A new intraocular lens fixation device and fixation method

Abstract

This invention relates to a novel intraocular lens (IOL) fixation device, comprising an implant having an anchoring portion for anchoring within the eyeball wall; a docking portion pre-connected to one end of the implant and connected to the loop of the IOL; and a traction portion pre-connected to the other end of the implant for pulling the implant from the lateral aspect of the sclera to a target position. This invention achieves "knotless" fixation, fundamentally avoiding suture-related complications. Compared to traditional transscleral suture fixation, this invention uses a mechanical anchoring method where a polymethyl methacrylate rod is heat-fused to form a flange, completely eliminating the need for knots on the scleral surface. This eliminates the risks of scleral ulceration, endophthalmitis, chronic inflammation, and late-stage lens dislocation caused by suture wear, corrosion, and exposure, significantly improving long-term stability.

Description

Technical Field

[0001] This invention relates to the field of intraocular lens technology, specifically to a novel intraocular lens fixation device and fixation method. Background Technology

[0002] Lens dislocation is mainly caused by dysfunction or rupture of the suspensory ligaments due to congenital, traumatic, or pathological factors, resulting in abnormal lens position. Currently, intraocular lens (IOL) fixation techniques for this condition are mainly divided into three categories: anterior chamber IOL implantation with iris fixation, posterior chamber IOL in situ implantation with combined capsular support device, and IOL suspension with scleral fixation.

[0003] In existing technologies, traditional suture fixation carries risks of suture knot exposure, suture breakage, and related long-term complications. While modified techniques avoid suture knots, they still cannot completely eliminate suture problems. Although sutureless interlaminar fixation (such as the Yamane procedure) avoids sutures, it is complex to operate, has a steep learning curve, and is usually only applicable to specific types of IOLs (such as three-piece IOLs), limiting its application in a wider range of clinical scenarios (such as using common one-piece IOLs). At the same time, there are still risks of IOL dislocation, increased intraocular pressure, and intraocular hemorrhage after surgery.

[0004] To address the aforementioned problems, this invention proposes a novel intraocular lens fixation device and fixation method. Summary of the Invention

[0005] (1) Technical problems to be solved

[0006] The purpose of this invention is to overcome the shortcomings of the prior art, adapt to practical needs, and provide a novel intraocular lens fixation device and fixation method to solve the above-mentioned technical problems.

[0007] (2) Technical solution

[0008] To achieve the objectives of this invention, the technical solution adopted is as follows:

[0009] A novel intraocular lens fixation device includes: an implant having an anchoring portion for anchoring within the eyeball wall; a docking portion pre-connected to one end of the implant and connected to a haptic of the intraocular lens; and a traction portion pre-connected to the other end of the implant for pulling the implant from the lateral aspect of the sclera to a target position.

[0010] Furthermore, the implant is in the shape of a long rod, and the anchoring part is a flange formed by heat-melting the end of the implant between the scleral layers.

[0011] Furthermore, the implant has a diameter of 0.14-0.19 mm and a length of 1.7-1.8 mm.

[0012] Furthermore, the docking portion is a collar formed by the first suture line.

[0013] Furthermore, the traction part is a single thread composed of a second suture.

[0014] Furthermore, both the first and second sutures are polypropylene sutures.

[0015] Furthermore, the polypropylene suture has a specification of 8-0.

[0016] The present invention also discloses a method for fixing an intraocular lens, using the intraocular lens fixing device described in any of the above claims, comprising the following steps:

[0017] Step 1: Create a puncture tunnel at the first position of the sclera, and deliver the implant and docking part into the eye, while leaving the traction part in the puncture tunnel;

[0018] Step two: Through the main corneal incision in the eye, the docking portion located inside the eye is removed and brought outside the eye, and a haptic of the artificial lens is connected to the docking portion outside the eye;

[0019] Step 3: Push the intraocular lens, which has been connected to the docking part, into the anterior chamber;

[0020] Step four: Pull the traction part that is left outside to pull the implant to the target position and complete its anchoring at the first position of the sclera;

[0021] Step 5: Repeat steps 1 to 4 at the second scleral position opposite to the first position to fix the other haptic of the intraocular lens.

[0022] Furthermore, step four includes:

[0023] By pulling the traction unit, one end of the implant is led out of the scleral tunnel;

[0024] The protruding implant tip is heat-fused to form a flange larger than the tunnel's inner diameter;

[0025] The flange is pushed back and engaged within the scleral tunnel to achieve mechanical locking.

[0026] (3) Beneficial effects:

[0027] A. This invention achieves "wireless knot" fixation, fundamentally avoiding suture-related complications. Compared to traditional transscleral suture fixation, this invention uses a mechanical anchoring method where polymethyl methacrylate rods are thermally melted to form a flange, completely eliminating the need for knots on the scleral surface. This eliminates the risks of scleral ulceration, endophthalmitis, chronic inflammation, and late-stage lens dislocation caused by suture wear, corrosion, and exposure, significantly improving long-term stability.

