Adjustable intraocular lens

Abstract

An adjustable intraocular lens comprising a capsule body with a cavity formed therein and a sealing valve comprising a ring body and a main body. The ring body is arranged on the capsule body, the main body is arranged in the ring body, and the hardness of the main body is less than that of the ring body.

Description

Accommodating intraocular lens

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application entitled “Adjustable Intraocular Lens” filed with the State Intellectual Property Office of China on January 3, 2024, with application number 202410008741.8, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present disclosure relates to the technical field of ophthalmic medical devices, and in particular to an adjustable intraocular lens. Background Art

[0004] Cataract extraction combined with intraocular lens implantation remains the only effective treatment for cataracts, and will continue to be for some time to come. While implanting a traditional monofocal intraocular lens after cataract surgery can provide excellent distance vision, the lack of focusing capability often leaves patients with hyperopia, requiring them to rely on glasses for various near-distance tasks.

[0005] Multifocal intraocular lenses adopt a unique optical design that can form two or more focal points in the eye at the same time. After surgery, patients can adjust the size of the pupil and select different focal points to meet the needs of far and near vision, reducing the rate of cataract patients wearing glasses after surgery. However, the existence of multiple focal points at the same time will cause problems such as halos and glare to patients.

[0006] In recent years, many researchers have attempted to design accommodative intraocular lenses (IOLs). By varying the volume or type of optical fluid (e.g., silicone oil) within the capsular bag, and thereby changing the shape or optical path of the IOL itself, the IOL's refractive power can be adjusted. However, how to inject the optical fluid into the lens and achieve a seal remains a challenge for those skilled in the art.

[0007] Public content

[0008] The present disclosure aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present disclosure is to provide an adjustable intraocular lens that can change its shape or optical path, thereby adjusting the diopter of the intraocular lens.

[0009] The accommodating intraocular lens according to an embodiment of the present disclosure includes a capsule having a chamber formed therein; and

[0010] The sealing valve comprises a ring body and a body, wherein the ring body is arranged on the capsule, and the body is arranged in the ring body, and the hardness of the body is smaller than the hardness of the ring body.

[0011] Thus, by adjusting the amount of optical fluid filled in the capsule or changing the type of optical fluid, the IOL's shape or optical path can be altered, thereby adjusting the IOL's diopter. Furthermore, the provision of a sealing valve on the capsule facilitates the injection of the optical fluid into the capsule while preventing leakage, thereby ensuring the reliability and safety of the IOL.

[0012] According to some embodiments of the present disclosure, the ring body is a hard silicone body, and the main body is a soft silicone body.

[0013] According to some embodiments of the present disclosure, the hardness of the ring body is between Shore 80A-90A, and the hardness of the main body is between Shore 20A-40A.

[0014] According to some embodiments of the present disclosure, the hardness of the body is less than or equal to the hardness of the capsule.

[0015] According to some embodiments of the present disclosure, there are two sealing valves, and the two sealing valves are symmetrically arranged about the central axis of the capsule.

[0016] According to some embodiments of the present disclosure, a groove that is recessed inwardly toward the chamber is provided in the middle portion of the sac body, and the sealing valve is spaced apart from the groove.

[0017] According to some embodiments of the present disclosure, the bottom of the groove is configured as an optical convex mirror.

[0018] According to some embodiments of the present disclosure, the capsule includes a front capsule and a rear capsule, and the front capsule and the rear capsule are connected;

[0019] The adjustable intraocular lens also includes a haptic, which includes: a front connecting arm, a rear connecting arm and a free end, the front connecting arm is connected to the outer surface of the anterior capsule, the rear connecting arm is connected to the outer surface of the posterior capsule, the ends of the front connecting arm and the rear connecting arm form the free end, and there is an angle between the front connecting arm and the rear connecting arm.

[0020] According to some embodiments of the present disclosure, the capsule has an equator, and the connection between the front capsule and the rear capsule avoids the equator.

[0021] According to some embodiments of the present disclosure, 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.

[0022] According to some embodiments of the present disclosure, a parylene layer is further included, and the parylene layer is disposed on the outer surface of the sealing valve.

