Adjustable intraocular lens

Abstract

This invention discloses an adjustable intraocular lens (IOL) comprising: a capsule with a cavity formed therein; and a sealing valve comprising: a ring and a body, the ring being disposed on the capsule and the body being disposed within the ring, the body having a lower hardness than the ring. This allows for modification of the IOL's shape or optical path, thereby adjusting its refractive power. Furthermore, the sealing valve's inclusion of a ring and a body facilitates the injection of optical fluid into the capsule and prevents leakage of the optical fluid, thus ensuring the reliability and safety of the IOL.

Description

Technical Field

[0001] This invention relates to the field of ophthalmic medical device technology, and in particular to an adjustable intraocular lens. Background Technology

[0002] Cataract extraction combined with intraocular lens implantation remains the only effective treatment for cataracts for the foreseeable future. While implantation of a traditional monofocal intraocular lens after cataract surgery can provide excellent distance vision, the lack of focusing capability of monofocal intraocular lenses generally results in postoperative hyperopia, requiring patients to rely on glasses for various close-range tasks.

[0003] Multifocal intraocular lenses employ a unique optical design that can simultaneously form two or more focal points within the eye. After surgery, patients can adjust the size of their pupils to select different focal points to meet their needs for both near and far vision, thus reducing the rate of wearing glasses after cataract surgery. However, the presence of multiple focal points can cause drawbacks such as halos and glare for patients.

[0004] In recent years, many scholars have attempted to design adjustable intraocular lenses (IOLs) by altering the amount or type of optical fluid medium (such as silicone oil) within the capsular bag, thereby changing the shape or optical path of the IOL itself to adjust its refractive power. However, how to inject the optical fluid medium into the lens and seal it effectively remains a challenge for those skilled in the art. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an adjustable intraocular lens that can change its shape or light path, thereby adjusting the refractive power of the intraocular lens.

[0006] An adjustable intraocular lens according to an embodiment of the present invention includes: a capsule, wherein a chamber is formed within the capsule; and

[0007] A sealing valve, comprising: a ring body and a body, wherein the ring body is disposed on the bladder body and the body body is disposed within the ring body, and the hardness of the body body is less than the hardness of the ring body.

[0008] Therefore, by adjusting the amount or type of optical fluid medium within the capsule, the shape or optical path of the intraocular lens can be altered, thereby adjusting its refractive power. Furthermore, the sealing valve on the capsule facilitates the injection of the optical fluid medium and prevents leakage, thus ensuring the reliability and safety of the intraocular lens.

[0009] According to some embodiments of the present invention, the ring body is a hard silicone body, and the body is a soft silicone body.

[0010] According to some embodiments of the present invention, the hardness of the ring is between Shore 80A and 90A, and the hardness of the body is between Shore 20A and 40A.

[0011] According to some embodiments of the present invention, the hardness of the body is less than or equal to the hardness of the capsule.

[0012] According to some embodiments of the present invention, the number of sealing valves is two, and the two sealing valves are symmetrically arranged about the central axis of the bladder.

[0013] According to some embodiments of the present invention, the middle part of the bladder is provided with a groove that is recessed toward the cavity, and the sealing valve is spaced apart from the groove.

[0014] According to some embodiments of the present invention, the bottom of the groove is configured as an optical convex lens.

[0015] According to some embodiments of the present invention, the capsule includes an anterior capsule and a posterior capsule, the anterior capsule and the posterior capsule being connected;

[0016] The adjustable intraocular lens further includes a haptic body, which includes an anterior connecting arm, a posterior connecting arm, and a free end. The anterior connecting arm is connected to the outer surface of the anterior capsule, and the posterior connecting arm is connected to the outer surface of the posterior capsule. The ends of the anterior connecting arm and the posterior connecting arm form the free end, and there is an included angle between the anterior connecting arm and the posterior connecting arm.

[0017] According to some embodiments of the present invention, the capsule has an equator, and the junction of the anterior capsule and the posterior capsule avoids the equator.

