Lens implant
AssigneeAccommo AG
InventorEduard Anton Haefliger
Life of this patent
Estimating the term…
Abstract
The lens implant serves to replace the lens body of an eye and possesses substantially the same size and shape. It is elastic such that the eye gets back its capability for accommodation. It consists of two parts (10, 11) with differing refractive indices and/or differing shapes, which allows to adapt the focal length and shape to specific requirements in simple manner. A distal part (11) is prefabricated as pre-made lens part, while the proximal part (10) can preferably be brought into the lens capsule in a flowable state.
Claims25
Lens implant for placement into the lens capsule (2) and for replacing the lens body (3) of an eye, which has substantially the shape of the lens body (3) to be replaced, with a distal surface (12a) and a proximal surface (12b), wherein the distal surface (12a) has a stronger curvature than the proximal surface (12b), and with a first deformable part (10), characterized in that it comprises a second part (11) having a refractive index and/or an elastic deformability that differs from the one of the first part (10), which first part (10) forms a proximal portion and which second part (11) forms a distal portion of the lens implant.
Lens implant of any of the preceding claims characterized in that the first part (10) and the second part (11) abut against each other.
Lens implant of any of the preceding claims characterized in that the first part (10) is cureable intraoccularly from a flowable to a elastically deformable state.
Lens implant of any of the preceding claims characterized in that the second part (11) is elastically deformable for introduction into the lens capsule in a rolled up or folded state.
Lens implant of any of the preceding claims characterized in that the first part (10) forms the proximal surface (12b).
Lens implant of any of the preceding claims characterized in that a distal side of the second part (11) is curved in its relaxed state for forming the convex distal surface (12a) of the lens implant.
Lens implant of any of the preceding claims characterized in that the first part (10) includes at least a material selected from the group consisting of cross-linked polysiloxanes, hydrogels and collagen preparations.
Lens implant of any of the preceding claims characterized in that the first part is better deformable that the second part, and in particular that the first part is better elastically deformable than the second part.
Lens implant of any of the preceding claims characterized in that the first part is a gel.
Lens implant of any of the preceding claims characterized in that the first part comprises a bag (11a) filled by a filling material (11b).
Lens implant of any of the preceding claims characterized in that the proximal surface is convex with a radius of curvature between 8.4 and 13.8 mm, and in that the distal surface is convex with a radius of curvature between 4.6 and 7.5 mm, and in that the lens implant has a thickness between 2.8 and 5.5 mm.
Lens implant of any of the preceding claims characterized in that it is dimensioned and shaped in such a manner that it has substantially the dimensions and shape of a natural lens body.
Lens implant of any of the preceding claims characterized in that the first part (10) has a volume that exceeds the volume of the second part (11).
Lens implant of any of the preceding claims characterized in that the first part (10) has a diameter that exceeds the diameter of the second part (11).
Kit for the production of lens implants of any of the preceding claims characterized by at least one flowable filling material for forming the first part (10), and a plurality of preshaped lens parts for a forming of the second part (11), which lens parts have differing shapes and/or refractive indices.
Method of replacing the lens body of an eye by a lens implant, comprising the steps of
- removing the lens body from the lens capsule of the eye,
- introducing a solid, elastically deformable lens part (11) into the lens capsule (2) for the forming of a distal part of the lens implant and
- introducing a flowable filling material into the lens capsule at a proximal side of the deformable lens part (11) for the forming of a proximal part (10) of the lens implant.
Dependencies are inferred from the claim text.