Openable vitreous cavity crystal shedding blocking device for cataract surgery

Abstract

The invention discloses an expandable vitreous cavity crystal shedding blocking device for cataract surgery, relates to the technical field of cataract surgery auxiliary instruments, and provides the following scheme that the expandable vitreous cavity crystal shedding blocking device comprises a blocking net injection mechanism, and the front end of the blocking net injection mechanism is connected with a crystalline lens blocking net; and the barrier net injection mechanism comprises an outer sleeve. A spiral transmission structure of the screwing pipe and the outer sleeve is combined with a linkage mechanism of the transmission rod and the traction block, control over the crystalline lens blocking net by the medical steel wire is achieved, the medical-grade polycarbonate oval outer ring and the medical-grade polycarbonate oval inner ring can be unfolded or folded according to needs, a stable bearing concave face can be formed in an operation to prevent a crystalline lens from falling off, and the use effect of the medical-grade polycarbonate oval outer ring and the medical-grade polycarbonate oval inner ring is improved. In addition, numerical value marks of the observation opening provide visual screwing depth reference for doctors, and the postoperative infection risk is reduced by combining tight sealing of liquid in the eyes through the sealing ring.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary instruments for cataract surgery, and in particular to an expandable vitreous cavity lens loss blocking device used in cataract surgery. Background Art

[0002] During complex cataract surgery, the posterior capsule of the lens may rupture during the operation. Some patients with special medical histories, such as a history of eye acupuncture, may have posterior capsule rupture before surgery. The lens of these patients may fall into the vitreous cavity during surgery, increasing the risk of secondary surgery for the patient and hindering postoperative recovery.

[0003] Therefore, the present invention provides an expandable vitreous cavity lens loss blocking device for cataract surgery, which is intended to provide stable and precise lens support during cataract surgery, reduce surgical risks, reduce complications, and improve surgical success rate. Summary of the Invention

[0004] In view of the defects of the above-mentioned background technology proposed in claim 2, a technical solution of an expandable vitreous cavity lens loss blocking device for cataract surgery is provided.

[0005] It includes a barrier net push injection mechanism, the front end of which is connected to a lens barrier net; the barrier net push injection mechanism includes an outer sleeve, a screw tube rotatably arranged in the rear port of the outer sleeve, and a quartz tube fixedly connected to the front port of the outer sleeve, the outer ring surface of the screw tube is provided with a spiral pattern, the rear port of the outer sleeve is fixed with a slider coupled to the spiral pattern, the front end of the screw tube is fixedly connected to a transmission rod, and the front end of the transmission rod is rotatably connected to a pulling block;

[0006] The front end of the quartz tube is fixedly connected to a barrier net receiving and releasing nozzle, and the front end surface of the barrier net receiving and releasing nozzle is provided with a receiving and releasing opening for the lens barrier net to enter and exit; the front end of the transmission rod is fixedly connected to a rotating piece inserted into the rear interior of the pulling block, and the rear interior of the pulling block is provided with a cavity for the rotating piece to be inserted and rotated;

[0007] The lens barrier net includes a medical steel wire connected to the front end of the pulling block, a medical-grade polycarbonate elliptical outer ring fixedly connected to the front end of the medical steel wire, and 30-36 medical-grade polycarbonate elliptical inner rings are fixed in a circular array inside the medical-grade polycarbonate elliptical outer ring, and the medical-grade polycarbonate elliptical inner rings are arranged to cross each other, wherein the area where the medical-grade polycarbonate elliptical inner rings cross each other forms a diamond-shaped space that can be deformed outward or inward.

[0008] In the above-mentioned technical solution of an expandable vitreous cavity lens loss barrier device for cataract surgery, preferably: the medical-grade polycarbonate elliptical outer ring and the medical-grade polycarbonate elliptical inner ring are located below the lens, the outer ends of the medical-grade polycarbonate elliptical inner ring are respectively fixedly connected to the inner surface of the medical-grade polycarbonate elliptical outer ring, and the inner end of the medical-grade polycarbonate elliptical inner ring is recessed downward to form a concave surface for supporting the lens.