[0018] According to some embodiments of the present invention, the connection between the anterior connecting arm and the anterior capsule is located at half the thickness of the anterior capsule; the connection between the posterior connecting arm and the posterior capsule is located at half the thickness of the posterior capsule.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the structure of the capsule according to an embodiment of the present invention;

[0022] Figure 2 This is an enlarged view of the sealing valve according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of a structure in which two sealing valves are provided according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of a capsule containing an optical convex lens according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the entire haptic structure of an intraocular lens according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the separation of the anterior capsule and the posterior capsule according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the anterior capsule and posterior capsule in conjunction according to an embodiment of the present invention;

[0028] Figure 8 This is a cross-sectional view of an intraocular lens according to an embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of an intraocular lens in the eye according to an embodiment of the present invention.

[0030] Figure label:

[0031] 100. Intraocular lens;

[0032] 10. Capsule body; 101. Chamber; 11. Groove; 12. Anterior capsule body; 13. Posterior capsule body; 14. Equator; 15. Optical convex lens;

[0033] 20. Sealing valve; 21. Ring body; 22. Body;

[0034] 30. Loop body; 31. Front connecting arm; 32. Rear connecting arm; 33. Free end;

[0035] 40. Seam thread. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below, and the embodiments described with reference to the accompanying drawings are exemplary.

[0037] The following is for reference. Figures 1-9 An adjustable intraocular lens 100 according to an embodiment of the present invention is described, comprising: a capsule 10 and a sealing valve 20, wherein a chamber 101 is formed within the capsule 10, and the sealing valve 20 comprises: an annular body 21 and a body 22, wherein the annular body 21 is disposed on the capsule 10, and the body 22 is disposed within the annular body 21, wherein the hardness of the body 22 is less than the hardness of the annular body 21.

[0038] Specifically, such as Figure 1 As shown, the adjustable intraocular lens 100 mainly consists of a capsule 10 and a sealing valve 20. A chamber 101 is formed inside the capsule 10, which can be filled with an optical fluid medium (silicone oil). By adjusting the filling amount of the optical fluid medium or changing the type of the optical fluid medium, the shape or optical path of the intraocular lens 100 itself can be changed, thereby adjusting the refractive power of the intraocular lens 100. Furthermore, a sealing valve 20 is provided on the capsule 10. The sealing valve 20 is annular. Since the hardness of the body 22 in the sealing valve 20 is less than the hardness of the ring 21, it is easy for the injection needle to be inserted into the body 22, so that the optical fluid medium can be filled into the capsule 10. After the injection is completed and the injection needle is withdrawn, the sealing valve 20 can seal the optical fluid medium in the capsule 10 to prevent leakage of the optical fluid medium, thereby ensuring the reliability and safety of the intraocular lens 100.

[0039] like Figure 1 and Figure 2 As shown, the ring 21 is made of hard silicone, and the body 22 is made of soft silicone. The body 22 of the sealing valve 20 is made of soft silicone, which facilitates the insertion of the injection needle into the soft silicone to inject the optical fluid medium. Because the soft silicone undergoes elastic deformation, it self-closes when the injection needle is withdrawn, preventing leakage of the optical fluid medium. Furthermore, the soft silicone is located inside the ring 21, which is made of hard silicone. The hard silicone supports the sealing valve 20, preventing deformation at the sealing valve 20 on the capsule 10. The combination of soft and hard silicone forms a closed system. Additionally, the hard silicone exerts force on the soft silicone, improving the sealing performance of the sealing valve 20 for the optical fluid medium.

[0040] like Figure 2 As shown, the hardness of the ring 21 is between Shore 80A and 90A, and the hardness of the body 22 is between Shore 20A and 40A. Specifically, the hardness of the ring 21 is between Shore 80A and 90A, and the hardness of the body 22 is between Shore 20A and 40A, which can prevent deformation of the body 22 and the capsule 10. Preferably, the body 22 and the capsule 10 are made of the same material, which facilitates processing and manufacturing.

