A device capable of forming an opening in the trabecular meshwork of an eye

Abstract

The utility model discloses a device capable of forming an opening in the trabecular meshwork of the eye, comprising a handle, a cutting element, a sheath tube and a pushing element, the cutting element comprises an elongated rod and two cutting blades, the tail of the elongated rod is fixedly connected with the head of the handle, and the head of the elongated rod is connected with the two cutting blades; the two cutting blades are symmetrically arranged with a predetermined opening, and the head of each cutting blade has a cutting part capable of penetrating into the trabecular meshwork and cutting the trabecular meshwork; the sheath tube is sleeved on the elongated rod and can slide along the elongated rod; the pushing element is connected with the handle and can drive the sheath tube to move towards the direction of the two cutting blades, so that the two cutting blades are closed to each other under the extrusion of the sheath tube to cut the trabecular meshwork, the cut tissue is easy to be peeled off from the trabecular meshwork, the cut part of the trabecular meshwork can form a trabecular meshwork opening, and the aqueous humor in the anterior chamber is promoted to flow out of the trabecular meshwork opening to reduce the intraocular pressure; and the size of the trabecular meshwork opening can be controlled during the cutting process.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically to a device capable of forming an opening in the trabecular meshwork of the eye. Background Technology

[0002] Glaucoma is the leading cause of irreversible blindness worldwide. Current surgical treatments for glaucoma include various methods such as laser therapy, trabeculectomy, implantation of various drainage devices, and MIGS (Mixed Intraocular Gland Scale). The trabecular meshwork is a loosely structured network of thin, overlapping connective tissues that forms the inner wall of Schlemm's canals. In healthy individuals, aqueous humor from the anterior chamber of the eye passes through the trabecular meshwork, enters Schlemm's canals, and then flows into the bloodstream via collecting ducts. Existing technologies have disclosed methods to promote the outflow of aqueous humor from the anterior chamber and reduce intraocular pressure by creating openings in the trabecular meshwork, inserting drainage devices into the trabecular meshwork, or creating pores through laser ablation. Directly creating openings in the trabecular meshwork is one of the more ideal treatment methods. Existing technologies also disclose surgical scalpels for directly creating openings in the trabecular meshwork. However, existing trabecular meshwork opening scalpels have limitations in controlling the incision size during operation, and it is difficult to simultaneously sever and detach the excised portion from the trabecular meshwork. Utility Model Content

[0003] To address the aforementioned technical problems, this application provides a device for forming an opening in the trabecular meshwork of the eye, comprising: a handle; a cutting element including an elongated rod and two cutting blades, the tail of the elongated rod being fixedly connected to the head of the handle, and the head of the elongated rod being connected to the two cutting blades; the two cutting blades being symmetrically arranged with a predetermined opening, and each cutting blade having a cutting portion at its head capable of penetrating and cutting the trabecular meshwork; a sheath sleeved on the elongated rod and slidable along the elongated rod; and a pusher connected to the handle, capable of driving the sheath to move toward the two cutting blades, such that the two cutting blades close together under the compression of the sheath to cut the trabecular meshwork.

[0004] In some embodiments of this application, the cutting blade further includes a cutting edge portion and a compression portion, wherein the cutting edge portion is disposed between the cutting edge portion and the compression portion, and the compression portion is connected to the head of the slender rod.

[0005] In some embodiments of this application, when the two cutting blades are closed, the inner sides of the two opposing blade portions come into contact; each blade portion also has two side blades on its inner side, the two side blades being located at the two edges of the blade portion in its thickness direction and extending along the length direction of the blade portion.

[0006] In some embodiments of this application, the inner side of the blade portion also has a storage groove, which is located between the two side blades and extends along the length direction of the blade portion; the two opposing storage grooves can be enclosed to form a storage cavity, which is used to store the cut trabecular mesh structure.

[0007] In some embodiments of this application, the free end of each cut portion has at least one tip.