[0023] According to some embodiments of the present disclosure, the parylene layer also partially covers the outer surface of the body.

[0024] Additional aspects and advantages of the present disclosure will be given in part in the description that follows and, in part, will be obvious from the description that follows, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] FIG1 is a schematic structural diagram of a capsule according to an embodiment of the present disclosure;

[0027] FIG2 is an enlarged view of a sealing valve according to an embodiment of the present disclosure;

[0028] FIG3 is a schematic diagram of a structure with two sealing valves according to an embodiment of the present disclosure;

[0029] FIG4 is a schematic diagram of a structure in which an optical convex mirror is included on a capsule according to an embodiment of the present disclosure;

[0030] FIG5 is a schematic structural diagram of the entire haptic on an intraocular lens according to an embodiment of the present disclosure;

[0031] FIG6 is a schematic structural diagram of the separation of the front capsule and the rear capsule according to an embodiment of the present disclosure;

[0032] FIG7 is a schematic diagram of the structure of the front capsule and the rear capsule according to an embodiment of the present disclosure;

[0033] FIG8 is a cross-sectional view of an intraocular lens according to an embodiment of the present disclosure;

[0034] FIG9 is a schematic diagram of the structure of an intraocular lens in an eye according to an embodiment of the present disclosure.

[0035] Figure numerals: 100, intraocular lens; 10, capsule; 101, chamber; 11, groove; 12, anterior capsule; 13, posterior capsule; 14, equator; 15, optical convex lens; 20, sealing valve; 21, ring body; 22, body; 30, haptic; 31, anterior connecting arm; 32, posterior connecting arm; 33, free end; 40, suture line. DETAILED DESCRIPTION

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

[0037] The following describes an adjustable intraocular lens 100 according to an embodiment of the present disclosure with reference to Figures 1 to 9, which includes a capsule 10 and a sealing valve 20. A chamber 101 is formed in the capsule 10. The sealing valve 20 includes a ring body 21 and a body 22. The ring body 21 is arranged on the capsule 10, and the body 22 is arranged in the ring body 21. The hardness of the body 22 is less than the hardness of the ring body 21.

[0038] Specifically, as shown in FIG1 , an adjustable intraocular lens 100 primarily comprises a capsule 10 and a sealing valve 20. A chamber 101 is formed within the capsule 10, which can be filled with an optical fluid medium (e.g., silicone oil). By adjusting the amount of optical fluid filled or changing the type of optical fluid, the shape or optical path of the intraocular lens 100 can be changed, thereby adjusting the diopter of the intraocular lens 100. Furthermore, a sealing valve 20 is provided on the capsule 10. The sealing valve 20 is annular in shape. Because the hardness of the body 22 of the sealing valve 20 is less than that of the ring 21, the injection needle is easily inserted into the body 22, thereby filling the capsule 10 with the optical fluid medium. Once the injection is complete and the injection needle is withdrawn, the sealing valve 20 seals the optical fluid medium within the capsule 10, preventing leakage of the optical fluid medium and thus ensuring the reliability and safety of the intraocular lens 100.

[0039] As shown in Figures 1 and 2, the ring body 21 is a hard silicone body, and the main body 22 is a soft silicone body. Among them, the main body 22 of the sealing valve 20 is set to a soft silicone body, which can facilitate the injection needle to penetrate the soft silicone body and inject the optical fluid medium. Since the soft silicone body will undergo elastic deformation, when the injection needle is pulled out of the soft silicone body, the soft silicone body will close itself, thereby preventing the leakage of the optical fluid medium. Moreover, the soft silicone body is arranged in the ring body 21, and the ring body 21 is a hard silicone body. The hard silicone body can support the sealing valve 20, thereby avoiding deformation of the sealing valve 20 on the capsule 10. The organic combination of soft and hard silicone bodies can form a closed whole. Furthermore, the hard silicone body can exert a force on the soft silicone body, thereby improving the sealing performance of the sealing valve 20 to the optical fluid medium.

