Accommodating intraocular lens

Abstract

An intraocular lens (IOL) for implantation within a capsular bag of a patient's eye comprises an optical structure and a haptic structure. The optical structure comprises a planar member, a plano convex member, and a fluid optical element defined between the planar member and the plano convex member. The fluid optical element has an optical power. The haptic structure couples the planar member and the plano convex member together at a peripheral portion of the optical structure. The haptic structure comprises a fluid reservoir in fluid communication with the fluid optical element and a peripheral structure for interfacing to the lens capsule. Shape changes of the lens capsule cause one or more of volume or shape changes to the fluid optical element in correspondence to deformations in the planar member to modify the optical power of the fluid optical element.

I/We claim: 
     
         1 . An accommodating intraocular lens, comprising:
 an optical structure comprising a posterior member, an anterior member, and a fluid-filled chamber therebetween providing an optical power; and   a haptic structure coupled to the optical structure,   wherein one or more of a shape or volume of the fluid-filled chamber is configured to change in response to a radial force exerted on the haptic structure,   wherein the posterior member is displaced when the radial force is exerted on the haptic structure, and   wherein the change of one or more of the shape or volume of the fluid-filled chamber changes the optical power of the fluid-filled chamber while leaving optical powers provided by the posterior and anterior members substantially unchanged.   
     
     
         2 . The accommodating intraocular lens of  claim 1  wherein one or both of the posterior member and the anterior member provide substantially no optical power. 
     
     
         3 . The accommodating intraocular lens of  claim 1  wherein the fluid-filled chamber includes an inner portion and an outer portion, and wherein the radial force exerted on the haptic structure is configured to displace fluid from the outer portion toward the inner portion. 
     
     
         4 . The accommodating intraocular lens of  claim 3  wherein one or both of the posterior member and the anterior member define one or more openings that fluidly couple the inner and outer portions of the fluid-filled chamber. 
     
     
         5 . The accommodating intraocular lens of  claim 1  wherein, when the accommodating intraocular lens is implanted within an eye of a patient, at least a portion of the haptic structure is positioned anterior to the fluid-filled chamber. 
     
     
         6 . The accommodating intraocular lens of  claim 1  wherein the fluid-filled chamber contains a fluid, and wherein the fluid includes saline, a non-ionic solution, and/or silicone oil. 
     
     
         7 . The accommodating intraocular lens of  claim 1  wherein:
 the fluid-filled chamber includes a haptic reservoir portion and a fluid lens portion providing the optical power and positioned radially inward from the haptic reservoir portion, and 
 a volume of fluid within the fluid lens portion increases in response to a radial force exerted on the haptic reservoir portion to change the optical power of the fluid lens portion. 
 
     
     
         8 . The accommodating intraocular lens of  claim 1  wherein the haptic structure includes at least two outwardly-extended portions and a recessed relief portion between the two outwardly-extended portions. 
     
     
         9 . An accommodating intraocular lens, comprising:
 a base lens component defining a fluid-filled interior of the accommodating intraocular lens, wherein the base lens component includes—
 an inner portion providing a first optical power and defining an optical chamber portion of the fluid-filled interior, and 
 an outer portion positioned radially outward of the optical chamber portion and defining a haptic chamber portion of the fluid-filled interior, 
   wherein a volume of fluid within the optical chamber portion of the base lens component provides a second optical power, and   wherein, when the accommodating intraocular lens is implanted in an eye of a patient, the haptic chamber portion of the base lens component is configured to receive a compressive force from an eye of the patient and (i) deform at least part of the inner portion of the base lens component without substantially changing the first optical power of the inner portion and (ii) increase the volume of fluid within the optical chamber portion to increase the second optical power.   
     
     
         10 . The accommodating intraocular lens of  claim 9  wherein the outer portion of the base lens component includes a haptic configured to receive the compressive force from an eye of the patient when the base lens component is implanted in the eye. 
     
     
         11 . The accommodating intraocular lens of  claim 9  wherein:
 the outer portion of the base lens component defines an outermost perimeter of the accommodating intraocular lens, and 
 when the accommodating intraocular lens is implanted in an eye of a patient, one or more regions of the outermost perimeter are configured to receive the compressive force from an eye of the patient. 
 
     
     
         12 . The accommodating intraocular lens of  claim 9  wherein the compressive force displaces the fluid within the fluid-filled interior from the haptic chamber portion toward the optical chamber portion. 
     
     
         13 . The accommodating intraocular lens of  claim 9  wherein the first optical power is substantially zero. 
     
     
         14 . The accommodating intraocular lens of  claim 9  wherein the base lens component includes an anterior component and a posterior component coupled to the anterior component to define the fluid-filled interior, wherein one or both of the anterior component and the posterior component provide substantially no optical power. 
     
     
         15 . The accommodating intraocular lens of  claim 9  wherein the base lens component includes an anterior component and a posterior component coupled to the anterior component to define the fluid-filled interior, and wherein the compressive force from the eye deforms one or both of the anterior component and the posterior component to increase a distance between the anterior component and the posterior component. 
     
     
         16 . The accommodating intraocular lens of  claim 9  wherein the base lens component includes an anterior component and a posterior component coupled to the anterior component to define the fluid-filled interior, and wherein the compressive force from the eye deforms one or both of the anterior component and the posterior component to increase a volume of the optical chamber portion to increase the volume of fluid within the optical chamber portion. 
     
     
         17 . A method of changing an optical power of an accommodating intraocular lens, the method comprising:
 receiving, via a haptic structure of an accommodating intraocular lens implanted within an eye of a patient, a compressive force from the eye of the patient;   increasing an optical power of the accommodating intraocular lens in response to the compressive force by increasing a volume of fluid within an optical chamber portion defined by an anterior member and a posterior member of the accommodating intraocular lens; and   deforming one or both of the anterior member and posterior members in response to the compressive force while leaving optical powers provided by the anterior and posterior members substantially unchanged.   
     
     
         18 . The method of  claim 17  wherein increasing the optical power includes decreasing a volume of fluid within a haptic chamber portion defined by the anterior and posterior members of the accommodating intraocular lens, the haptic chamber portion positioned radially outward from the optical chamber portion. 
     
     
         19 . The method of  claim 17  wherein the anterior and posterior members define a fluid-filled interior of the accommodating intraocular lens, and wherein the fluid-filled interior includes the optical chamber portion, and further wherein:
 increasing the optical power includes changing a distribution of fluid within the fluid-filled interior. 
 
     
     
         20 . The method of  claim 17  wherein the haptic structure defines an outermost periphery of the accommodating intraocular lens, and wherein:
 receiving the compressive force includes receiving the compressive force at one or more regions along the outermost periphery.