Black only sex cams - Development of a ciliary muscle driven accommodating intraocular lens
Hence the invention provides an accommodative lens construction including at least one optical arrangement adapted to vary its focusing power by movement of at least a part of the optical arrangement and at, least one haptic including at least one rim adapted to contact the mass of the eye and at least one coupling component connecting the rim to at least a part of the optical arrangement, wherein the haptic is adapted to transfer a movement from the mass to at least a part of the optical arrangement. Further the rim 10 and the flange 9 may also extend over limited angular sectors of the full circle.
along the optical axis of the accommodative lens, as, for example, in US2002107568, US2007108643, US2004215340, U. The protruding flange 9 is contacted during contraction thereof, so that contraction of the ciliary mass applies a force to the flange and hence to the optical element 15.
The optical arrangement included in a lens construction should be adapted to employ any of the described mechanisms (translation, shift, rotation or deformation), as well as any combination of the described mechanisms, resulting in a variable focusing effect.
In accommodative lenses described in this document (1)—movement of the ciliary mass is transferred directly to the lens and (2)—lens and ciliary mass are in direct contact. Further an arrow 11 indicates the inter mass distance while an arrow 12 indicates the distance between the optical elements 7, 8 in the direction of the optical axis.
The present invention concerns accommodative lenses, accommodative lens constructions, positioned outside the bag, at the plane of the mass, comprising an optical arrangement to vary the focusing power with at least one optical element and at least one haptic including at least one rim, which can be a flange for position in the sulcus and at least one coupling component and supporting components, with the coupling component adapted to transfer movement from the mass to the optical arrangement to contact the mass directly and to connect to at one end to the rim and at the other end to the optical arrangement. It will be clear that most parts of the accommodative lens, such as the optical elements 7, 8, have a substantial circular shape, but that the coupling element comprises a limited number, for instance two, three or four arms 16 functioning as springs and connecting both optical elements 7, 8.
Further it is assumed that the movement of the rim, especially when it is monolithic, will incorporate the deformation of the rim and possibly the coupling component. In the drawing the anterior optical element 7 has a positive optical strength while the posterior optical element 8 has a negative optical strength; it is however possible that both optical elements 7, 8 have a positive optical strength. 1, the muscle 5 and the ciliary mass 4 are expanded, the lens 1 is relaxed, the distance between the optical elements 7, 8 is small and the accommodative power is low.
Optical arrangements for variable focusing may include effecting at least one optical element. The springs 16 are adapted to convey the movement of the ciliary mass to the posterior optical element, so that contraction of the ciliary mass leads to an axial movement of the posterior optical element 8 in the direction of the optical axis away from the anterior optical element 7.
The variable shape, for example, variation of the radius of curvature of the optical element, can result from the mechanical deformation (“deformation”) of the optical element or any part of it as described, for example, in US2007106377.
This optical element forms a lens of a kind wherein reduction of the radius leads to a bulging of the optical element 15, so that the lens obtains a higher optical strength. 3 shows the situation wherein the muscle 5 and ciliary mass 4 are expanded, the optical element 15 is relaxed with a large radius, so that it is relatively flat and the accommodative power of the lens is low. 4 shows the same embodiment, but during accommodation.
The muscle 5 and ciliary mass 4 are contracted, the optical element 15 is compressed by the haptics including the rim 10 of the haptics.
Hence the optical element 15 has a small radius, and the accommodative power is high.
An adjustable-power intraocular lens according to claim 1 wherein said adjustment means causes said lens means to move (1) toward said first position when said ciliary muscle relaxes and (2) toward said second position when said ciliary muscle contracts.5.