CN213607196U

CN213607196U - Sclera self-fixing type artificial lens

Info

Publication number: CN213607196U
Application number: CN202022242571.XU
Authority: CN
Inventors: 林慧; 毕燕龙; 张语珊; 刘春雨; 邵玉婷
Original assignee: Shanghai Tongji Hospital
Current assignee: Shanghai Tongji Hospital
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-07-06
Anticipated expiration: 2030-10-10

Abstract

The utility model relates to a sclera self-fixing type intraocular lens, which comprises an intraocular lens optical part, a first loop structure and a second loop structure, wherein the first loop structure and the second loop structure are centrally symmetrically embedded at two sides of the intraocular lens optical part; the first loop structure and the second loop structure are completely the same and are bent in a fishhook shape, the bending angle is jointed with the trend of a tunnel between scleral layers, the front half section close to the optical part of the artificial lens is a straight line extension of a chimeric part and is positioned on the plane of the optical part of the artificial lens, the surface of the back half section far away from the optical part of the artificial lens is provided with a barb-shaped structure, and the surface of the back half section is in a spiral rising type by taking the plane of the optical part of the artificial lens as a reference. The utility model is based on the sutureless sclera fixing technique, the length and the shape of the crystal loop are more fit with the tunnel between the sclera layers, thus avoiding the breakage of the loop or the exposure of the loop caused by the irregular distortion of the loop; and the barb-shaped structure on the surface of the loop ensures that the loop has the self-fixing effect, thereby avoiding the artificial lens from inclining or shifting caused by the sliding of the loop after operation and reducing the risk of postoperative complications.

Description

Sclera self-fixing type artificial lens

Technical Field

The utility model relates to the field of medical equipment, especially, relate to a sclera is from solid stereotyping intraocular lens.

Background

The natural lens is covered by a lens capsule, while cataract is the first eye disease causing blindness in the world, and the current operation basically adopts the steps of removing turbid lens nucleus and cortex, reserving a posterior capsule membrane and implanting a posterior chamber type artificial lens. Posterior chamber intraocular lens scleral suture fixation is often chosen for cases where there is insufficient posterior capsule supporting support for trauma, dislocation of the lens, etc. However, long-term postoperative follow-up shows that suture fixing mode may cause suture-related long-term complications such as artificial lens dislocation caused by suture dissolution or fracture, endophthalmitis caused by suture exposure and the like in the future. Thus, sutureless scleral fixation intraocular lens applications have been developed in which posterior chamber intraocular lens haptics have been placed between the scleral layers by various means. However, the conventional posterior chamber intraocular lens is designed according to the situation of being inserted into the capsular bag and cannot be completely adapted to the sutureless scleral fixation, and there are reports in the literature of serious complications such as dislocation of the intraocular lens due to exposure of the intraocular lens haptics caused by such improper fitting. Thus, there is a need for an intraocular lens that is compatible with sutureless scleral immobilization.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the defects in the prior art and provides a sclera self-fixing intraocular lens which is designed according to the sutureless sclera fixing technique, the shape of a loop is attached to the tunnel trend between the sclera layers, and the breakage of the loop or the exposure of the loop caused by the irregular distortion of the loop is avoided; and the surface of the end of the loop is barbed, which is helpful for hooking scleral tissues, improves the stability and avoids the intraocular lens from inclining or shifting caused by the sliding of the loop, thereby achieving the purposes of reducing postoperative complications and improving the treatment effect.

In order to achieve the purpose, the utility model adopts the technical proposal that:

the artificial lens comprises an artificial lens optical part, a first loop structure and a second loop structure, wherein the first loop structure and the second loop structure are embedded in two sides of the artificial lens optical part in a centrosymmetric manner; the first loop structure and the second loop structure are completely the same and are bent in a fishhook shape, the bending angle is jointed with the trend of a tunnel between scleral layers, the front half section close to the optical part of the artificial lens is a straight line extension of a chimeric part and is positioned on the plane of the optical part of the artificial lens, the surface of the back half section far away from the optical part of the artificial lens is provided with a barb-shaped structure, and the surface of the back half section is in a spiral rising type by taking the plane of the optical part of the artificial lens as a reference.

