface meridians, and 
 wherein the posterior element has a posterior element thickness as measured from the posterior optical surface to the posterior inner surface, wherein the posterior element thickness varies periodically around the posterior element.