[0041] like Figure 3As shown, there are two sealing valves 20, which are symmetrically arranged about the central axis of the capsule 10. Specifically, there are two sealing valves 20; one can be used for injection, and the other plays a mechanical compensating and balancing role, and can also serve as a backup valve. Moreover, the two sealing valves 20 can be set at different positions on the capsule 10, thus forming different injection paths and allowing injection in different directions, which facilitates flexible operation. Preferably, the two sealing valves 20 are symmetrically arranged about the central axis of the capsule 10, which can produce uniform deformation of the optical area on the upper surface of the capsule 10.

[0042] In addition, the intraocular lens 100 also includes a phenelzine layer (not shown in the figure). The phenelzine layer (preferably phenelzine C, and can be produced using a vapor deposition process) is disposed on the outer surface of the sealing valve 20. The Young's modulus and hardness of the phenelzine layer are significantly higher than those of the sealing valve 20. Moreover, the phenelzine layer has good adhesion to the sealing valve 20, which is equivalent to adding a reinforcing baffle to the outside of the sealing valve 20. Therefore, when the injection needle is withdrawn, the optical fluid medium (such as silicone oil) inside the sealing valve 20 can generate outward pressure on the sealing valve 20. This outward pressure can cause the sealing valve 20 to self-close under the protection of the rigid phenelzine layer, thereby providing a long-term sealing and leak-proof function.

[0043] Furthermore, the pyrene layer covers the outer surface of the sealing valve 20, and also partially covers the outer surface of the body 22, increasing the contact area between the pyrene layer and the sealing valve 20, and preventing stress concentration at the connection between the sealing valve 20 and the bladder 10.

[0044] like Figure 3 As shown, the capsule 10 has a groove 11 recessed into the cavity 101 in the middle. The sealing valve 20 is spaced apart from the groove 11. The groove 11 in the middle of the front side of the capsule 10 can reduce the tissue contact between the artificial lens 100 and the anterior wall of the lens capsule, thereby avoiding interference with the optical path. The groove 11 in the middle of the rear side of the capsule 10 can reduce the tissue contact between the artificial lens 100 and the posterior wall of the lens capsule and avoid the influence of allogeneic tissue hyperplasia. The optical path sealing valve 20 is spaced apart from the groove 11, which can further avoid stress concentration.

[0045] like Figure 4 As shown, the bottom of the groove 11 is constructed as an optical convex lens 15, which can help with focusing and can be set according to actual needs. The optical convex lens 15 is preferably a PMMA (polymethyl methacrylate) film layer, which has the characteristics of high transparency and low refractive index. The hardness of the optical convex lens 15 is between Shore 80A and 90A, thereby preventing deformation of the PMMA film layer.

[0046] like Figure 6 As shown, the capsule 10 includes an anterior capsule 12 and a posterior capsule 13, which are connected together. The adjustable intraocular lens 100 also includes a haptic body 30, which includes an anterior connecting arm 31, a posterior connecting arm 32, and a free end 33. The anterior connecting arm 31 is connected to the outer surface of the anterior capsule 12, and the posterior connecting arm 32 is connected to the outer surface of the posterior capsule 13. The ends of the anterior connecting arm 31 and the posterior connecting arm 32 form a free end 33, and there is an angle between the anterior connecting arm 31 and the posterior connecting arm 32.

[0047] The loop 30 is mounted on the capsule 10. The loop 30 mainly consists of a front connecting arm 31, a rear connecting arm 32, and a free end 33. The front connecting arm 31 is connected to the outer surface of the front capsule 12, and the rear connecting arm 32 is connected to the outer surface of the rear capsule 13. The loop 30 is Y-shaped overall. The specific connection position can be determined through mechanical simulation analysis and experimental verification to find the optimal stress position for the loop 30. In refractive adjustment, the angled structure of the front connecting arm 31 and the rear connecting arm 32 facilitates balanced stress on the capsule 10 during refractive adjustment and allows for controllable deformation, thereby increasing the accuracy and effectiveness of refractive adjustment. Furthermore, the loop 30 can be fabricated as a separate unit, with the front connecting arm 31 and the rear connecting arm 32. Then, the free ends 33 of the front connecting arm 31 and the rear connecting arm 32 are bonded together with silicone, or as... Figure 5 As shown, the haptic 30 can also be made into a single piece using a stainless steel mold, and then bonded to the anterior capsule 12 and posterior capsule 13 respectively using silicone, thereby improving the manufacturing efficiency of the artificial lens 100.

