Receptor cornea trephine and use method

Abstract

The invention relates to the technical field of medical apparatus and instruments, in particular to a receptor cornea trephine and a using method thereof.The receptor cornea trephine comprises an upper base, a lower base, a segmentation ring, an inner ring, a finger holding part, a positioner, a rotating disc, a drilling tool and an air pressure control system; a lower base is connected to the lower portion of the upper base, a partition ring is sleeved with the lower base, and an inner ring is sleeved with the partition ring; the upper base, the lower base, the partition ring and the inner ring are mutually connected to form a trephine inner cavity; two symmetrical finger holding parts are arranged on the outer side of the upper base, when the cornea is positioned, the positioner is arranged in the inner ring, when the cornea is cut, the turntable is arranged in the inner ring, the drilling tool is arranged at the lower end of the turntable, and the gas control system is connected with the lower base through a gas hole; when the cornea is positioned and cut, the sight of a doctor cannot be blocked, the skill degree of the technique of the doctor can be ignored, the cornea cutting thickness is unified, air exhaust and air intake of the cornea trephine are achieved through the air pressure control system, the doctor does not need to assist in operating an injector beside, and labor force is liberated.

Description

Technical Field

[0001] The present invention relates to the technical field of medical instruments, and in particular to a receptor corneal trephine and a use method thereof. Background Art

[0002] The cornea is the transparent part of the outer layer of the eyeball wall, about 1 mm thick. The cornea is divided into 5 layers, from front to back: epithelial cell layer, anterior elastic layer, stroma layer, posterior elastic layer and endothelial cell layer; blinding eye diseases such as glaucoma, diabetic retinopathy and blinding keratopathy are increasing, and only corneal transplantation can restore the patient's sight, but donor cornea resources are scarce, and there are relatively few patients who can undergo corneal transplantation. Therefore, it is crucial to improve the success rate of corneal transplantation. Corneal transplantation is a surgery in which the donor cornea is cut and transplanted to the patient's diseased corneal area; the recipient corneal trephine is an ophthalmic instrument commonly used in ophthalmic surgery to make a circular incision on the patient's corneal surface; in corneal transplantation, the recipient corneal trephine is used to remove the patient's diseased cornea.

[0003] In the prior art, Chinese patent number "CN115969615", entitled "Negative pressure suction corneal pillow seat and negative pressure suction corneal trephine", discloses a device for cutting cornea, which includes an adsorption head, a finger support and a drill, wherein the adsorption head includes an inner ring and an outer ring, and the inner ring and the outer ring form an inner cavity. When positioning the corneal trephine to the center of the corneal lesion area, the patent uses a positioning column to first position the corneal lesion area at the center, holds the positioning column with one hand, and then sets the corneal trephine on the positioning column with the other hand, so that the corneal trephine slides down along the positioning column. When positioning, the patent blocks the line of sight when the hand is above the positioning column, which is very inconvenient for the doctor to operate. During the process of corneal trephine slipping, the positioning column is easily displaced, resulting in inaccurate positioning; this patent relies on the doctor's experience when cutting the cornea, but due to the different proficiency of doctors, the depth of corneal cutting may vary, and it is inconvenient to observe the cutting situation during cutting; the finger support surface of the finger support part of this patent is connected to the carrier at the center. Due to the different sizes of doctors' hands, it will cause large hands to be difficult to grasp and affect the doctor's vision; and when operating the corneal trephine, the doctor's assistant is required to operate the syringe to exhaust and intake air in the inner cavity of the trephine, which increases labor and requires tacit cooperation between the doctor and the assistant to complete the operation. Summary of the invention

[0004] The main technical problems to be solved by the present invention are: when cutting the corneal lesion area, due to the different proficiency levels of doctors, the depth of corneal cutting may vary, and it is inconvenient to observe the cutting process; when locating the center position of the corneal lesion area, the unreasonable design structure of the locator is easy to block the doctor's line of sight and cause inaccurate positioning; the unreasonable design structure of the finger support surface makes it difficult to grasp and affects the doctor's line of sight; when operating the corneal trephine, the doctor's assistant is required to operate the syringe, which increases the labor force.

