Accommodating intraocular lenses and methods of manufacturing

1. An intraocular lens, comprising:

an optic body;

a projection extending radially outwards from a peripheral surface of the optic body, wherein the projection comprises a haptic contact surface facing radially outward, wherein the entire haptic contact surface is a flat surface; and

a haptic having a free distal end and a proximal portion secured to the projection along the haptic contact surface, wherein the projection and the proximal portion interface at a butt joint without the haptic extending into the projection and without the projection extending into the haptic, wherein the haptic comprises a haptic fluid chamber.

2. An intraocular lens comprising:

an optic body comprising a peripheral surface; and

a haptic comprising a free distal end and a proximal end having an optic contact surface facing radially inward, wherein the entire optic contact surface is a flat surface, wherein the haptic comprises a haptic fluid chamber,

wherein the optic body comprises a projection having a haptic contact surface, and

wherein the haptic is coupled to the optic body when the optic contact surface is joined to the haptic contact surface of the projection at a butt joint without the haptic extending into the projection and without the projection extending into the haptic.

3. The intraocular lens of claim 1 , wherein the proximal portion of the haptic comprises an optic contact surface, wherein the entire optic contact surface is a flat surface.

4. The intraocular lens of claim 1 , wherein the projection comprises two side surfaces radially inward of the haptic contact surface, wherein at least one of the two side surfaces comprises a curved surface when viewed from a top plan view or a bottom plan view.

5. The intraocular lens of claim 1 , wherein the projection extends between 10 microns and 500 microns radially outward from the peripheral surface of the optic body.

6. The intraocular lens of claim 1 , wherein the optic body and the projection are a single integral body.

7. The intraocular lens of claim 1 , wherein the optic body comprises a posterior element and an anterior element defining a fluid chamber therebetween without an intermediate layer.

8. The intraocular lens of claim 7 , wherein the posterior element comprises the projection.

9. The intraocular lens of claim 7 , wherein the anterior element comprises the projection.

10. The intraocular lens of claim 1 , wherein the free distal end of the haptic is unconnected to any other portion of the optic body.

11. The intraocular lens of claim 1 , wherein the projection comprises a plurality of channels in fluid communication with the haptic fluid chamber.

12. The intraocular lens of claim 1 , 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 an optic fluid chamber in the optic body to change an optical parameter of the intraocular lens.

13. The intraocular lens of claim 1 , wherein the proximal portion of the haptic is secured to the projection along the haptic contact surface of the haptic contact surface via an adhesive.

14. The intraocular lens of claim 2 , wherein the optic contact surface of the proximal end of the haptic is secured to the projection via an adhesive.

15. The intraocular lens of claim 1 , wherein the projection comprises two side surfaces configured to taper such that a width of a portion of the projection in contact with the peripheral surface of the optic body is greater than a width of the haptic contact surface of the projection.

16. The intraocular lens of claim 2 , wherein the projection comprises two side surfaces configured to taper such that a width of a portion of the projection in contact with the peripheral surface of the optic body is greater than a width of the haptic contact surface of the projection.

17. The intraocular lens of claim 1 , wherein a cross-sectional thickness of a radially inner fluid chamber wall of the haptic in a cross-sectional plane passing through an optical axis of the optic body is between four and nine times greater than the cross-sectional thickness of a radially outer fluid chamber wall of the haptic.

18. The intraocular lens of claim 2 , wherein a cross-sectional thickness of a radially inner fluid chamber wall of the haptic in a cross-sectional plane passing through an optical axis of the optic body is between four and nine times greater than the cross-sectional thickness of a radially outer fluid chamber wall of the haptic.