[0048] like Figure 6 As shown, the capsule 10 has an equator 14. The connection between the anterior capsule 12 and the posterior capsule 13 avoids the equator 14, meaning the area of ​​the connection between the anterior capsule 12 and the posterior capsule 13 is smaller than the area of ​​the equator 14. The capsule 10 is an asymmetrical ellipsoid, with its diameter increasing from front to back. After reaching its maximum value, it begins to decrease backward. This maximum value is the equator 14. Because stress concentration or slight deformation is prone to occur at the equator 14, affecting the refractive effect, the connection between the anterior capsule 12 and the posterior capsule 13 is designed to avoid the equator 14, thus preventing deformation of the capsule 10.

[0049] like Figure 7As shown, the connection between the anterior connecting arm 31 and the anterior capsule 12 is located at half the thickness of the anterior capsule 12, and the connection between the posterior connecting arm 32 and the posterior capsule 13 is located at half the thickness of the posterior capsule 13. Specifically, the anterior connecting arm 31 is located at half the thickness of the anterior capsule 12, and the posterior connecting arm 32 is located at half the thickness of the posterior capsule 13. The anterior connecting arm 31 and the posterior connecting arm 32 are symmetrically arranged, which makes the capsule 10 more evenly stressed during refractive adjustment and easier to operate, thereby improving the reliability of the intraocular lens 100.

[0050] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An accommodating intraocular lens, characterized in that include: A capsule, wherein a cavity is formed within the capsule; as well as A sealing valve, comprising: a ring body and a body, wherein the ring body is disposed on the bladder body and the body is disposed within the ring body, and the hardness of the body is less than the hardness of the ring body; The ring is made of hard silicone, the body is made of soft silicone, and the body and the capsule are made of the same material. The capsule includes an anterior capsule and a posterior capsule, which are connected to each other. The adjustable intraocular lens further includes a haptic body, the haptic body including an anterior connecting arm, a posterior connecting arm and a free end, the anterior connecting arm being connected to the outer surface of the anterior capsule, the posterior connecting arm being connected to the outer surface of the posterior capsule, the ends of the anterior connecting arm and the posterior connecting arm forming the free end, and the anterior connecting arm and the posterior connecting arm having an included angle. The free end is constructed in an arc shape and is arranged around the capsule. The width of the end of the front connecting arm that is connected to the front capsule increases in the direction close to the front capsule. The width of the end of the rear connecting arm that is connected to the rear capsule increases in the direction close to the rear capsule. The capsule has an equator, and the junction of the anterior capsule and the posterior capsule avoids the equator.

2. The accommodating intraocular lens of claim 1, wherein, The hardness of the ring is between Shore A 80A and 90A, and the hardness of the body is between Shore A 20A and 40A.

3. The accommodating intraocular lens of claim 1, wherein The number of sealing valves is two, and the two sealing valves are symmetrically arranged about the central axis of the bladder.

4. The accommodating intraocular lens according to any one of claims 1 to 3, characterized in that The bladder body has a groove in the middle that is recessed into the cavity, and the sealing valve is spaced apart from the groove.

5. The accommodating intraocular lens of claim 4, wherein, The bottom of the groove is constructed as an optical convex lens.

6. The accommodating intraocular lens of claim 1, wherein, The connection between the front connecting arm and the front capsule is located at half the thickness of the front capsule; the connection between the rear connecting arm and the rear capsule is located at half the thickness of the rear capsule.

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