[0009] In the above-mentioned technical solution of an expandable vitreous cavity lens loss barrier device for cataract surgery, preferably: the medical-grade polycarbonate elliptical inner ring is elliptical, and the medical-grade polycarbonate elliptical inner ring and the medical-grade polycarbonate elliptical outer ring both have memory properties, which are used to maintain the concave state of the supporting lens after expansion.

[0010] In the above-mentioned technical solution of the expandable vitreous cavity lens loss barrier device for cataract surgery, preferably: the outer ring surface of the screw tube is spirally engraved with a length value, and an observation port for observing the value is provided on the rear side wall of the outer sleeve.

[0011] In the above-mentioned technical solution of an expandable vitreous cavity lens loss blocking device for cataract surgery, preferably: the screw tube is fixedly connected to a screw end on the end on the rear side of the outer sleeve, and a plurality of anti-slip grooves are provided on the outer surface of the screw end.

[0012] In the above-mentioned technical solution of the expandable vitreous cavity lens loss blocking device for cataract surgery, preferably: an annular groove is provided on the inner wall of the front port of the outer sleeve, and a convex ring is fixed to the rear section of the outer ring of the quartz tube and is inserted into the annular groove.

[0013] In the above-mentioned technical solution of the expandable vitreous cavity lens loss blocking device for cataract surgery, preferably: a connecting end is fixedly connected to the rear end face of the barrier net retractable nozzle, the front end port of the quartz tube is fixedly connected to the rear end face of the connecting end, and the quartz tube and the barrier net retractable nozzle are coaxially arranged.

[0014] In the above-mentioned technical solution of the expandable vitreous cavity lens loss barrier device for cataract surgery, preferably: the front port edge and the rear port edge of the retractable opening are both chamfered with arcs to allow the medical-grade polycarbonate elliptical outer ring and the medical-grade polycarbonate elliptical inner ring to expand or contract more smoothly, and to avoid scratching the eyeball by the sharp corners of the port of the retractable opening.

[0015] In the above-mentioned technical solution of the expandable vitreous cavity lens loss blocking device for cataract surgery, preferably: the outer ring of the transmission rod is fixedly connected to a connecting plate in contact with the side wall of the inner cavity of the quartz tube, the front end port of the transmission rod is connected to a fixed column, and the front end of the fixed column is connected to the rear end of the rotating plate.

[0016] In the above technical solution of the expandable vitreous cavity lens loss barrier device for cataract surgery, preferably: a sealing ring is fixedly connected to the front section of the outer ring of the pulling block, and the sealing ring contacts the inner cavity side wall of the quartz tube.

[0017] As can be seen from the above technical solution, the present invention provides an expandable vitreous cavity lens loss blocking device for cataract surgery. Compared with the prior art, the present invention has the following beneficial effects:

[0018] This device utilizes the spiral transmission structure of the screw tube and the outer sleeve, combined with the linkage mechanism of the transmission rod and the pulling block, to achieve the control of the lens barrier net by the medical steel wire, so that the medical-grade polycarbonate elliptical outer ring and the elliptical inner ring can be expanded or retracted as needed, forming a stable supporting concave surface during surgery to prevent the lens from falling off. In addition, the numerical markings on the observation port provide doctors with an intuitive reference for the screwing depth, and combined with the sealing ring's tight sealing of the intraocular fluid, the risk of postoperative infection is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces and describes the drawings required for use in the embodiments of the present invention or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the expandable lens loss prevention device;

[0021] Figure 2 Schematic diagram of the structure of the lens barrier net;

[0022] Figure 3 It is a cross-sectional schematic diagram of the barrier net injection mechanism;

[0023] Figure 4 A schematic diagram of a push rod inside the barrier net push injection mechanism;

[0024] Figure 5 It is a structural diagram of the retractable mouth of the barrier net.