[0028] B. This invention simplifies the surgical procedure and reduces the risk of intraocular tissue damage. Compared with existing interscleral fixation techniques such as the Yamane procedure, this invention uses a pre-positioned docking part to connect with the lens haptic, avoiding complex and high-risk operations such as hooking and piercing the haptic inside the eye. At the same time, the traction part smoothly pulls the implant from the outside, replacing the step of forcibly pulling the lens haptic itself out of the sclera, greatly reducing the difficulty of lens haptic extraction and reducing the risk of damage and torsion to the lens haptic, as well as potential trauma to intraocular structures such as the ciliary body, making the surgery safer and more controllable.

[0029] C. This invention expands the surgical indications and broadens the scope of application. The fixation mechanism of this invention does not rely on a special material or shape of the lens haptic. Therefore, it is applicable not only to three-piece lenses but also to the more commonly used one-piece lenses in clinical practice, overcoming a key limitation of the Yamane procedure and enabling more patients without capsular support to benefit from this minimally invasive, durable fixation technique. Attached Figure Description

[0030] Figure 1 This is a front view of the fixing device of the present invention.

[0031] Figure 2 This is an exploded structural diagram of the injector of the present invention.

[0032] The attached figures are labeled as follows:

[0033] 1. Implant; 2. Connecting part; 3. Traction part; 4. Outer shell; 5. Slide; 6. Ejector pin; 7. Limiting seat; 8. Button; 9. Injection tube; 10. Puncture needle; 11. Safety plug. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1 -Appendix Figure 2 The present invention is further illustrated by the embodiments:

[0035] A novel intraocular lens fixation device includes: an implant 1 having an anchoring portion for anchoring within the eyeball wall; a docking portion 2 pre-connected to one end of the implant 1 and connected to the haptic of the intraocular lens; and a traction portion 3 pre-connected to the other end of the implant 1 for pulling the implant 1 from the lateral aspect of the sclera to a target position.

[0036] Specifically, compared to traditional transscleral suture fixation, this invention employs a mechanical anchoring method using a polymethyl methacrylate rod to form a flange through thermal fusion, completely eliminating the need for knotting on the scleral surface. This eliminates the risks of scleral ulceration, endophthalmitis, chronic inflammation, and late-stage lens dislocation caused by suture wear, corrosion, and exposure, significantly improving long-term stability. Compared to existing interscleral fixation techniques such as the Yamane procedure, this invention uses a pre-positioned docking part 2 to connect with the lens haptic, avoiding complex and high-risk operations such as hooking and piercing the haptic within the eye. Simultaneously, the traction part 3 smoothly pulls the implant 1 from the outside, replacing the step of forcibly pulling the lens haptic itself out of the sclera, greatly reducing the difficulty of lens haptic extraction and minimizing the risk of damage and torsion to the lens haptic, as well as potential trauma to intraocular structures such as the ciliary body. The surgery is safer and more controllable.

[0037] Preferably, the material of implant 1 is rigid polymethyl methacrylate.

[0038] The implant 1 is long and rod-shaped, and the anchoring part is a flange formed by heat-melting the end of the implant 1 between the scleral layers.

[0039] The diameter of implant 1 is 0.14-0.19 mm and the length is 1.7-1.8 mm.

[0040] The docking part 2 is a collar formed by the first suture line.

[0041] The traction part 3 is a single line composed of the second suture.

[0042] Both the first and second sutures are polypropylene sutures.

[0043] The specification for polypropylene sutures is 8-0.

[0044] Preferably, the first suture and the second suture are two independent sutures, which are pre-fixed to both ends of the implant 1 by surgical knotting, fixation with biocompatible adhesive or thermal fusion embedding.

[0045] The present invention also discloses a method for fixing an intraocular lens, using any of the above-mentioned intraocular lens fixing devices, comprising the following steps:

[0046] Step 1: Create a puncture tunnel of about 2 mm in length at the first position of the sclera, and deliver the implant 1 and the docking part 2 into the eye, while leaving the traction part 3 in the puncture tunnel.

[0047] In this step, the first position of the sclera is preferably located about 2 mm away from the limbus;

[0048] Step 2: Through the main corneal incision in the eye, the docking part 2 located inside the eye is removed and brought outside the eye, and a haptic of the artificial lens is connected to the docking part 2 outside the eye;

[0049] In this step, intraocular microforceps or hooks are used to enter the anterior and posterior chambers through the main incision, grasp the docking part 2, and then steadily pull it out of the eye through the main incision. Subsequently, a haptic of the intraocular lens is directly inserted or fitted into the docking part 2, and a simple knot can be tied to ensure a firm connection and prevent slippage, which avoids the key to complex intraocular operations;

[0050] Step 3: Push the intraocular lens, which has been connected to docking part 2, into the anterior chamber;

[0051] In this step, using an injector or forceps, the optical part of the intraocular lens is pushed into the anterior chamber through the main incision. At this time, the connected haptic and the implant 1 connected to it will be brought into the eye and placed near the predetermined position.