[0008] In some embodiments of this application, when the two cutting blades are closed, at least one tip of one of the cutting portions intersects with at least one tip of the other cutting portion, so that the free ends of the two cutting portions can be completely closed, which is suitable for cutting a beam mesh opening on the beam mesh.

[0009] In some embodiments of this application, the free end of one of the cutting portions is a first serration, and the free end of the other cutting portion is a second serration. Both the first serration and the second serration have at least two tips, and the second serration and the first serration can engage together.

[0010] In some embodiments of this application, when the two cutting blades are closed, at least one tip of one of the cutting portions is aligned with at least one tip of the other cutting portion, so that the free ends of the two cutting portions are not completely closed, which is suitable for cutting a beam mesh opening on the beam mesh.

[0011] In some embodiments of this application, the pusher includes: a movable part adjacent to the head of the handle and coaxial with the handle, the movable part being fixedly connected to the tail of the sheath; a driving part connecting the movable part and the handle, capable of driving the movable part to move the sheath synchronously; the driving part is cage-shaped and includes a plurality of elastic pressing parts arranged around the handle as an axis, the elastic pressing parts being arch-shaped and capable of elastic deformation.

[0012] In some embodiments of this application, the angle of the predetermined opening is 5° to 150°; and / or, the length of the cutting portion is 0.2 to 1.5 mm; and / or, the length of the blade portion is 0.5 to 4.0 mm; and / or, the length of the compression portion is 0.3 to 2 mm.

[0013] The beneficial effects of this application are as follows: This utility model discloses a device for forming an opening in the trabecular meshwork of the eye, including a handle, a cutting element, a sheath, and a pusher. The cutting element includes a slender rod and two cutting blades. The tail of the slender rod is fixedly connected to the head of the handle, and the head of the slender rod is connected to the two cutting blades. The two cutting blades are symmetrically arranged with a predetermined opening, and the head of each cutting blade has a cutting portion that can penetrate the trabecular meshwork and cut it. The sheath is sleeved on the slender rod and can slide along the slender rod. The pusher is connected to the handle and can drive the sheath to move in the direction of the two cutting blades, so that the two cutting blades close together under the pressure of the sheath to cut the trabecular meshwork. This makes it easy to peel the cut tissue from the trabecular meshwork, and an opening in the trabecular meshwork can be formed at the cut site, promoting the outflow of aqueous humor from the anterior chamber through the opening to reduce intraocular pressure. Furthermore, the size of the opening in the trabecular meshwork is controllable during the cutting process. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0015] Figure 1A This is a perspective view of an embodiment of the device of the present invention that can be used to form an opening in the trabecular meshwork of the eye;

[0016] Figure 1B This is an exploded view of an embodiment of the device of the present invention that can be used to form an opening in the trabecular meshwork of the eye;

[0017] Figure 1C This is a cross-sectional view of an embodiment of the device of the present invention that can be used to form an opening in the trabecular meshwork of the eye;

[0018] Figure 1D yes Figure 1A A magnified view of a portion of region A in the middle;

[0019] Figure 1E This is a schematic diagram of the cutting blade in the open state of one embodiment of the device of this utility model that can be used to form an opening in the trabecular meshwork of the eye.

[0020] Figure 1F This is a schematic diagram of the cutting blade in the closed state in one embodiment of the device of this utility model that can be used to form an opening in the trabecular meshwork of the eye.

[0021] Figure 1G This is a schematic diagram of the cutting blade cutting the trabecular mesh in one embodiment of the device of this utility model that can be used to form an opening in the trabecular mesh of the eye;

[0022] Figure 1H This is a schematic diagram of the cutting tissue falling into the storage cavity in one embodiment of the device of this utility model that can be used to form an opening in the trabecular meshwork of the eye.

[0023] Figure 1I This is a schematic diagram illustrating the usage process of an embodiment of the device of this utility model that can be used to form an opening in the trabecular meshwork of the eye;

[0024] Figure 2A This is a schematic diagram of the cutting blade in the open state in another embodiment of the device of this utility model that can be used to form an opening in the trabecular meshwork of the eye.