[0025] Attachment Figure 1 -Attached Figure 5 The corresponding relationship between the components is as follows:

[0026] 1. Barrier mesh injection mechanism; 11. Outer sleeve; 12. Screw tube; 13. Spiral pattern; 14. Screw end; 15. Observation port; 16. Pulling block; 17. Barrier mesh retractable nozzle; 18. Quartz tube; 19. Transmission rod; 110. Connecting piece; 111. Cavity; 112. Sealing ring; 113. Rotating piece; 114. Fixed column; 115. Connecting end; 116. Retractable nozzle; 2. Lens barrier mesh; 21. Medical steel wire; 22. Medical-grade polycarbonate elliptical outer ring; 23. Medical-grade polycarbonate elliptical inner ring. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In order to more clearly explain and illustrate the technical solution and implementation of the present invention, preferred specific embodiments for implementing the technical solution of the present invention are introduced below.

[0029] When implementing the expandable vitreous cavity lens loss barrier device, the barrier net injection mechanism 1 serves as the core component, and its front end is connected to the lens barrier net 2. The overall design is intended to achieve precise expansion and retraction of the lens barrier net through a mechanical structure. The barrier net injection mechanism 1 is composed of an outer sleeve 11, a screw tube 12, and a quartz tube 18 to form a main frame. The screw tube 12 is rotatably arranged in the outer sleeve 11 through its rear port. The spiral pattern 13 on its outer ring surface is coupled with a slider fixed in the rear port of the outer sleeve 11 to form a spiral transmission structure. The front end of the screw tube 12 is rotatably connected to the pulling block 16 through a transmission rod 19. The front end of the transmission rod 19 is fixed with a rotating piece 113 that is inserted into the rear cavity 111 of the pulling block 16, so that the rotation action can be effectively transmitted to the pulling block 16.

[0030] The outer surface of the screwing tube 12 is engraved with a length value, and the observation port 15 on the rear side wall of the outer sleeve 11 allows the doctor to observe the screwing depth in real time, thereby controlling the expansion degree of the barrier net. The screwing end 14 at the rear end of the screwing tube 12 is equipped with an anti-slip groove to improve operational convenience. The annular groove on the inner wall of the front end of the outer sleeve 11 engages with the convex ring on the rear end of the outer ring of the quartz tube 18 to ensure the stable installation of the quartz tube 18. The barrier net receiving and releasing nozzle 17 connected to the front end of the quartz tube 18 is fixed to the quartz tube 18 via the connecting end 115, and the edge of the receiving and releasing nozzle 116 is chamfered to reduce friction and make the expansion or contraction of the barrier net smoother. The outer ring of the transmission rod 19 is fixed with a connecting piece 110 that contacts the inner wall of the quartz tube 18 to enhance structural stability. The fixed column 114 at the front end of the transmission rod 19 is connected to the rotating piece 113 to ensure the accurate transmission of the rotation movement. The sealing ring 112 at the front section of the outer ring of the pulling block 16 is in close contact with the side wall of the inner cavity of the quartz tube 18 to prevent liquid leakage during the operation and ensure the sterility of the operating environment.

[0031] The lens barrier mesh 2 consists of medical steel wires 21, a medical-grade polycarbonate elliptical outer ring 22, and 30-36 intersecting medical-grade polycarbonate elliptical inner rings 23. The medical steel wires 21 connect the pull block 16 to the medical-grade polycarbonate elliptical outer ring 22. The outer end of the elliptical inner ring 23 is fixed to the inner surface of the elliptical outer ring 22, and the inner end is recessed downward to form a concave surface that supports the lens. When the screw tube 12 rotates, the spiral pattern 13 cooperates with the slider, and the transmission rod 19 pushes the pull block 16 back and forth, thereby stretching or loosening the medical steel wires 21. The intersecting area of ​​the elliptical inner rings 23 forms a diamond-shaped space that can deform outward or inward, allowing the barrier mesh to expand and contract. Due to its memory property, the medical-grade polycarbonate material can maintain the concave state that supports the lens after expansion, ensuring stability during surgery.