[0005] The present invention provides the following technical solutions:

[0006] A recipient corneal trephine drill comprises an upper base, a lower base, a split ring, an inner ring, a finger support, a positioner, a turntable, a drill, and an air pressure control system;

[0007] The lower base is connected to the lower part of the upper base, a separator ring is sleeved inside the lower base, and an inner ring is sleeved inside the separator ring; the upper base, the lower base, the separator ring and the inner ring are connected to each other to form a trephine inner cavity, and the trephine inner cavity contacts the cornea to form a sealed trephine inner cavity;

[0008] Two symmetrical finger support parts are arranged on the outer side of the upper base, and the finger support parts include a finger support frame and a finger support surface;

[0009] When locating the center of the corneal lesion area, the locator is arranged inside the inner ring, and the locator includes a first cylinder, a triangular bracket and a handle, the triangular bracket is arranged on the upper edge of the first cylinder, the handle is arranged vertically at the end of the triangular bracket, and a central small hole is arranged at the center of the bottom surface of the first cylinder;

[0010] When cutting the diseased corneal area, the rotating disk is arranged inside the inner ring, and the rotating disk includes four handles and a second cylinder, the second cylinder is located at the lower end of the handle, and the drill is arranged at the lower end of the second cylinder;

[0011] The air pressure control system is connected to the lower base through an air pipe.

[0012] Preferably, the upper base, lower base, split ring and inner ring are all hollow cylinders, the inner wall of the upper base is provided with an internal thread, the lower base is provided with an air hole connected to the inner cavity of the ring drill, the lower end edge of the split ring is provided with a plurality of protrusions, and gaps are left between the split ring and the inner ring, and between the split ring and the lower base; the upper base, lower base, split ring and inner ring can be sealed and connected with glue.

[0013] Preferably, the outer wall of the second cylinder is provided with an external thread matching the internal thread of the upper base, and the external thread of the second cylinder is engaged with the internal thread of the upper base to drive the drill to move up and down.

[0014] Preferably, the finger support surface is oval, the lower end of the finger support surface is flush with the lower end of the finger support frame, and the finger support surface is provided with anti-slip stripes.

[0015] Preferably, the finger support has a wall thickness of 1.5 mm, and reinforcing ribs are provided on the contact surfaces between the finger support, the finger support surface and the outer circumferential surface of the upper base.

[0016] Preferably, both end surfaces of the positioner handle are provided with anti-slip stripes.

[0017] Preferably, the four handles of the turntable are evenly distributed around the center of the turntable, an identification handle is provided among the four handles, and identification stripes or silk screens are provided on the upper surface of the identification handle; the pitch of the turntable is fixed, and the drill moves down 0.25 mm for each rotation of the turntable.

[0018] Preferably, a mounting slot for a pin-type camera is provided at the upper end of the turntable, and the pin-type camera can be mounted on the turntable, and the pin-type camera is placed downward along the inner wall of the turntable.

[0019] Preferably, the number of the segmentation ring convex points is set to 16, and the impressions of the segmentation ring convex points on the corneal edge are marked with gentian violet.

[0020] Preferably, the gap between the lower base and the split ring, and the gap between the split ring and the inner ring are all 0.05 mm.

[0021] Preferably, the air pressure control system includes a voice module, a small air pump and a built-in power supply. The voice module is provided with a recognition password and a prompt sound. The voice module can control the small air pump to discharge gas or inhale gas; the built-in power supply can provide energy for the syringe.

[0022] The steps for using a recipient corneal trephine are:

[0023] S1: Connect a small air pump to one end of the air tube and seal it, and connect the other end of the air tube to the air hole connected to the inner cavity and seal it;

[0024] S2: Place the corneal trephine on the recipient cornea. The recipient cornea contacts the trephine inner cavity to form a sealed inner cavity. Hold the finger support with one hand and the handle with the other hand and install the locator in the inner ring. The locator is concentric with the inner ring, and the central hole of the locator is aligned with the center of the corneal lesion.

