RU34359U1 - RED-CHAMBER ARTIFICIAL EYE CRYSTAL - Google Patents

Description

BACK-CHAMBER ARTIFICIAL EYE CRYSTAL.

The utility model relates to the field of medicine, namely to ophthalmology and can be used for surgical correction of aphakia.

It is known that for optical correction an artificial lens is implanted in the patient’s eye to replace a distant cloudy lens, the design of which and the fixation method in the eye can vary significantly. Currently, intraocular lenses placed in the back chamber with support in a ciliary groove or in the equatorial zone are most widely used. own lens capsule.

Fixation of an intraocular lens (IOL) in the posterior chamber has the following advantages, which have been tested in practice: the almost complete absence of aniseikonia and impaired dark adaptation due to the preservation of the shape and function of the pupil; low probability of pupillary block, secondary glaucoma, lack of contact of the IOL with the cornea; cosmetic excellence due to the position of the IOL behind the iris.

The determining factor in the IOL is the design of the support elements and the method of their introduction and placement in the eye.

Known artificial lens containing the optical part and a flexible supporting element in the form of a closed loop, fixed by the ends at the end of the optical part and dissected during implantation (1).

The disadvantage of this artificial lens is the increased invasiveness of its installation and the possibility of postoperative complications.

M.C.A61R2 / 16

Known artificial lens containing the optical part and radially arranged onor elements made in the form of rods with rounded ends (2).

The disadvantage of this artificial lens is the increased complexity of implantation and the lack of reliability of its fixation.

The posterior chamber artificial lens of the eye, including the optical and supporting parts, is also known, the latter made in the form of three loops equally spaced along the end of the optical part, lying in the same plane as the plane of the optical part, with the ends of the loops fixed to the end surface of the optical part and intersecting at three points ( 3).

The disadvantage of this rear-chamber artificial lens is its low technological capabilities due to the small variability of the diameter.

The purpose of creating a utility model is to expand technological capabilities.

This goal is achieved by the fact that each of the loops in the section from the optical part to the point of intersection is made with an elastically deformable element, and the elastically deformable element is made in the form of at least one coil of a spiral, or the elastically deformable element is made in the form of a wave-like curved section loops.

Comparison of the proposed posterior artificial lens with other technical solutions known in this field of medicine, showed its compliance with the criteria of a utility model.

The utility model is illustrated by graphic material, figure 1 shows the proposed posterior artificial lens; figure 2 and fig.Z depicts embodiments of an elastically deformable element.

at the end of the optical part 1 of the loops 2, 3 and 4 lying in the same plane as the plane of the optical part 1. The ends of the loops 2, 3 and 4 are fixed on the end surface of the optical part 1 and intersect at points 5, 6 and 7, each of the loops 2 , 3 and 4 in the section from the optical part 1 to the points of intersection 5, 6 and 7 are made with elastically deformable elements 8, 9 and 10. Elastically deformable elements can be made in the form of at least one spiral coil (Fig.) , or in the form of a wave-curved (Fig. z astka.

The supporting parts 2,3 and 4 can be made of threads not hardened polypropylene.

The optical part 1 is a biconvex lens with a diameter of 5 mm, a thickness of 0.3-0.5 mm. Supporting elements, i.e. loops 2, 3 and 4 securely fix the optical part in the lens capsule or in the ciliary groove.

The posterior chamber artificial lens is implanted after cataract extraction into the lens capsule itself, or the supporting parts 2, 3 and 4 are placed in a ciliary groove. The iris during narrowing and expansion of the pupil glides along the supporting elements, which impede the "capture of the pupil by the optical part.

The presence of elastically deformable elements 8, 9 and 10 makes it possible to reliably fix the lens and eliminate the possibility of displacement of the optical part 1 relative to the visual axis of the eye, reducing the laboriousness of holding the lens through the pupil, expanding technological capabilities by obtaining the possibility of installing it in a wider range of capsule and ciliary membrane sizes.

., SOURCES OF INFORMATION:

1. US patent No. 4617023, CL A61 F 2/16, 1986

2.Aut. testimonial. USSR No. 1428365, cl. A61 F 2/001, 1988

3. RF patent No. 2070003, cl. A61 F 2 / 16.1996

Author / vlhU Malov I.V.

Patentedh / F Carriers B.G.

"2003

-4 FORMULA

Claims (3)

1. Rear-chamber artificial lens, including the optical and supporting parts, the latter is made in the form of three loops equally spaced along the end of the optical part, lying in the same plane as the plane of the optical part, the ends of the loops being fixed to the end surface of the optical part and intersecting at three points, different the fact that, in order to expand technological capabilities, each of the loops in the area from the optical part to the point of their intersection is made with an elastically deformable element. 2. The posterior artificial lens according to claim 1, characterized in that the elastically deformable element is made in the form of at least one coil of a spiral. 3. The posterior chamber lens according to claim 1, characterized in that the elastically deformable element is made in the form of a wave-like curved section of the loop.