Intraocular lens having a specific, three-dimensionally curved haptic element
An intraocular lens is provided which includes a single optical part, a haptic element, which is coupled to the optical part, and an optical main axis, which penetrates a front face and a rear face of the optical part, the haptic element having a first haptic part, which is in the form of a first ring and extends around the optical part, and at least one second haptic part, which is in the form of a second ring and extends around the optical part and is elastically movable relative to the first haptic part, at least one of the two rings being uneven in the peripheral direction about the optical main axis, at least one of the two rings having exactly two ring valleys and exactly two ring hills.
1. An intraocular lens, comprising:
a single optical part having a front side and a back side;
a haptic coupled to the single optical part;
the intraocular lens defining a main optical axis which passes through the front side and the back side of the single optical part;
the haptic including a first haptic part which is in a form of a first ring and encircles the single optical part, and at least one second haptic part which is in the form of a second ring and encircles the single optical part and which is elastically movable relative to the first haptic part;
at least one of the first and second rings having an uneven form in a circumferential direction about the main optical axis;
the first ring having exactly two first ring valleys and exactly two first ring peaks;
the second ring having exactly two second ring valleys and exactly two second ring peaks;
one ring valley of the exactly two first ring valleys and one ring valley of the exactly two second ring valleys being arranged at a same first azimuthal position in a circumferential direction about the main optical axis and another ring valley of the exactly two first ring valleys and another ring valley of the exactly two second ring valleys being arranged at a same second azimuthal position in the circumferential direction about the main optical axis such that the first ring and the second ring are in contact with one another at the same first and second azimuthal positions.
2. The intraocular lens as claimed in claim 1 , wherein at least one of the first and second rings with the exactly two ring valleys and the exactly two ring peaks has a shape of an edge ring of a saddle form.
3. The intraocular lens as claimed in claim 1 , wherein the at least one of the first and second rings merges with the single optical part with its ring valleys along a circumferential side and its ring peaks arranged so as not to be in contact with the single optical part.
4. The intraocular lens as claimed in claim 3 , wherein the ring valleys are arranged at a first radius with respect to the main optical axis in a projected view in a direction of the main optical axis and the ring peaks are arranged at a second radius which is comparatively larger than the first radius in the projected view.
5. The intraocular lens as claimed in claim 1 , wherein the at least one of the first and second rings with the exactly two ring valleys and the exactly two ring peaks has a first ring portion which extends from the first ring valley over a first ring peak and up to a second ring valley, and a clear width of the first ring portion as measured between the ring valleys being at least 90% of a diameter of the single optical part.
6. The intraocular lens as claimed in claim 1 , wherein the at least one of the first and second rings with the exactly two ring valleys and exactly two ring peaks has a first ring portion which extends from the first ring valley over a first ring peak and up to a second ring valley, a curvature of the first ring portion being directed radially to the outside in relation to the main optical axis.
7. The intraocular lens as claimed in claim 1 , wherein the single optical part defines a central plane, and
wherein the ring peaks have a larger distance from the central plane of the single optical part than the ring valleys when considered parallel to the main optical axis.
8. The intraocular lens as claimed in claim 7 , wherein the first ring has a same shape as the second ring and the first and second rings are arranged symmetrically in relation to the central plane of the single optical part.
9. The intraocular lens as claimed in claim 8 , wherein the first and second rings, with their respective ring valleys, are directly connected to the single optical part at a circumferential wall of the single optical part.
10. The intraocular lens as claimed in claim 8 , wherein the first and second rings, are formed in one piece with the single optical part.
11. The intraocular lens as claimed in claim 1 , wherein the intraocular lens is a posterior chamber lens for implantation into a capsular bag of an eye.