Preferably, the anterior half of the first haptic structure and the anterior half of the second haptic structure are parallel to each other.

Preferably, the intraocular lens has an overall diameter of 13 mm; the diameter of the optical part of the artificial lens is 6 mm; the first haptic structure and the second haptic structure have an overall length of 12 mm.

Preferably, the material of the intraocular lens optic is a hydrophobic acrylate; the material of the first haptic structure and the second haptic structure is polymethyl methacrylate.

Preferably, the intraocular lens optic may be supplemented with blue light filtering and/or zooming features.

Preferably, the length of the area where the first and second haptic structures are fitted to the intraocular lens optic is 1 mm.

Preferably, the distance between the dividing point of the anterior half and the posterior half of the first haptic structure and the second haptic structure and the center of the intraocular lens optic is 6 mm.

Preferably, the lengths of the back half surface barb-shaped structures of the first haptic structure and the second haptic structure are 0.05-0.1 mm.

Preferably, the posterior half of the first haptic structure and the second haptic structure have a helix angle of 5 ° in a spiral ascending manner with respect to the plane of the intraocular lens optic.

The utility model adopts the above technical scheme, compare with prior art, have following technological effect:

the structure design of the utility model is based on the sutureless sclera fixation, compared with the traditional artificial lens designed based on the implantation in the capsular bag, the length and the shape of the lens loop are more fit with the tunnel between the sclera layers, thus avoiding the fracture of the loop or the exposure of the loop caused by the irregular distortion of the loop; and the barb-shaped structure on the loop surface ensures that the artificial lens has the self-fixing effect, the integral stability of the artificial lens is improved, the artificial lens inclination or displacement caused by the sliding of the loop after operation is avoided, the risk of postoperative complications is greatly reduced, and the treatment effect is effectively improved.

Drawings

Fig. 1 is a schematic top view of the overall structure of the present invention;

FIG. 2 is a schematic side view of the overall structure of the present invention;

FIG. 3 is a schematic view of a loop structure with a surface barb structure according to the present invention;

FIG. 4 is a schematic view of the present invention in practical application;

FIG. 5 is a schematic view of the present invention in practical application;

wherein the reference numerals include:

an intraocular lens optical portion 1; a first haptic structure 21; a second haptic structure 22.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

Examples

As shown in fig. 1 and 2, the present embodiment provides a scleral self-fixing type intraocular lens, which comprises an intraocular lens optical portion 1, and a first haptic structure 21 and a second haptic structure 22 embedded in the intraocular lens optical portion 1 in a centrosymmetric manner; the first loop structure 21 and the second loop structure 22 are completely the same and are bent in a fishhook shape, the bending angle is fit with the trend of scleral tunnel, the front half section close to the optical part 1 of the intraocular lens is a straight line extension of the embedding part and is positioned on the plane of the optical part 1 of the intraocular lens, the surface of the back half section far away from the optical part 1 of the intraocular lens is provided with a barb-shaped structure, and the surface of the back half section is in a spiral rising type by taking the plane of the optical part 1 of the intraocular lens as a reference.

Preferably, the anterior half of first haptic structure 21 and the anterior half of second haptic structure 22 are parallel to each other.

Preferably, the intraocular lens has an overall diameter of 13 mm; the diameter of the optical part 1 of the artificial lens is 6 mm; the overall length of the first haptic structure 21 and the second haptic structure 22 is 12 mm.

Preferably, the material of the intraocular lens optic 1 is hydrophobic acrylate; the material of the first haptic structure 21 and the second haptic structure 2 is polymethyl methacrylate.

Preferably, the intraocular lens optic 1 may be supplemented with blue light filtering and/or zooming features.

Preferably, the length of the area where the first and second

haptic structures

21 and 22 are fitted to the intraocular lens optic 1 is 1 mm.

Preferably, the distance between the dividing point of the anterior half and the posterior half of the first haptic structure 21 and the second haptic structure 22 and the center of the intraocular lens optic 1 is 6 mm.

