Suspended intraocular lens fixed through sclera

Abstract

The utility model relates to the technical field of intraocular lenses, and discloses a sclera-fixed suspended intraocular lens, which comprises an optical zone main body, loops trisecting the circumference are arranged on the outer side of the optical zone main body, suspension holes and fixing anchors are arranged on the outer surfaces of the three loops, and fool-proof designs are arranged on the left sides of the three loops; the main body of the optical zone is made of a cross-linked polyolefin material or a hydrophobic acrylate material with good biocompatibility. The suspended intraocular lens fixed through the sclera is used for vision correction of patients with no capsular bag or insufficient capsular bag support such as serious lens dislocation, no-lens eye and complex cataract surgery by means of the optical area main body and the loop, and meanwhile, the functions of suture suspension and sclera tunnel clamping can be considered by means of the suspension hole and the fixing anchor; meanwhile, small incision implantation can be guaranteed, serious corneal astigmatism generated after operation is avoided, and the purpose of correcting or maintaining existing vision is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of artificial lenses, in particular to a suspended artificial lens fixed via the sclera. Background Art

[0002] An intraocular lens is a lens implanted in the human eye for vision correction. Its structure consists of a central main body (including the optical zone) and support loops on both sides. Most posterior chamber intraocular lenses are implanted in the capsular bag. After implantation, the intraocular lens is compressed by the capsular bag to maintain a fixed position, thereby achieving the purpose of correcting the patient's vision. However, when the lens is implanted in patients with severe lens dislocation, aphakia, weak or detached zonular ligaments, complex cataract surgery, etc., where there is no capsular bag or insufficient capsular bag support, the capsular bag implantation of the intraocular lens is very challenging, and the design requirements for the intraocular lens are also higher.

[0003] Suspended IOL implanted in the posterior chamber and fixed through the sclera is the main means of treating such patients. This method conforms to the anatomical structure of the eye, is widely applicable to patients, and can improve the best corrected visual acuity or maintain the best corrected visual acuity before surgery. During the suture fixation of transscleral posterior chamber IOL, the knot buried in the scleral flap rubs against the tissue, which may cause tissue inflammation over time, or even erosion or exposure of the knot, resulting in suture breakage. For children with soft sclera or patients who frequently rub their eyes, lens dislocation is prone to occur, leading to secondary surgery, or large incisions are required due to problems with the material itself, or vision is affected by turbidity or calcification of the material, or the lens is tilted or bent due to problems with the fixation position or suture angle. Therefore, a suspended intraocular lens fixed through the sclera has been proposed. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a suspended intraocular lens fixed through the sclera, which has the advantages of being able to take into account the functions of suture suspension and scleral tunnel clamping at the same time, while ensuring small incision implantation and avoiding severe corneal astigmatism after surgery. It solves the problem of difficulty in vision correction for patients with severe lens dislocation, aphakia, complex cataract surgery, etc., who have no capsular bag or insufficient capsular bag support.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of taking into account both the suture suspension and scleral tunnel clamping functions, ensuring small incision implantation, and avoiding severe corneal astigmatism after surgery, the utility model provides the following technical solutions: a suspended intraocular lens fixed through the sclera, comprising an optical zone main body, a loop that divides the circumference into three equal parts is arranged on the outer side of the optical zone main body, and the outer surfaces of the three loops are all provided with suspension holes and fixing anchors, and the left sides of the three loops are all provided with a fool-proof design.

[0008] As a preferred technical solution of the utility model, the optical zone body is made of a cross-linked polyolefin material, or a hydrophobic acrylic material with good biocompatibility, and its design size ranges from 8.0 mm to 6.5 mm.

[0009] The beneficial effects of the above preferred technical solution are: it can avoid the turbidity or calcification caused by the large incision of PMMA IOL or the hydrophilic acrylate material, and realize the design of intraocular lens with a larger optical zone while ensuring the incision is ≤3.0mm, thus avoiding severe postoperative corneal astigmatism.

