Intraocular lens and haptic for intraocular lens
An intraocular lens 1 includes a lens 2 and a haptic 3 connected to the lens 2 . The lens 2 is disposed behind an iris 7 in an eye of a patient. The haptic 3 has a main body 3 a and first and second projections 3 d and 3 e . The main body 3 a extends from the lens 2 outward in a radial direction about a visual axis C of the patient. The first and second projections 3 d and 3 e are located so as to project from the main body 3 a toward spaces between a plurality of ciliary zonules 10 connecting a crystalline lens 11 and a ciliary body 8 in the eye. Accordingly, an intraocular lens and a haptic for an intraocular lens that are able to inhibit the position of a lens from being displaced are provided.
1. At least two planar haptics for holding a posterior chamber phakic intraocular lens (IOL) having an IOL axis, the IOL being configured to be disposed behind an iris in an eye of a patient so that the IOL axis is aligned with a visual axis of the patient, each of said at least two planar haptics, comprising:
an elastically deformable plate-shaped leg portion having a posterior surface and an anterior surface and outwardly extending from the IOL in a radial direction about the IOL axis;
a projecting portion projecting from a distal end of the leg portion substantially parallel to the IOL axis, the projecting portion being configured to be fitted into the ciliary sulcus in the eye of the patient;
V-shaped grooves located on the anterior surface and the posterior surface of the leg portion, each of the V-shaped grooves forming an arch shape around the IOL axis; and
a plurality of projections located around the IOL axis and projecting from the posterior surface of the leg portion substantially parallel to the IOL axis, each of the plurality of the projections being configured to project into a space between a plurality of ciliary zonules connecting a crystalline lens and a ciliary body in the eye, wherein
the plurality of the projections further comprises ciliary-zonule-contacting surfaces, wherein each of the plurality of the projections is configured to be interposed and held between the plurality of ciliary zonules via the ciliary-zonule-contacting surfaces, whereby force which is transmitted from the ciliary body through the plurality of ciliary zonules to the crystalline lens is transmitted through the projection portion to the leg portion.
2. The haptics according to claim 1 , wherein the plurality of the projections is grouped into a first row of the projections and a second row of the projections, a first distance between the IOL axis and each of the first row of the projections is different from a second distance between the IOL axis and each of the second row of the projections.
3. The haptics according to claim 1 , wherein a distance between the IOL axis and each of the plurality of the projections is equal to each other.
4. The haptics according to claim 1 , wherein the IOL is a lens for correcting astigmatism of the patient.
5. At least two planar haptics for holding a posterior chamber phakic intraocular lens (IOL) having an IOL axis, the IOL being configured to be disposed behind an iris in an eye of a patient so that the IOL axis is aligned with a visual axis of the patient, each of said at least two planar haptics, comprising:
an elastically deformable plate-shaped leg portion having a posterior surface and outwardly extending from the IOL in a radial direction about the IOL axis;
a projecting portion for projecting from a distal end of the leg portion substantially parallel to the IOL axis, the projecting portion being configured to be fitted into the ciliary sulcus in the eye of the patient; and
a plurality of projections having at least two rows located around the IOL axis and projecting from the posterior surface of the leg portion substantially parallel to the IOL axis, the plurality of the projections alternate with each other between the two rows, each of the projections being configured to project into a space between a plurality of ciliary zonules connecting a crystalline lens and a ciliary body in the eye, wherein
the plurality of the projections further comprises ciliary- zonule-contacting surfaces, wherein each of the plurality of the projections is configured to be interposed and held between the plurality of ciliary zonules via the ciliary-zonule-contacting surfaces, whereby force which is transmitted from the ciliary body through the plurality of ciliary zonules to the crystalline lens is transmitted through the projection portion to the leg portion.