[0032] Example 1: During device assembly, the screw tube 12 is connected to the outer cannula 11 via the screw end 14 at its rear end. The anti-slip groove design provides the surgeon with a stable feel during rotation. The spiral pattern 13 of the screw tube 12 engages with a slider inside the outer cannula 11. When the surgeon rotates the screw end 14, the spiral transmission mechanism drives the drive rod 19 forward, pushing the pull block 16 along the axis of the quartz tube 18. The movement of the pull block 16 stretches the lens barrier mesh 2 via the medical steel wire 21, causing the medical-grade polycarbonate elliptical inner ring 23 to gradually expand from its collapsed state, forming multiple diamond-shaped spaces. The inner end of the elliptical inner ring 23 is recessed downward to form a supporting concave surface, preventing it from falling out during surgery. After the procedure, the screw end 14 is rotated in the opposite direction, retracting the drive rod 19 and the pull block 16, which then unwinds the medical steel wire 21. The elliptical inner ring 23, thanks to its memory function, returns to its collapsed state, facilitating device removal from the eye. During the entire process, the numerical markings on the observation port 15 help the doctor control the screwing depth so that the barrier net is expanded to a degree that meets the surgical requirements, while the sealing ring 112 effectively prevents leakage of intraocular fluid and ensures a sterile surgical environment.

[0033] Example 2: The device is used to treat a subluxated lens. Preoperatively, the surgeon inspects the initial state of the lens barrier mesh 2 through the retraction opening 116 of the barrier mesh retraction nozzle 17, confirming that the elliptical inner ring 23 is tightly closed and free of deformation. At the start of surgery, the surgeon slowly rotates the screwing tip 14. The spiral pattern 13 of the screwing tube 12 drives the transmission rod 19 forward, and the pulling block 16 gradually deploys the barrier mesh via the medical steel wire 21. The intersecting design of the elliptical inner ring 23 creates multiple deformable diamond-shaped spaces during deployment, providing stable support even in the event of a partially dislocated lens. The memory properties of the medical-grade polycarbonate material ensure that the barrier mesh maintains a concave position after deployment, preventing secondary lens displacement caused by external forces during surgery. During surgery, the surgeon adjusts the screwing depth in real time through the observation port 15, dynamically optimizing the barrier mesh position based on the support feedback from the elliptical inner ring 23. At the end of the operation, the screw end 14 is rotated in the reverse direction, the barrier net is quickly retracted, and the sealing ring 112 is tightly fitted with the inner cavity of the quartz tube 18 to prevent the vitreous body from overflowing.

[0034] Example 3: The device was adaptively adjusted for cataract surgery on patients with special eye types. Preoperative examination revealed a short axial length of the patient's eyeball and an anterior lens position. The surgeon shortened the effective travel of the drive rod 19 and controlled the deployment range of the barrier mesh using the position-limiting design of the screw end 14. During surgery, as the surgeon rotated the screw end 14, the drive rod 19 pushed the pull block 16 forward, gradually stretching the barrier mesh with the medical wire 21, allowing the elliptical inner ring 23 to precisely deploy within the confined space. The circular chamfered design of the retraction opening 116 ensured smooth and unobstructed expansion of the barrier mesh, preventing additional damage to intraocular tissue. The concave design of the elliptical inner ring 23 provided stable support even in confined spaces. During surgery, the surgeon confirmed the extent of the barrier mesh deployment through the observation port 15 and fine-tuned the screwing depth based on the patient's eye conditions. After surgery, the device collapsed smoothly, and the sealing ring 112 effectively isolated intraocular fluid.

[0035] Example 4: To address the issue of device accessory replacement and reduce medical costs, based on the structure of Example 1, a thin rubidium magnet sheet is attached to the front end of the pulling block 16, and a thin rubidium magnet sheet is also fixed to the rear end of the medical steel wire 21. The two thin rubidium magnet sheets are mutually adsorbed and connected. If the medical-grade polycarbonate elliptical outer ring 22 and elliptical inner ring 23 experience poor deployment, blockage, or incomplete extension, the medical steel wire 21 can be removed with tweezers and replaced with a new barrier net, thereby reducing costs.