[0010] As a preferred technical solution of the utility model, the outer surface of the loop is provided with two elliptical suspension holes, the upper ends of the suspension holes are inclined inward, the larger the radius of the optical zone body, the smaller the size of the suspension hole, and when the optical zone body is 8.0 mm, the short axis size of the suspension hole is 0.85 mm.

[0011] The beneficial effects of the above preferred technical solution are: the suspension hole can pass sutures of various thicknesses, and sutures thicker than 8-0 can be used to avoid the common suture breakage phenomenon of scleral suspension IOL, and the large hole design facilitates the doctor's surgical operation.

[0012] As a preferred technical solution of the utility model, a fixing anchor is arranged on the side of the haptic away from the main body of the optical zone, and the fixing anchor is made of a material with good elasticity and adaptability.

[0013] The beneficial effect of the above preferred technical solution is that the fixing anchor can meet the fixation mode of scleral tunnel clamping and avoid dislocation of the artificial lens.

[0014] As a preferred technical solution of the utility model, the left side of the loop is provided with a raised fool-proof design which is inconsistent with the right side.

[0015] The beneficial effect of the above preferred technical solution is: it is used to distinguish the front and back surfaces of the IOL, and when the front surface is facing upward, the fool-proof design is on the left side of the haptic.

[0016] As a preferred technical solution of the utility model, the outer side of the optical zone body may be provided with ≥3 fixed positions, and the outer side of the optical zone body may be provided with ≥3 multiple haptics by means of the fixed positions.

[0017] The beneficial effect of the above preferred technical solution is to avoid tilting and eccentricity of two-point fixation.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the utility model provides a suspended intraocular lens fixed via the sclera, which has the following beneficial effects:

[0020] This sclera-fixated suspended intraocular lens, with the help of the optical zone body and loop, is used for vision correction of patients with severe lens dislocation, aphakia, complex cataract surgery, and those without a capsular bag or with insufficient capsular bag support. At the same time, with the help of the suspension hole and the fixing anchor, it can take into account the functions of suture suspension and sclera tunnel clamping, while ensuring small incision implantation, avoiding severe corneal astigmatism after surgery, so as to achieve the purpose of correcting or maintaining existing vision. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the force analysis of the suspension hole of the utility model;

[0023] Figure 3 It is a schematic diagram of the multi-suspension loop design structure of the utility model.

[0024] In the figure: 1. Optical area body; 2. Haptic; 3. Suspension hole; 4. Fixing anchor; 5. Foolproof design. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] See also Figure 1 The sclera-fixed suspended intraocular lens comprises an optical zone main body 1, a haptic 2 which divides the circumference into three equal parts is arranged on the outer side of the optical zone main body 1, a suspension hole 3 and a fixing anchor 4 are arranged on the outer surfaces of the three haptics 2, and an anti-foolproof design 5 is arranged on the left side of the three haptics 2.

[0029] It should be noted that the material of the artificial lens is elastic. While ensuring that the tensile strength of loop 2 meets ≥ 0.25N, threading holes of sufficient size are reserved to ensure that sutures of different thicknesses can be matched to avoid product dislocation caused by suture breakage.

[0030] In this embodiment, the optical zone body 1 is made of a cross-linked polyolefin material, or a hydrophobic acrylate material with good biocompatibility, which can avoid the large incision of the PMMA IOL or the turbidity or calcification caused by the hydrophilic acrylate material. Its design size ranges from 8.0mm to 6.5mm. While ensuring that the incision is ≤3.0mm, an intraocular lens design with a larger optical zone is achieved, avoiding severe postoperative corneal astigmatism.

[0031] In this embodiment, two elliptical suspension holes 3 are provided on the outer surface of the loop 2, and the upper ends of the suspension holes 3 are inclined inward. The larger the radius of the optical zone body 1, the smaller the size of the suspension hole 3. When the optical zone body 1 is 8.0 mm, the short axis size of the suspension hole 3 is 0.85 mm.