[0025] Figure 2B This is a schematic diagram of the closed state in another embodiment of the device of this utility model that can be used to form an opening in the trabecular meshwork of the eye;

[0026] Figure 2C This is a schematic diagram illustrating the usage process of another embodiment of the device of this utility model that can be used to form an opening in the trabecular meshwork of the eye;

[0027] Figure 3A This is a schematic diagram of the structure of two cutting blades in another embodiment of the device of this utility model that can be used to form an opening in the trabecular meshwork of the eye;

[0028] Figure 3B This is a schematic diagram of the structure of two cutting blades in another embodiment of the device of this invention that can be used to form an opening in the trabecular meshwork of the eye.

[0029] The reference numerals in the attached figures are as follows: 300, eyeball; 200, trabecular meshwork; 210, tissue to be cut; 220, trabecular meshwork opening; 100, device for forming an opening in the trabecular meshwork of the eye; 10, handle; 20, cutting element; 21, slender rod; 22, cutting edge; 221, cutting part; 2211, tip; 222, blade part; 2221, storage groove; 2222, side blade; 223, compression part; 30, sheath; 40, pusher; 41, moving part; 42, driving part; 421, elastic pressing part; α, predetermined opening. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other alternative implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] like Figures 1A to 1IAs shown, in one embodiment of a device 100 for forming an opening in the trabecular meshwork of the eye, the device 100 includes a handle 10, a cutting element 20, a sheath 30, and a pusher 40. The cutting element 20 includes an elongated rod 21 and two cutting blades 22. The tail of the elongated rod 21 is fixedly connected to the head of the handle 10, and the head of the elongated rod 21 is connected to the two cutting blades 22. The two cutting blades 22 are scissor-shaped and can open or close, and the two cutting blades 22 are symmetrically arranged with a predetermined opening α. Figure 1D As shown, each cutting blade 22 has a cutting part 221 at its head that can penetrate the trabecular mesh 200 and cut the trabecular mesh 200; the sheath tube 30 is sleeved on the slender rod 21 and can slide along the slender rod 21; the pusher 40 connects the handle 10 and the sheath tube 30 and can drive the sheath tube 30 to move in the direction of the two cutting blades 22, so that the two cutting blades 22 close together under the compression of the sheath tube 30 to cut the trabecular mesh 200.

[0032] Combination Figure 1G and Figure 1H In this embodiment, the cutting element 20 and sheath 30 of the device 100, which is used to form an opening in the trabecular meshwork of the eye, can enter the anterior chamber through the corneal incision on the eyeball 300. When the two cutting blades 22 reach the trabecular meshwork 200, the sheath 30 is moved toward the cutting blades 22 by the pusher 40. Under the pressure of the sheath 30, the two opposing cutting parts 221 close. During the closing process, the two sides of the trabecular meshwork 200 are cut, so that the cut tissue 210 can be easily peeled off from the trabecular meshwork 200. A trabecular meshwork opening 220 can be formed at the cut part of the trabecular meshwork 200, which promotes the outflow of aqueous humor from the anterior chamber through the trabecular meshwork opening 220 to reduce intraocular pressure.

[0033] Secondly, such as Figure 1E As shown, in this embodiment, the two cutting blades 22 are set with a predetermined opening α. The angle of the predetermined opening α is 5°~150°. The device 100 that can be used to form an opening in the trabecular meshwork of the eye is designed in various models according to different predetermined opening α sizes. The user can select the corresponding model (corresponding predetermined opening α) of the device 100 that can be used to form an opening in the trabecular meshwork of the eye according to the preset trabecular meshwork opening 220 size. In this way, the size of the trabecular meshwork opening 220 formed in the trabecular meshwork 200 is within a controllable range, so as to achieve the purpose of controllable aqueous humor drainage effect.