[0025] S3: The doctor says the command "inhale", and the voice module drives the small air pump to inhale. At this time, the inner cavity of the trephine is in the exhaust state. After the small air pump completes the "inhale" work, the voice module prompts "completed"; after the inner cavity of the trephine generates negative pressure, the recipient corneal trephine absorbs and fixes the cornea, and the locator is taken out;

[0026] S4: The drill is installed by sliding down from the inside of the inner ring from top to bottom. The drill is moved down by rotating the turntable, and the number of turns of the turntable is recorded. When the drill head reaches the required cutting depth of the cornea, the doctor says the "exhaust" command, so that the voice module drives the small air pump to exhaust the air, and the inner cavity of the ring drill is in the air intake state. After the small air pump completes the "exhaust" work, the voice module prompts "completed"; at this time, the recipient cornea is separated from the recipient corneal ring drill, and then the recipient corneal lesion area is carefully removed with tweezers;

[0027] S5: The 16 protrusions on the segmentation ring leave uniform marks on the edge of the recipient's cornea, and the recipient's corneal marks are marked with gentian violet.

[0028] The beneficial effects of the present invention are as follows:

[0029] 1. The present invention sets the locator handle into a vertical triangular bracket structure. When the doctor is locating the cornea, he holds the finger support with one hand and holds the locator handle with the other hand, and slides the locator from top to bottom and places it in the corneal trephine. The hand is not operated above the recipient corneal trephine, and the central hole of the locator is aligned with the central point of the corneal mark without obstruction, which is convenient for the doctor to observe and hold, does not block the doctor's line of sight, and realizes accurate positioning of the locator.

[0030] 2. The finger rest is set to a single-channel type. The single-channel type means that the lower end of the finger rest is flush with the lower end of the finger support frame. When holding the finger rest, there is enough space for the finger pulp to hold and operate the corneal trephine, which is convenient for the doctor to hold and operate the corneal trephine. The hand does not operate above the corneal trephine to avoid blocking the doctor's line of sight.

[0031] 3. The present invention uses silk screen printing or a boss to mark the position of one of the handles of the turntable, and the four handles are evenly distributed. The pitch of the turntable is fixed. The drill moves down 0.25 mm for each rotation of the turntable. When cutting the cornea, the distance the drill moves down can be determined by recording the number of rotations of the turntable, and the thickness of the cut cornea can also be determined. This method can ignore the proficiency of the doctor's technique and unify the thickness of the corneal cutting.

[0032] 4. The present invention adopts an air pressure control system, which includes a voice module, a small air pump and a built-in power supply. The voice module recognizes commands to control the small air pump to exhaust or inhale gas, thereby realizing the exhaust and intake process of corneal trephination. There is no need for a physician assistant to assist in operating the syringe, thus freeing up labor.

[0033] 5. The present invention arranges a pinhole camera on the inner wall of the turntable, which can clearly observe the cutting situation and the cutting process, thereby improving the success rate of corneal transplantation surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 It is a schematic structural diagram of the split ring of the present invention;

[0037] Figure 3 It is a structural schematic diagram of the finger support portion of the present invention;

[0038] Figure 4 It is a front view of the present invention;

[0039] Figure 5 For the present invention Figure 4 AA section view;

[0040] Figure 6 It is a structural schematic diagram of the positioner of the present invention;

[0041] Figure 7 A top view of the present invention;

[0042] Figure 8 It is a structural schematic diagram of a turntable and a drill bit of the present invention;

[0043] In the figure: upper base 1, lower base 2, dividing ring 3, inner ring 4, finger support 5, locator 6, turntable 7, drill 8, air hole 21, protrusion 31, finger support frame 51, finger support surface 52, first cylinder 61, triangular bracket 62, handle 63, center hole 64, handle 71, second cylinder 72, and mounting slot 73.

[0044] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0045] like Figures 1 to 8 As shown, a recipient corneal trephine according to the present invention comprises an upper base 1, a lower base 2, a split ring 3, an inner ring 4, a finger support 5, a positioner 6, a turntable 7, a drill 8, and an air pressure control system.