[0032] It should be noted that the suspension hole 3 can pass sutures of various thicknesses, and sutures thicker than 8-0 can be used to avoid the common suture breakage phenomenon of scleral suspension IOL, and the large hole design facilitates the doctor's surgical operation.

[0033] In this embodiment, a fixing anchor 4 is provided on the side of the haptic 2 away from the optical zone body 1. The fixing anchor 4 is made of a material with good elasticity and adaptability. The fixing anchor 4 can meet the fixing mode of scleral tunnel clamping to avoid dislocation of the intraocular lens.

[0034] In this embodiment, a protruding fool-proof design 5 which is inconsistent with the right side is provided on the left side of the haptic 2 to distinguish the front and back surfaces of the IOL. When the front surface faces upward, the fool-proof design 5 is on the left side of the haptic 2.

[0035] See also Figure 2 Since the upper ends of the two suspension holes 3 are inclined inward, the IOL suspension hole 3 is subjected to the tension F of the suture. When the suture passes through the two symmetrical elliptical suspension holes 3, the forces on the two holes are symmetrical along the central axis. Area A is mainly subjected to the vertical force F1, and area B can bear the horizontal force F2 to offset the horizontal force on the other side, which can avoid the distortion or warping of the loop 2. When the suture is too tight, the centering stability of the optical zone can be guaranteed through its elastic deformation.

[0036] See also Figure 3 , designed for multiple suspension loops 2, retaining Figure 1 All the design points of Figure 1 All the advantages of design.

[0037] In this embodiment, the outer side of the optical zone body 1 may be provided with ≥3 fixed positions. By means of the fixed positions, the outer side of the optical zone body 1 may be provided with ≥3 haptics 2, which can avoid tilting and eccentricity caused by two-point fixation.

[0038] The beneficial effects of the above embodiments are:

[0039] With the help of the optical zone body 1 and the loop 2, it is used to correct the vision of patients with severe lens dislocation, aphakia, complex cataract surgery, etc. who have no capsular bag or insufficient capsular bag support. At the same time, with the help of the suspension hole 3 and the fixed anchor 4, it can take into account the functions of suture suspension and scleral tunnel clamping, while ensuring small incision implantation to avoid severe corneal astigmatism after surgery, so as to achieve the purpose of correcting or maintaining existing vision.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A scleral fixed suspension intraocular lens, comprising an optical zone body (1), characterized in that: The outer side of the optical zone body (1) is provided with a loop (2) dividing the circumference into three equal parts, the outer surfaces of the three loops (2) are provided with hanging holes (3) and fixing anchors (4), and the left sides of the three loops (2) are provided with a fool-proof design (5).

2. The transscleral fixed suspension intraocular lens according to claim 1, characterized in that: The optical zone body (1) is made of a cross-linked polyolefin material, or a hydrophobic acrylic material with good biocompatibility, and its design size ranges from 8.0 mm to 6.5 mm.

3. The scleral-fixated suspension intraocular lens according to claim 2, characterized in that: The outer surface of the loop (2) is provided with two elliptical suspension holes (3), the upper ends of the suspension holes (3) are inclined inwardly, the larger the radius of the optical zone main body (1), the smaller the size of the suspension hole (3), and when the optical zone main body (1) is 8.0 mm, the minor axis size of the suspension hole (3) is 0.85 mm.

4. The transscleral fixed suspension intraocular lens according to claim 1, characterized in that: A fixing anchor (4) is provided on the side of the loop (2) away from the optical zone body (1); the fixing anchor (4) is made of a material with good elasticity and adaptability.

5. The scleral-fixated suspension intraocular lens according to claim 1, characterized in that: The left side of the loop (2) is provided with a raised fool-proof design (5) which is inconsistent with the right side.

6. The transscleral fixed suspension intraocular lens according to claim 1, characterized in that: The outer side of the optical zone body (1) is further provided with ≥3 fixed positions, and the outer side of the optical zone body (1) is provided with ≥3 multiple loops (2) by means of the fixed positions.

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