[0034] In this embodiment, the cutting blade 22 is laser-cut into a specific shape and then sharpened and polished; alternatively, two polished cutting blades 22 can be assembled by welding them onto a slender rod 21.

[0035] Furthermore, such as Figure 1DAs shown, in this embodiment, the cutting blade 22 further includes a blade portion 222 and a compression portion 223. The blade portion 222 is disposed between the cutting portion 221 and the compression portion 223. The compression portion 223 is connected to the head of the slender rod 21. During the closing process, the sheath tube 30 mainly squeezes the compression portion 223 to achieve the closure of the two cutting blades 22.

[0036] like Figure 1E As shown, the cutting blade 22 and its components satisfy the following limitations: the length L of the cutting blade 22 is 1~5mm; the length L1 of the cutting portion 221 is 0.2~1.5mm; the length L2 of the blade portion 222 is 0.5~4.0mm; and the length L3 of the compression portion 223 is 0.3~2mm. In a specific embodiment, the length L of the cutting blade 22 is 1mm, the length L1 of the cutting portion 221 is 0.2mm, the length L2 of the blade portion 222 is 0.5mm, and the length L3 of the compression portion 223 is 0.3mm; in another specific embodiment, the length L of the cutting blade 22 is 5mm, the length L1 of the cutting portion 221 is 1mm, the length L2 of the blade portion 222 is 3mm, and the length L3 of the compression portion 223 is 1mm.

[0037] like Figure 1E As shown, the free end of the cutting section 221 has at least one tip 2211, which may be pointed or otherwise configured to easily pierce through the beam mesh 200 for allowing the tip 2211 and other components of the cutting blade 22 to enter the Schlemm tube.

[0038] Preferably, the tip 2211 is conical in shape, with a sharp head and all sides, capable of penetrating and cutting the trabecular mesh 200. Therefore, at least two opposing tips 2211 can cut both sides of the trabecular mesh 200, making it easy to peel the cut tissue 210 from the trabecular mesh 200, and forming a trabecular mesh opening 220 at the cut point.

[0039] Combination Figures 1D to 1F In this embodiment, when the two cutting blades 22 are closed, at least one tip 2211 of one cutting part 221 is intersected with at least one tip 2211 of the other cutting part 221, so that the free ends of the two cutting parts 221 can be completely closed, which is suitable for cutting the beam mesh opening 220 on the beam mesh 200.

[0040] like Figure 3AAs shown, in some embodiments, one cutting portion 221 has a tip 2211, and the other cutting portion 221 also has a tip 2211. From the side, both tips 2211 are triangular. After the cutting portion 221 is closed, the two tips 2211 are interlaced, which can completely close the free end of the cutting portion 221.

[0041] like Figure 3B As shown, one of the cutting portions 221 has two tips 2211 with a gap between them, and the other cutting portion 221 has one tip 2211. This tip 2211 can be inserted into the gap of the previous cutting portion 221 when the cutting portion 221 is closed, so that the tips 2211 on the two cutting portions 221 are staggered after closing, and the free end of the cutting portion 221 can be completely closed.

[0042] like Figure 1D As shown, in this embodiment, the free end of one cutting portion 221 is a first serration, and the free end of the other cutting portion 221 is a second serration. Both the first and second serrations have at least two tips 2211, and the second serration can interlock with the first serration. It should be noted that, depending on the required size of the beam mesh opening 220, the number of tips 2211 on the first and second serrations can be multiple, and is not limited to two or three.

[0043] Specifically, such as Figure 1D As shown, in this embodiment, one cutting part 221 has three tips 2211 and the other cutting part 221 has two tips 2211. There is a gap between each pair of adjacent tips 2211, so that the tips 2211 are staggered after the cutting blade 22 is closed, thus achieving complete closure of the free end of the cutting part 221.