As shown in FIG. 3, the lengths of the back half-surface barb-like structures of the first haptic structure 21 and the second haptic structure 22 are preferably 0.05 to 0.1 mm.

Preferably, the helix angle of the posterior half of the first and second

haptic structures

21 and 22 is 5 ° in a spiral-up fashion with respect to the plane of the intraocular lens optic 1.

The embodiment also provides a use method of the sclera self-fixing type artificial lens, which comprises the following steps:

as shown in FIGS. 4 and 5, after peribulbar anesthesia, a main incision of 3mm was made at the limbus 12 point and a secondary side incision was made at the limbus 10 point, and the scleral self-fixating intraocular lens was advanced from the main incision and the posterior tab was left outside the incision. A27G needle was inserted at 4 and 10 points 2mm behind the limbus at an angle of 5 degrees to the tangent plane of the insertion point, and an intrascleral tunnel parallel to the limbus was made clockwise. And (3) stretching the retinal forceps from the auxiliary side incision, respectively inserting the two loops of the intraocular lens into a 27G needle, and pulling the needle out of the eye after the butt joint is completed, namely, introducing the two loops into the scleral tunnel. The two haptics are pulled slightly out of the eye and after centering the intraocular lens, the exposed haptics are trimmed away along the scleral surface. The artificial lens with the sclera self-fixing shape is in a micro-stretching shape under the condition, and the inward pull force of the artificial lens is matched with the barb-shaped structures of the surfaces of the two loop loops facing the eyes, so that the artificial lens can hook the sclera tissue to finish self-fixing.

The above description is only an example of the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and those skilled in the art should be able to realize the equivalent alternatives and obvious variations of the present invention.

Claims

1. The sclera self-fixing type intraocular lens is characterized by comprising an intraocular lens optical part (1), and a first loop structure (21) and a second loop structure (22) which are embedded in the two sides of the intraocular lens optical part (1) in a centrosymmetric manner; the first loop structure (21) and the second loop structure (22) are completely the same and are bent in a fishhook shape, the bending angle is attached to the trend of scleral tunnel, the front half section close to the optical part (1) of the intraocular lens is linearly extended from the embedding part and is positioned on the plane of the optical part (1) of the intraocular lens, the surface of the back half section far away from the optical part (1) of the intraocular lens is provided with a barb-shaped structure, and the surface of the back half section is in a spiral rising type by taking the plane of the optical part (1) of the intraocular lens as a reference.

2. Scleral self-fixating intraocular lens according to claim 1, wherein the anterior half of the first haptic structure (21) and the anterior half of the second haptic structure (22) are parallel to each other.

3. The scleral self-fixating intraocular lens of claim 1, wherein the intraocular lens has an overall diameter of 13 mm; the diameter of the optical part (1) of the artificial lens is 6 mm; the first haptic structure (21) and the second haptic structure (22) have an overall length of 12 mm.

4. Scleral self-fixating intraocular lens according to claim 1, wherein the material of the intraocular lens optic (1) is a hydrophobic acrylate; the material of the first haptic structure (21) and the second haptic structure (22) is polymethyl methacrylate.

5. Scleral self-fixating intraocular lens according to claim 1, wherein the intraocular lens optics (1) may be additionally equipped with blue light filtering and/or zooming properties.

6. Scleral self-fixating intraocular lens according to claim 1, wherein the length of the area where the first and second haptic structures (21, 22) are fitted to the intraocular lens optic (1) is 1 mm.

7. Scleral self-fixating intraocular lens according to claim 1, wherein the first and second haptic structures (21, 22) have a boundary point in the anterior and posterior half at a distance of 6mm from the center of the intraocular lens optic (1).

8. Scleral self-fixating intraocular lens according to claim 1, wherein the length of the back half surface barb-like structures of the first haptic structure (21) and the second haptic structure (22) is 0.05-0.1 mm.

9. Scleral self-fixating intraocular lens according to claim 1, wherein the posterior half of the first (21) and second (22) haptic structures has a helix angle of 5 ° in a spiral ascending manner with respect to the plane of the intraocular lens optic (1).