[0052] Step 4: Pull the traction part 3 that is left outside to pull the implant 1 to the target position and complete its anchoring at the first position of the sclera;

[0053] In this step, the surgeon or assistant gently pulls the traction part 3 placed in the scleral tunnel, and uses the tension transmitted by it to bring the end of the implant 1 out through the sclera.

[0054] Step 5: Repeat steps 1 to 4 at the second scleral position opposite to the first position to fix the other haptic of the intraocular lens.

[0055] Furthermore, step four includes:

[0056] By pulling the traction part 3, one end of the implant 1 is led out of the scleral tunnel;

[0057] Remove the traction part 3, trim the implant 1 to a suitable length, and heat-melt the end of the extended implant 1 to form a flange slightly larger than the inner diameter of the tunnel;

[0058] The flange is pushed back and locked into the scleral tunnel to achieve mechanical locking and fixation;

[0059] In this step, after the flange is formed but before it cools, gently push it back into the depths of the scleral tunnel using fine tweezers or a special tool. Because the flange diameter is larger than the tunnel, it will be firmly held between the scleral lamina layers, forming a stable inner anchor point. Before pushing it back, use microscissors to trim any excess traction sutures close to the base of the flange, ensuring no knots or suture ends remain on the ocular surface.

[0060] In this embodiment, as Figure 2The diagram shows the structure of the injector, which includes a housing 4. An injector tube 9 is fixedly connected to one end of the housing 4, and a puncture needle 10 is fixedly connected to the other end of the injector tube 9. A slide 5 is slidably disposed inside the cavity of the housing 4. A needle 6 is fixedly connected to one end of the slide 5 for inserting into the injector tube 9 to eject the implant 1. A limit seat 7 is fixedly connected to the inner wall of the housing 4 to prevent the needle 6 from shifting. A button 8 is fixedly connected to the top of the slide 5 and extends to the outside of the housing 4 for easy operation by the user. The surface of the housing 4 has a clearance opening for the movement of the button 8. To prevent the slide 5 from sliding accidentally due to external force, a positioning hole is opened on the surface of the slide 5. When the slide 5 is in the initial position, the positioning hole corresponds to a locking hole on the housing 4. At this time, the same safety bolt 11 is inserted into the positioning hole and the locking hole to prevent the slide 5 from moving. During the operation, the puncture needle 10 is inserted into the patient's puncture tunnel, the safety plug 11 is pulled out, and the push button 8 is pushed to move the slide 5. The slide 5 moves the ejector needle to enter the injection tube 9 and push out the implant 1.

[0061] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of the present invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A novel intraocular lens fixation device, characterized in that, include: An implant (1) having an anchoring portion for anchoring within the eyeball wall; The docking part (2) is pre-connected to one end of the implant (1) and connected to the haptic of the artificial lens; The traction part (3) is pre-connected to the other end of the implant (1) and is used to pull the implant (1) from the outside of the sclera to the target position.

2. The novel intraocular lens fixation device as described in claim 1, characterized in that: The implant (1) is in the shape of a long rod, and the anchoring part is a flange formed by heat-melting the end of the implant (1) between the scleral layers.

3. The novel intraocular lens fixation device as described in claim 2, characterized in that: The implant (1) has a diameter of 0.14-0.19 mm and a length of 1.7-1.8 mm.

4. The novel intraocular lens fixation device as described in claim 1, characterized in that: The docking part (2) is a collar made of the first suture line.

5. The novel intraocular lens fixation device as described in claim 4, characterized in that: The traction part (3) is a single line composed of a second suture.

6. The novel intraocular lens fixation device as described in claim 5, characterized in that: Both the first and second sutures are polypropylene sutures.

7. A novel intraocular lens fixation device as described in claim 6, characterized in that: The polypropylene suture has a specification of 8-0.

8. A method for fixing an intraocular lens, using the intraocular lens fixing device as described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Create a puncture tunnel at the first position of the sclera, and deliver the implant (1) and docking part (2) into the eye, while leaving the traction part (3) in the puncture tunnel; Step 2: Through the main corneal incision in the eye, the docking part (2) located inside the eye is taken out and brought to the outside of the eye, and a loop of the artificial lens is connected to the docking part (2) outside the eye. Step 3: Push the intraocular lens, which has been connected to the docking part (2), into the anterior chamber; Step 4: Pull the traction part (3) that is left outside, pull the implant (1) to the target position, and complete its anchoring at the first position of the sclera; Step 5: Repeat steps 1 to 4 at the second scleral position opposite to the first position to fix the other haptic of the intraocular lens.

9. The method for fixing an intraocular lens as described in claim 8, characterized in that, Step four includes: By pulling the traction part (3), one end of the implant (1) is led out of the scleral tunnel; The end of the protruding implant (1) is heat-fused to form a flange larger than the inner diameter of the tunnel; The flange is pushed back and engaged within the scleral tunnel to achieve mechanical locking.

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