[0040] As shown in Figure 2 , the hardness of the ring body 21 is between 80A and 90A on the Shore Scale, and the hardness of the body 22 is between 20A and 40A on the Shore Scale. Specifically, the hardness of the ring body 21 is between 80A and 90A on the Shore Scale, and the hardness of the body 22 is between 20A and 40A on the Shore Scale, which can prevent deformation of the body 22 and the capsule 10. The body 22 and the capsule 10 are preferably made of the same material for ease of processing and manufacturing.

[0041] As shown in Figure 3, there are two sealing valves 20, and the two sealing valves 20 are symmetrically arranged about the central axis of the capsule 10. Specifically, there are two sealing valves 20, one of which can be used for injection, and the other plays a role of compensation and balance in mechanics, and can also be used as a spare valve body. Moreover, the two sealing valves 20 can be set at different positions on the capsule 10, so that different injection paths can be formed, and injection can be performed in different directions, which is convenient for flexible operation. Preferably, the two sealing valves 20 are symmetrically arranged about the central axis of the capsule 10, so that the optical area on the upper surface of the capsule 10 can produce uniform deformation.

[0042] In addition, intraocular lens 100 includes a parylene layer (not shown). This parylene layer (preferably parylene C, which can be vapor-deposited) is deposited on the outer surface of sealing valve 20. The parylene layer has a significantly higher Young's modulus and hardness than sealing valve 20. Furthermore, the parylene layer adheres well to sealing valve 20, effectively creating a reinforcing barrier around the valve 20. Therefore, when the injection needle is withdrawn, the optical fluid (e.g., silicone oil) within sealing valve 20 exerts outward pressure on the valve. This outward pressure causes the valve 20 to self-seal under the protection of the rigid parylene layer, ensuring a long-term leak-proof seal.

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

[0044] As shown in Figure 3, the central portion of the capsule 10 is provided with a recessed groove 11, recessed inwardly toward the chamber 101. The sealing valve 20 is spaced apart from the recessed groove 11. The presence of the recessed groove 11 in the anterior central portion of the capsule 10 reduces contact between the intraocular lens 100 and the anterior wall of the lens capsule, thereby preventing interference with the optical path. The presence of the recessed groove 11 in the posterior central portion of the capsule 10 also reduces contact between the intraocular lens 100 and the posterior wall of the lens capsule, thereby preventing the effects of foreign tissue proliferation. The spacing of the sealing valve 20 from the recessed groove 11 further reduces stress concentration.

[0045] As shown in FIG4 , the bottom of groove 11 is constructed as an optical convex mirror 15. This optical convex mirror 15 facilitates focusing and can be configured as needed. Optical convex mirror 15 is preferably a PMMA (polymethyl methacrylate) film layer, which has high transparency and a low refractive index. The hardness of optical convex mirror 15 is between 80A and 90A on the Shore Scale, thereby preventing deformation of the PMMA film layer.

[0046] As shown in Figures 5 and 6, capsule 10 includes an anterior capsule 12 and a posterior capsule 13, which are connected to each other. Accommodating intraocular lens 100 also includes a haptic 30, which includes an anterior connecting arm 31, a posterior connecting arm 32, and a free end 33. Anterior connecting arm 31 is connected to the outer surface of anterior capsule 12, and posterior connecting arm 32 is connected to the outer surface of posterior capsule 13. The ends of anterior connecting arm 31 and posterior connecting arm 32 form free end 33, and an angle is formed between anterior connecting arm 31 and posterior connecting arm 32.

[0047] The haptic 30 is arranged on the capsule 10. The haptic 30 is mainly composed 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 haptic 30 is Y-shaped as a whole. The specific connection position can be verified through mechanical simulation analysis and experiments, and the optimal force position can be found as the connection position of the haptic 30. During refractive adjustment, the structural design of the front connecting arm 31 and the rear connecting arm 32 having an angle can facilitate the force balance of the capsule 10 during refractive adjustment, and can also achieve controllable deformation, thereby increasing the accuracy and effectiveness of refractive adjustment. Furthermore, the haptic 30 can be made into a front connecting arm 31 and a rear connecting arm 32, and then the free ends 33 of the front connecting arm 31 and the rear connecting arm 32 are bonded with silicone. Alternatively, as shown in FIG5 , the haptic 30 may be made into a whole using a stainless steel mold, and then bonded to the anterior capsule 12 and the posterior capsule 13 using silicone rubber, thereby improving the manufacturing efficiency of the intraocular lens 100 .

