Accommodating intraocular lenses
An intraocular lens adapted to be implanted inside a capsular bag, comprising a peripheral portion comprising an anterior annular portion adapted to engage an anterior capsule portion, the anterior annular portion defining an anterior opening through which an optical axis passes, a posterior annular portion adapted to engage a posterior capsule portion, the anterior and posterior annular portions being adapted to keep the capsular bag open after implantation, and an optic portion disposed within the anterior opening and secured to and radially inward relative to the peripheral portion.
1. An accommodating intraocular lens adapted for post-implant adjustment, comprising:
an optic portion comprising an anterior element that comprises the anterior-most location of the optic portion and a posterior element that comprises the posterior-most location of the optic portion, the anterior and posterior elements at least partially defining a fluid filled optic, the anterior element being deformable; and
a peripheral portion extending peripherally from the optic portion, the peripheral portion including a plurality of haptics having anterior surfaces that extend radially and anteriorly from the optic portion, a portion of each of the plurality of haptics extending further anteriorly than the anterior-most location of the optic portion in accommodated configurations, the plurality of haptics positioned and configured to engage a native capsular bag when implanted, the plurality of haptics adapted to deform in response to capsular bag reshaping, the deformation of the plurality of haptics causing the deformation of at the anterior element to change the power of the lens,
wherein a first haptic of the plurality of haptics further includes a free end and a plurality of discrete and spaced apart shape memory polymer portions disposed peripherally relative to the optic portion, the plurality of shape memory polymer portions each adapted to swell and become larger in response to external application of energy, wherein the plurality of shape memory polymer portions are positioned such that when they become larger they cause a change in the fluid pressure in the fluid filled optic.
2. The accommodating intraocular lens of claim 1 , wherein no portion of any of the plurality of haptics extends further posteriorly than the posterior-most location of the optic portion.
3. The accommodating intraocular lens of claim 1 , wherein each of the plurality of haptics has a free end that is not secured directly to the optic portion.
4. The accommodating intraocular lens of claim 1 , wherein a second haptic of the plurality of haptics further includes a free end and a plurality of second discrete and spaced apart shape memory polymer portions disposed around the periphery of the optic portion, the plurality of second shape memory polymer portions each adapted to swell and become larger in response to external application of energy, wherein the plurality of second shape memory polymer portions are positioned such that when they become larger they cause a change in the fluid pressure in the fluid filled optic.
5. The accommodating intraocular lens of claim 1 , wherein the first haptic includes a haptic fluid chamber in communication with the fluid filled optic, and wherein the plurality of discrete and spaced apart shape memory polymer portions are positioned such that when they become larger they modify the volume of the haptic fluid chamber.