[0036] Based on the above-described preferred technical solution, the workflow of this solution is described below: Preoperatively, an incision is made in the patient's eye, and the device is implanted in the sclera 3.5 mm from the limbus. The doctor connects the screw tube 12 to the outer cannula 11 via the screwing end 14 and checks the fit between the spiral grooves 13 and the slider. The doctor confirms that the rotational connection between the drive rod 19 and the pull block 16 is smooth, and that the quartz tube 18 and the barrier mesh retraction nozzle 17 are securely fixed. The doctor also checks that the arc chamfer of the retraction nozzle 116 is smooth and unobstructed. During the operation, the doctor rotates the screwing end 14, driving the drive rod 19 forward via the spiral grooves 13, pushing the pull block 16 along the axis of the quartz tube 18. This stretches the medical steel wire 21, causing the medical-grade polycarbonate elliptical inner ring 23 to gradually expand from its collapsed state. Its inner concave surface precisely fits under the lens, supporting and preventing it from falling off. The doctor can adjust the screwing depth in real time through the observation port 15 to control the degree of barrier mesh deployment. After the operation, ultrasonic nucleus fragmentation and suction removal, the doctor rotates the screw end 14 in the opposite direction, the transmission rod 19 retracts and drives the pulling block 16 to move backward, the medical wire 21 is relaxed, and the elliptical inner ring 23 returns to the retracted state by virtue of its memory. The sealing ring 112 can prevent leakage of intraocular fluid when the device is removed.

[0037] Example Five: The present invention further optimizes the structural design of the expandable vitreous cavity lens shedding barrier device. On the basis of ensuring the original function, it significantly improves the surgical safety, operational convenience and clinical applicability. In terms of operational control, the threaded fit between the screw tube 12 and the outer sleeve 11 has been precisely improved, and the rotational resistance is smaller, so that the doctor can more easily control the expansion and retraction of the barrier net. The numerical markings on the outer ring of the screw tube 12 adopt a clearer scale design, and combined with the observation port 15, the doctor can intuitively judge the expansion degree of the barrier net 2 to avoid insufficient or excessive adjustment. The connection between the transmission rod 19 and the pulling block 16 is lubricated, so that the rotational force is transmitted smoothly without jamming, making the entire operating system smoother and more reliable.

[0038] In terms of lens support stability, the cross-connection of the medical-grade polycarbonate elliptical inner ring 23 is optimized, and the deformation capacity of the diamond-shaped space is further enhanced, so that the barrier net 2 can more naturally fit the shape of the lens when deployed. The memory performance of the medical-grade polycarbonate material is also improved, ensuring that the medical-grade polycarbonate elliptical outer ring 22 and elliptical inner ring 23 can maintain a stable concave state for a long time after deployment, avoiding deformation caused by external interference during surgery. It is particularly worth noting that:

[0039] The oval design of the barrier mesh 2 in this invention is a key design choice that has been thoroughly researched and clinically validated. Compared to the traditional circular design, the oval structure has significant advantages in the following aspects:

[0040] The elliptical structure is highly consistent with the natural anatomy of the posterior chamber of the eyeball. The anteroposterior diameter of the human vitreous cavity (approximately 16-17 mm) is typically smaller than the horizontal diameter (approximately 20-21 mm). The elliptical shape, with its long axis extending horizontally and its short axis oriented anteriorly, better adapts to the intraocular space. A circular design, on the other hand, either fails to fully utilize the horizontal space (the diameter is limited by the anterior-posterior diameter) or causes excessive compression in the anterior-posterior direction.