[0044] It should be noted that, as Figure 1F and Figure 1G As shown, since the free ends of the two cutting portions 221 can be completely closed together, the tissue 210 to be cut will be completely peeled off from the trabecular mesh 200 during the closing process, and other parts of the trabecular mesh 200 (i.e., non-cut parts) will not be pulled out, thus preventing secondary injury to the patient. In addition, the device 100 in this embodiment, which is used to form an opening in the trabecular mesh of the eye, is suitable for cutting out a smaller trabecular mesh opening 220.

[0045] like Figure 1D As shown, after the two cutting blades 22 are closed, the inner sides of the two opposing blade portions 222 come into contact; each blade portion 222 also has two side blades 2222 on its inner side, the two side blades 2222 are located at the two edges of the blade portion 222 in its thickness direction and extend along the length direction of the blade portion 222.

[0046] Preferably, the distance between the two side blades 2222 is 0.2~0.5mm, consistent with the height of the trabecular meshwork 200 in the human eye; in some specific embodiments, the distance between the two side blades 2222 is 0.2mm, 0.3mm, 0.4mm, or 0.5mm. In this embodiment, the side blades 2222 are sharp and can also cut the trabecular meshwork 200, but the device mainly relies on the tip 2211 on the cutting part 221 for cutting.

[0047] Furthermore, in order to allow the cut tissue 210 to exit the eyeball 300 following the device 100 that can be used to form an opening in the trabecular meshwork of the eye, and to prevent it from being left inside the eyeball 300; such as Figure 1D As shown, in this embodiment, the inner side of the blade portion 222 also has a storage groove 2221. The storage groove 2221 is located between the two side blades 2222 and extends along the length direction of the blade portion 222. The two opposing storage grooves 2221 can enclose to form a storage cavity. The storage cavity is used to store the cut trabecular mesh 200 tissue, so that when the cutting portion 221 leaves the eyeball 300, the cut tissue 210 can be taken away together and will not be left in the eyeball 300.

[0048] Combination Figure 1G and Figure 1H , Figure 1G This is a schematic diagram of two cutting sections 221 cutting both sides of the trabecular mesh 200. During the closing process, the tips 2211 of the two cutting sections 221 cut along the arc-shaped cutting trajectory X1. After the cutting is completed, the cut tissue 210 is peeled off from the trabecular mesh 200 and stored in the storage cavity formed by the two storage grooves 2221. It can leave the eyeball 300 with the device 100. The cut tissue 210 is crescent-shaped when viewed from the top view. After the cut tissue 210 is peeled off, a trabecular mesh opening 220 is formed on the trabecular mesh 200. Aqueous humor in the anterior chamber flows out through the trabecular mesh opening 220 to reduce intraocular pressure.

[0049] Furthermore, such as Figure 1B and Figure 1CAs shown, the pusher 40 includes a moving part 41 and a driving part 42. The moving part 41 is cylindrical, adjacent to the head of the handle 10, and coaxial with the handle 10. The moving part 41 is also fixedly connected to the tail of the sheath 30. The driving part 42 connects the moving part 41 and the handle 10 and can drive the moving part 41 to move the sheath 30 synchronously. Specifically, the drive unit 42 is cage-shaped and includes multiple elastic pressing parts 421 arranged around the handle 10 as the axis. The elastic pressing parts 421 are arch-shaped and can undergo elastic deformation. When the elastic pressing parts 421 are not pressed, the moving part 41 does not move and the two cutting blades 22 are open. When the elastic pressing parts 421 are pressed, the elastic deformation drives the moving part 41 and the sheath 30 to move towards the cutting blades 22. After the sheath 30 squeezes the two cutting blades 22, the two cutting blades 22 close. When the pressed elastic pressing parts 421 are released, the elastic pressing parts 421 return to their original state.

[0050] In this embodiment, the pusher 40 and the handle 10 can be formed from a slender rod; the handle 10 is stepped, with a circular cross-section, and its head diameter is smaller than its tail diameter. Furthermore, the diameter of the moving part 41 in the pusher 40 is the same as the diameter of the tail of the handle 10.

