Multicomponent intraocular lens

1. A multicomponent intraocular lens implantable in an optical system of a human eye, the multicomponent intraocular lens comprising:

a base component having a front surface intended to be turned towards a front side of the human eye and a back surface opposed to the front surface in thickness direction of the base component and intended to be turned towards a back side of the human eye, the base component comprising a central portion and a haptic which extends from a circumferential side of the central portion away from the central portion, the base component further comprising a retaining member located at a periphery of the central portion and protruding on the front surface of the base component beyond a front surface of the central portion in the thickness direction of the base component, and

a front component comprising an optical portion arranged in front of the front surface of the central portion of the base component, the front component further comprising an attachment tab which extends from a circumferential side of the optical portion of the front component away from the optical portion of the front component and engages the retaining member for attaching the front component to the base component, wherein the attachment tab of the front component comprises a resilient projection that protrudes away from the optical portion of the front component beyond the retaining member, wherein a portion of the resilient projection is located at a non-overlapping position with respect to the haptic of the base component in a circumferential direction around the central portion of the base component, wherein the portion of the resilient projection has a back surface which is located backwards from a front surface of the haptic of the base component in the thickness direction of the base component.

2. The multicomponent intraocular lens of claim 1 , wherein the retaining member comprises a flange having an elongated slot the length of which extends in the circumferential direction around the central portion, wherein the attachment tab of the front component has a flat shape and passes through the slot of the flange.

3. The multicomponent intraocular lens of claim 1 , wherein the central portion of the base component comprises an optical portion of the base component.

4. The multicomponent intraocular lens of claim 3 , wherein the optical portion of the front component comprises a back surface turned towards the front surface of the optical portion of the base component, wherein the back surface of the optical portion of the front component comprises a peripheral contact portion that is laid directly on the front surface of the optical portion of the base component all around the optical portions and a central, recessed portion that is spaced from the front surface of the optical portion of the base component, so as to define a chamber between said front surface of the optical portion of the base component and said back surface of the optical portion of the front component.

5. The multicomponent intraocular lens of claim 4 , wherein the front component comprises a through-hole that passes through a thickness of the optical portion to provide an access to the chamber from a front surface of the optical portion.

6. The multicomponent intraocular lens of claim 1 , wherein the attachment tab comprises a through-hole suitable for inserting a hook or catching tool.

7. The multicomponent intraocular lens of claim 1 , wherein the portion of the resilient projection is a distal end portion located at a distance from the optical portion of the front component.

8. The multicomponent intraocular lens of claim 1 , wherein the resilient projection at rest is angulated backwards in the thickness direction of the base component.

9. The multicomponent intraocular lens of claim 1 , wherein the haptic of the base component at rest is angulated frontwards in the thickness direction of the base component.

10. The multicomponent intraocular lens of claim 1 , wherein the haptic of the base component is a long haptic intended to engage an inner peripheral portion of a capsular bag of the human eye.

11. The multicomponent intraocular lens of claim 1 , wherein the base component comprises a loop-shaped haptic having two branches extending from the circumferential side of the central portion away from the optical central at two circumferential positions located on both sides of the resilient projection in the circumferential direction, wherein each of the two branches of the loop-shaped haptic has an end portion which extends farther than a distal end of the resilient projection and which is curved along the circumferential direction towards the resilient projection, so that the end portions of the two branches meet to form a closed loop around the resilient projection.

12. The multicomponent intraocular of claim 1 , wherein the base component comprises a pair of haptics extending from the circumferential side of the central portion away from the central portion at two circumferential positions located on both sides of the resilient projection in the circumferential direction, wherein the resilient projection extends in a substantially radial position between the pair of haptics as seen in a projection along the thickness direction.

13. The multicomponent intraocular lens of claim 1 , wherein the base component comprises a pair of retaining members which are diametrically opposed with respect to the central portion of the base component and wherein the front component comprises a pair of attachment tabs which are diametrically opposed with respect to the optical portion of the front component.

14. The multicomponent intraocular lens of claim 1 , wherein the base component comprises an annular rib protruding on the front surface of the base component in the thickness direction of the base component and arranged around the optical portion of the front component, wherein an inner diameter of the annular rib substantially matches an outer diameter of the optical portion of the front component.

15. The multicomponent intraocular lens of claim 1 , wherein the optical portion of the front component is adapted to correct astigmatism, wherein the optical portion comprises an optical axis that characterizes the astigmatic correction, wherein at least one of the front component or the base component further comprises an orientation mark to denote the optical axis of the optical portion, wherein the orientation mark is either made of a material selected in the group of materials that absorb or reflect visible light and materials that are transparent to visible light and that absorb or reflect ultraviolet (UV) light or the orientation mark is a conformation of the front surface of the optical portion.

16. The multicomponent intraocular lens in accordance with claim 1 , wherein the resilient projection comprises an internal wall defining an opening within the resilient projection beyond the retaining member.

17. The multicomponent intraocular lens in accordance with claim 1 , wherein the resilient projection extends into a space proximate the haptic to hold a front capsule of the human eye between the front surface of the haptic and the back surface of the resilient projection.