[0041] The curvature of the elliptical structure provides a greater support span along its long axis. The medical-grade polycarbonate elliptical outer ring 22 can extend its long axis to 18-20mm, effectively covering the area at risk of lens loss, while maintaining a short axis of approximately 16mm to avoid compressing the ciliary body. In comparison, a circular design would require a larger diameter to achieve the same coverage area, which could easily cause damage to surrounding tissues.

[0042] The cross-diamond structure of the oval medical-grade polycarbonate inner ring 23 produces a more uniform stress distribution during deployment. Deformation along the major axis primarily provides support, while deformation along the minor axis maintains structural stability. This anisotropic deformation allows the barrier mesh 2 to better adapt to the dynamic movement of the lens during surgery. Circular structures, due to their isotropic nature, are prone to overall collapse under localized pressure.

[0043] When the elliptical barrier net 2 is pulled by the medical steel wire 21, the expansion speed in the short axis direction can be controlled independently of the long axis. The doctor can accurately control the shape of the supporting surface by adjusting the rotation angle of the screw tube 12, and control the retraction or extension speed of the steel wire 21, thereby achieving the expansion speed in the short axis direction of the elliptical barrier net 2. However, when the circular structure is expanded, all directions change synchronously, and it is difficult to achieve such precise control.

[0044] To enhance surgical safety, the opening 116 of the barrier mesh retractor 17 features smoother chamfers, ensuring the barrier mesh 2 does not rub or scratch intraocular tissue during insertion and removal. The sealing ring 112 has been upgraded to a softer, medical-grade silicone material, providing a tighter fit against the inner wall of the quartz tube 18, effectively preventing intraocular fluid leakage and significantly reducing the risk of postoperative infection. The anti-slip groove of the screwing end 14 has been deepened to prevent accidental rotation due to slippery hands, further enhancing surgical stability.

[0045] The clinical applicability of this device has also been significantly improved. By adjusting the stroke of the transmission rod 19, it can adapt to special eye structures such as short eye axes and deep anterior chambers, so that the barrier net 2 can work stably in the eyes of different patients. The medical steel wire 21 and the traction block 16 are connected by magnetic attraction, so that the barrier net 2 can be quickly replaced when it is deformed or damaged, greatly reducing the risk of interruption during surgery, and allowing the entire device except the barrier net 2 to be reused, which is more environmentally friendly.

[0046] Taken together, these optimized designs have comprehensively improved the device in terms of operational accuracy, support stability, surgical safety, and clinical applicability. Doctors can control the barrier net 2 more easily and precisely during surgery, and patients can receive safer and more effective surgical protection.

[0047] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone should be aware that any structural changes made under the guidance of the present invention, and any technical solutions that are the same or similar to those of the present invention, fall within the scope of protection of the present invention. Finally, it should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no technical significance. Any structural modification, change in proportional relationship or adjustment of size, without affecting the efficacy and purpose that can be achieved by this application, should still fall within the scope of the technical content disclosed in this application.

Claims

1. An expandable vitreous cavity lens loss barrier device for cataract surgery, comprising a barrier net push injection mechanism (1), characterized in that: The front end of the barrier net injection mechanism (1) is connected to a lens barrier net (2); The barrier net injection mechanism (1) includes an outer sleeve (11), a screw tube (12) rotatably arranged in the rear port of the outer sleeve (11), and a quartz tube (18) fixedly connected to the front port of the outer sleeve (11); a spiral pattern (13) is provided on the outer ring surface of the screw tube (12); a slider coupled to the inside of the spiral pattern (13) is fixed in the rear port of the outer sleeve (11); a front end of the screw tube (12) is fixedly connected to a transmission rod (19); and a front end of the transmission rod (19) is rotatably connected to a pulling block (16); The front end of the quartz tube (18) is fixedly connected to a barrier net receiving and releasing nozzle (17), and the front end surface of the barrier net receiving and releasing nozzle (17) is provided with a receiving and releasing opening (116) for the lens barrier net (2) to enter and exit; the front end of the transmission rod (19) is fixedly connected to a rotating piece (113) inserted into the rear interior of the pulling block (16), and the rear interior of the pulling block (16) is provided with a cavity (111) for the rotating piece (113) to be inserted and rotated; The lens barrier net (2) includes a medical steel wire (21) connected to the front end of the pulling block (16), a medical-grade polycarbonate elliptical outer ring (22) fixedly connected to the front end of the medical steel wire (21), and 30-36 medical-grade polycarbonate elliptical inner rings (23) are fixed in a circular array inside the medical-grade polycarbonate elliptical outer ring (22), and the medical-grade polycarbonate elliptical inner rings (23) are arranged to cross each other, wherein the area where the medical-grade polycarbonate elliptical inner rings (23) cross each other forms a rhombus-shaped space that can be deformed outward or inward.