[0051] Furthermore, in some other embodiments, the drive unit 42 may also be a telescopic push rod disposed between the moving part 41 and the handle 10, or other mechanisms capable of driving the moving part 41 to move.

[0052] Furthermore, in this embodiment, the device 100, which can be used to form an opening in the trabecular meshwork of the eye, is made of medical-grade stainless steel or titanium alloy.

[0053] Combination Figures 1G to 1I The process of cutting the trabecular mesh opening 220 on the trabecular mesh 200 using the device 100 shown in this embodiment, which is capable of forming an opening in the trabecular mesh of the eye, is as follows:

[0054] Step 1: Make a corneal incision 300mm from the cornea of ​​the eyeball;

[0055] Step 2: The head of the device 100, which is used to create an opening in the trabecular meshwork of the eye, passes through the corneal incision and enters the anterior chamber; when the two cutting blades 22 reach the trabecular meshwork 200, the elastic pressing part 421 is pressed to move the sheath 30 toward the cutting blades 22, and the two opposing cutting parts 221 close to complete the cutting.

[0056] Step 3: Continue pressing the elastic pressing part 421 until the device 100, which is used to form an opening in the trabecular meshwork of the eye, is removed from the eyeball 300.

[0057] Furthermore, such as Figures 2A to 2CAs shown, this embodiment is another embodiment of the device 100 capable of forming an opening in the trabecular meshwork of the eye, and is similar to the one described above. Figures 1A to 1I The difference in the illustrated embodiment is that the free ends of both cutting portions 221 each have a protruding tip 2211, which is tapered in shape. When the two cutting blades 22 are closed, at least one tip 2211 of one cutting portion 221 is aligned with at least one tip 2211 of the other cutting portion 221, so that the free ends of the two cutting portions 221 are not completely closed. This is suitable for cutting a beam mesh opening 220 on the beam mesh 200, the size of which is larger than that described above. Figures 1A to 1I In the embodiment shown, the cut beam mesh opening 220 is larger in size, which is suitable for cutting large cuts in the beam mesh 200.

[0058] Furthermore, when the two cutting portions 221 of this embodiment are closed, the sharp tips of the two tips 2211 are in contact and aligned, and the free ends of the two cutting portions 221 are not completely closed. Although the tissue 210 being cut is not completely cut off, the device 100 in this embodiment, which is capable of forming an opening in the trabecular meshwork of the eye, can completely peel the tissue 210 from the trabecular meshwork 200 by means of rotating the handle 10.

[0059] The surgical procedure for cutting the trabecular meshwork opening 220 in the trabecular meshwork 200 using the device 100 shown in this embodiment, which is capable of forming an opening in the trabecular meshwork of the eye, is as follows:

[0060] Step 1: Make a corneal incision 300mm from the cornea of ​​the eyeball;

[0061] Step 2: The head of the device 100, which is used to create an opening in the trabecular meshwork of the eye, passes through the corneal incision and enters the anterior chamber; when the two cutting blades 22 reach the trabecular meshwork 200, the elastic pressing part 421 is pressed to move the sheath 30 toward the cutting blades 22, and the two opposing cutting parts 221 close to complete the initial cutting.

[0062] Step 3: Using the corneal incision as a fulcrum, rotate the handle 10 to complete the removal of the remaining portion;

[0063] Step 4: Continue pressing the elastic pressing part 421 until the device 100, which is used to form an opening in the trabecular meshwork of the eye, is removed from the eyeball 300.

[0064] The other structural components and parameters of this embodiment are the same as those described above. Figures 1A to 1I The embodiments shown are the same, and will not be repeated here.

