Accommodating intraocular lenses and methods of use

An accommodating intraocular lens, comprising:

• an optic portion comprising an optical axis and an optic fluid chamber;
• and
• a haptic having a proximal portion secured to the optic portion and a free distal portion disposed away from the proximal portion, wherein a radially innermost surface of the haptic, relative to the optical axis, from the proximal portion to the free distal portion, follows a curved radially-outer peripheral surface of the optic portion, and
• in a first cross section between the proximal portion and the free distal portion, the haptic has a first radially innermost wall radial thickness and a radially outermost wall thickness, the radial thicknesses measured orthogonal to the optical axis, and the radially innermost surface is directly adjacent the optic portion, the first inner wall radial thickness being greater than the radially outermost wall thickness, wherein the thicker inner wall radial thickness adapts the haptic to be more sensitive to capsular forces in the radial direction than to capsular forces in the anterior-to-posterior direction, and
• in a second cross section closer to the proximal portion than the first cross section, the haptic has a second radially innermost wall radial thickness less than the first radially innermost wall radial thickness and the radially innermost surface is radially further from the optic portion than in the first cross section, the haptic comprising a haptic fluid chamber in fluid communication with the optic fluid chamber,
• wherein in each of the first and second cross sections there is only a single lumen, the single lumen being the haptic fluid chamber,
• wherein the haptic fluid chamber has the same configuration, in cross section, in the first section and the second section,
• wherein the haptic is adapted to deform in response to forces on the haptic due to ciliary muscle movement to thereby move a fluid between the haptic fluid chamber and the optic fluid chamber to change an optical parameter of the accommodating intraocular lens.