[0048] As shown in FIG6 , the capsule 10 has an equator 14. The junction of the anterior capsule 12 and the posterior capsule 13 avoids the equator 14, meaning the area of ​​the junction is smaller than the area of ​​the equator 14. The capsule 10 is an asymmetric ellipsoid, with the latitude increasing from front to back, reaching a maximum, and then decreasing again toward the back. This intermediate maximum is the equator 14. Because the equator 14 is prone to stress concentration or slight deformation, which can affect refractive effect, the junction of the anterior capsule 12 and the posterior capsule 13 is arranged away from the equator 14 to prevent deformation of the capsule 10.

[0049] As shown in Figure 7, 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 symmetrical arrangement of the anterior connecting arm 31 and the posterior connecting arm 32 can ensure a more balanced force on the capsule 10 during diopter adjustment, facilitate actual operation, and thus improve the reliability of the intraocular lens 100.

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

Claims

1. An adjustable intraocular lens (100), characterized in that, Comprising: A bladder (10) having a chamber (101) formed therein; and A sealing valve (20) comprising an annular body (21) and a body (22), the annular body (21) being disposed on the bladder (10), the body (22) being disposed within the annular body (21), and the hardness of the body (22) being less than the hardness of the annular body (21).

2. The adjustable intraocular lens (100) according to claim 1, wherein, The annular body (21) is a hard silicone body and the body (22) is a soft silicone body.

3. The adjustable intraocular lens (100) according to claim 2, characterized in that, The hardness of the annular body (21) is between Shore 80A - 90A, and the hardness of the body (22) is between Shore 20A - 40A.

4. The adjustable intraocular lens (100) according to any one of claims 1-3, characterized in that, The hardness of the body (22) is less than or equal to the hardness of the bladder (10).

5. The adjustable intraocular lens (100) according to any one of claims 1-4, characterized in that, The number of the sealing valves (20) is two, and the two sealing valves (20) are symmetrically arranged about the central axis of the bladder (10).

6. The adjustable intraocular lens (100) according to any one of claims 1-5, characterized in that, A groove (11) that is recessed inwardly toward the chamber (101) is provided in the middle of the bladder (10), and the sealing valve (20) is spaced apart from the groove (11).

7. The adjustable intraocular lens (100) according to claim 6, characterized in that, The bottom of the groove (11) is configured as an optical convex lens (15).

8. The adjustable intraocular lens (100) according to any one of claims 1-7, characterized in that, The bladder (10) includes a front bladder (12) and a rear bladder (13), and the front bladder (12) and the rear bladder (13) are connected; The adjustable intraocular lens (100) further includes a haptic (30), the haptic (30) including a front connecting arm (31), a rear connecting arm (32) and a free end (33), the front connecting arm (31) being connected to the outer surface of the front bladder (12), the rear connecting arm (32) being connected to the outer surface of the rear bladder (13), the ends of the front connecting arm (31) and the rear connecting arm (32) forming the free end (33), and there being an angle between the front connecting arm (31) and the rear connecting arm (32).

9. The adjustable intraocular lens (100) according to claim 8, wherein The bladder (10) has an equator (14), and the connection between the front bladder (12) and the rear bladder (13) avoids the equator (14).

10. The adjustable intraocular lens (100) according to claim 8 or 9, characterized in that, The connection between the front connecting arm (31) and the front bladder (12) is located at half the thickness of the front bladder (12), and the connection between the rear connecting arm (32) and the rear bladder (13) is located at half the thickness of the rear bladder (13).

11. The adjustable intraocular lens (100) according to any one of claims 1-10, characterized in that, Also included is a parylene layer disposed on the outer surface of the sealing valve (20).

12. The adjustable intraocular lens (100) according to claim 11, characterized in that, The parylene layer also partially covers the outer surface of the body (22).

Images