[0065] Finally, it should be noted that if any directional indication (such as up, down, left, right, front, back, etc.) is involved in the embodiments of this application, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0066] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0067] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A device capable of forming an opening in the trabecular meshwork of an eye, comprising: include: Handle (10); The cutting component (20) includes an elongated rod (21) and two cutting blades (22). The tail of the elongated rod (21) is fixedly connected to the head of the handle (10), and the head of the elongated rod (21) is connected to the two cutting blades (22). The two cutting blades (22) are symmetrically arranged with a predetermined opening α, and the head of each cutting blade (22) has a cutting part (221) that can penetrate the beam mesh (200) and cut the beam mesh (200). The sheath (30) is sleeved on the slender rod (21) and can slide along the slender rod (21); The pusher (40), connected to the handle (10), is capable of driving the sheath (30) to move in the direction of the two cutting blades (22), so that the two cutting blades (22) close together under the compression of the sheath (30) to cut the small beam mesh (200).

2. The device useful for forming an opening in the trabecular meshwork of the eye of claim 1, wherein, The cutting blade (22) further includes a cutting edge (222) and a compression part (223), wherein the cutting edge (222) is disposed between the cutting part (221) and the compression part (223), and the compression part (223) is connected to the head of the slender rod (21).

3. The device useful for forming an opening in the trabecular meshwork of the eye of claim 2, wherein, When the two cutting edges (22) are closed, the inner sides of the two opposing blade portions (222) come into contact; each blade portion (222) also has two side blades (2222) on its inner side, which are located at the two edges of the blade portion (222) in its thickness direction and extend along the length direction of the blade portion (222).

4. The apparatus capable of forming an opening in the trabecular meshwork of an eye of claim 3, wherein, The inner side of the blade portion (222) also has a storage groove (2221), which is located between the two side blades (2222) and extends along the length of the blade portion (222); the two opposing storage grooves (2221) can be enclosed to form a storage cavity, which is used to store the cut trabecular mesh structure.

5. The device useful for forming an opening in the trabecular meshwork of the eye according to any one of claims 1 to 4, wherein, Each of the cut portions (221) has at least one tip (2211) at its free end.

6. The device useful for forming an opening in the trabecular meshwork of the eye of claim 5, wherein, When the two cutting blades (22) are closed, at least one tip (2211) of one of the cutting portions (221) is interlaced with at least one tip (2211) of the other cutting portion (221), so that the free ends of the two cutting portions (221) can be completely closed, which is suitable for cutting a beam mesh opening (220) on the beam mesh (200).

7. The device capable of forming an opening in the trabecular meshwork of an eye of claim 6, wherein, One of the cutting portions (221) has a first serrated free end and the other cutting portion (221) has a second serrated free end. Both the first serrated and the second serrated have at least two tips (2211), and the second serrated can engage with the first serrated.

8. The apparatus capable of forming an opening in the trabecular meshwork of an eye of claim 5, wherein, When the two cutting blades (22) are closed, at least one tip (2211) of one of the cutting portions (221) is aligned with at least one tip (2211) of the other cutting portion (221) so that the free ends of the two cutting portions (221) are not completely closed, so as to be suitable for cutting a beam mesh opening (220) on the beam mesh (200).

9. The apparatus capable of forming an opening in the trabecular meshwork of an eye of claim 5, wherein, The pusher (40) includes: The movable part (41) is adjacent to the head of the handle (10) and coaxial with the handle (10). The movable part (41) is also fixedly connected to the tail of the sheath (30). The drive unit (42) connects the moving part (41) and the handle (10) and can drive the moving part (41) to move the sheath (30) synchronously. The drive unit (42) is cage-shaped and includes multiple elastic pressing parts (421) arranged around the handle (10) with the handle (10) as the axis. The elastic pressing parts (421) are arch-shaped and can undergo elastic deformation.

10. The device according to any one of claims 2 to 4, capable of forming an opening in the trabecular meshwork of the eye, characterized in that, The angle of the predetermined opening α is 5°~150°; And / or, the length of the cutting portion (221) is 0.2~1.5mm; And / or, the length of the cutting edge (222) is 0.5~4.0mm; And / or, the length of the compression section (223) is 0.3~2mm.

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