An improved intraocular lens comprises a plastic lens body and a plurality of flexible and memory retaining non-biodegradable strands, each strand having one end secured to the lens body and the opposite end unsecured. Preferably, the strands are composed of polypropylene. In cataract surgery, following either intra or extra capsular extraction, the lens of the invention is implanted in the posterior chamber.
An intraocular lens for implant in the eye, particularly in the anterior chamber, includes a lens body and at least three flexible, resilient, fixation filaments extending from the periphery of the lens body and having curved intermediate and distal portions to minimize drainage blockage in the angle of intersection of the cornea and the iris while minimizing the risk of passing of a filament through the pupil and tucking a filament in the iris during insertion of the intraocular lens. The use of at least three fixation filaments reduces twisting or turning of the intraocular lens and produces secure centralization of the intraocular lens with increased stability and reduced chance of inadvertent movement of the intraocular lens in the eye.
An intraocular lens with a medial light-focusing lens body includes oppositely disposed position fixation means with respective seating portions that are resiliently retained in the eye without sutures. One of the position fixation means is adapted to be seated forwardly of the other position fixation means with respect to the optical axis of the eye. After the intraocular lens has been inserted in the eye the seating portion of the forwardly disposed position fixation means has a greater radial extent from the optical axis of the eye than the seating portion of the rearwardly disposed position fixation member.
An artificial crystalline lens shaped as a lens provided with supporting and fastening elements. The fastening element is essentially a wire angle held at its ends to the lens lateral surface, while the supporting element is arranged on a diametrically opposite side of the lens. The vertex of the fastening wire angle lies on a line passing through the midpoint of the supporting element and the center of the lens. The supporting element is made of an elastic wire so as to make it possible to adjust the distance from the center of the lens to the supporting wire element. A novel method of implanting the artificial crystalline lens is also the subject of the present invention.
An intraocular lens for implant in the anterior chamber has four fixation members extending from a lens body with the lens body having curved, opposed end peripheral edges and curved side peripheral edges, the radius of curvature of the end peripheral edges being less than the radius of curvature of the side peripheral edges and the fixation members extending from the junctions of the end and side peripheral edges and having continuously curved proximal legs, junction portions and distal legs terminating at footplates to be received in the angle of intesection of the cornea and iris such that the fixation members flex along their entire length in response to forces applied to the footplates.