2. The expandable vitreous cavity lens loss blocking device for cataract surgery according to claim 1, characterized in that: The medical-grade polycarbonate elliptical outer ring (22) and the medical-grade polycarbonate elliptical inner ring (23) are located below the lens, the outer ends of the medical-grade polycarbonate elliptical inner ring (23) are fixedly connected to the inner surface of the medical-grade polycarbonate elliptical outer ring (22), and the inner end of the medical-grade polycarbonate elliptical inner ring (23) is concave downward to form a concave surface for supporting the lens.

3. The expandable vitreous cavity lens loss blocking device for cataract surgery according to claim 1, characterized in that: The medical-grade polycarbonate elliptical inner ring (23) is elliptical, and the medical-grade polycarbonate elliptical inner ring (23) and the medical-grade polycarbonate elliptical outer ring (22) are both memory-capable and are used to maintain a concave state of the supporting lens after expansion.

4. The expandable vitreous cavity lens loss blocking device for cataract surgery according to claim 1, characterized in that: The outer surface of the screw tube (12) is spirally engraved with a length value, and the rear side wall of the outer sleeve (11) is provided with an observation port (15) for observing the value.

5. The expandable vitreous cavity lens loss blocking device for cataract surgery according to claim 1, characterized in that: The end of the screwing tube (12) located at the rear side of the outer sleeve (11) is fixedly connected to a screwing end (14), and a plurality of anti-slip grooves are provided on the outer surface of the screwing end (14).

6. The expandable vitreous cavity lens loss blocking device for cataract surgery according to claim 1, characterized in that: An annular groove is provided on the inner wall of the front port of the outer sleeve (11), and a convex ring is fixed to the rear section of the outer ring of the quartz tube (18) and is inserted into the annular groove.

7. The expandable vitreous cavity lens loss blocking device for cataract surgery according to claim 1, characterized in that: A connecting end (115) is fixedly connected to the rear end face of the barrier net receiving and releasing nozzle (17), a front end port of the quartz tube (18) is fixedly connected to the rear end face of the connecting end (115), and the quartz tube (18) and the barrier net receiving and releasing nozzle (17) are coaxially arranged.

8. The expandable vitreous cavity lens loss blocking device for cataract surgery according to claim 1, characterized in that: The front port edge and the rear port edge of the retractable opening (116) are both chamfered to allow the medical-grade polycarbonate elliptical outer ring (22) and the medical-grade polycarbonate elliptical inner ring (23) to expand or contract more smoothly, and to prevent the sharp corners of the port of the retractable opening (116) from scratching the eyeball.

9. The expandable vitreous cavity lens loss blocking device for cataract surgery according to claim 1, characterized in that: The outer ring of the transmission rod (19) is fixedly connected to a connecting piece (110) in contact with the inner cavity side wall of the quartz tube (18); the front end of the transmission rod (19) is connected to a fixing column (114); the front end of the fixing column (114) is connected to the rear end of the rotating piece (113).

10. The expandable vitreous cavity lens loss blocking device for cataract surgery according to claim 1, characterized in that: A sealing ring (112) is fixedly connected to the front section of the outer ring of the pulling block (16), and the sealing ring (112) is in contact with the side wall of the inner cavity of the quartz tube (18).

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