[0046] The upper base 1, the lower base 2, the split ring 3 and the inner ring 4 are all hollow cylinders. The lower base 2 is connected to the upper base 1, and the lower base 2 is sleeved with a split ring 3, and the split ring 3 is sleeved with an inner ring 4; the upper base 1, the lower base 2, the split ring 3, and the inner ring 4 are interconnected to form a trepanation cavity, and the trepanation cavity contacts the cornea to form a sealed trepanation cavity, and the recipient cornea acts as a sealing ring; the upper base 1, the lower base 2, the split ring 3, and the inner ring 4 can be sealed and connected by glue; the inner wall of the upper base 1 is provided with an internal thread, the lower base 2 is provided with an air hole connected to the trepanation cavity, the lower end edge of the split ring 3 is provided with a plurality of protrusions 31, and the inner ring has space for a positioner and a drill to pass through; a gap is left between the split ring 3 and the inner ring 4, and between the split ring 3 and the lower base 2.

[0047] When locating the center position of the corneal lesion area, the locator 6 is arranged inside the inner ring 4. The locator 6 includes a first cylinder 61, a triangular bracket 62 and a handle 63. The triangular bracket 62 is arranged on the upper edge of the first cylinder 61, and the handle 63 is vertically arranged at the end of the triangular bracket 62. A central hole 64 is provided in the center of the bottom surface of the first cylinder 61.

[0048] When cutting the corneal lesion area, the turntable 7 is arranged inside the inner ring 4. The turntable 7 includes four handles 71 and a second cylinder 72. The second cylinder 72 is located at the lower end of the handle 71, and the drill 8 is arranged at the lower end of the second cylinder 72.

[0049] The air pressure control system is connected to the lower base 2 through an air pipe.

[0050] As an embodiment of the present invention, after repeated tests, it is concluded that, preferably, the gaps between the lower base 2 and the split ring 3, and between the split ring 3 and the inner ring 4 are all 0.05 mm. When the air pressure control system discharges the gas in the inner cavity of the trephine through the air hole, the negative pressure generated in the inner cavity of the trephine effectively adsorbs and fixes the cornea on the trephine.

[0051] As an embodiment of the present invention, the number of protrusions 31 of the segmentation ring 3 is set to 16, and the lower end of the protrusions of the segmentation ring 3 is flush with the lower end of the inner ring 4. When the cornea is adsorbed and fixed on the recipient corneal ring drill, the protrusions 31 press the recipient cornea and leave an imprint on the edge of the recipient cornea. After the corneal disease area is cut, the imprint on the edge of the recipient cornea is marked with gentian violet liquid, so that the cornea can be sutured more evenly during suturing, thereby preventing the occurrence of complications such as myopia and astigmatism in the later stage and improving the success rate of corneal transplantation.

[0052] Two symmetrical finger supports 5 are arranged on the outer side of the upper base 1, and the finger supports 5 include a finger support frame 51 and a finger support surface 52; the wall thickness of the finger support frame 51 is 1.5 mm, and the contact surface between the finger support frame 51, the finger support surface 52 and the outer cylindrical surface of the upper base 1 is provided with reinforcing ribs. The reinforcing ribs are a design element for enhancing the structural strength. Usually, a reinforcing plate is added to the common vertical surface of the two combined bodies to improve the strength and rigidity of the combined surface, and can also provide support and other functions. It is suitable for the design of various mechanical parts. In the present invention, the design of the reinforcing ribs makes it easy for the doctor to straighten the corneal trephine during the operation, and it is not easy to deform the corneal trephine, thereby improving the service life of the corneal trephine. The finger rest surface 52 is oval in shape, and the lower end of the finger rest surface 52 is flush with the lower end of the finger support frame 51 and the finger rest surface 52 is provided with anti-slip stripes. Furthermore, the finger rest surface 52 is designed to be single-channel type, which means that the lower end of the finger rest surface 52 is flush with the lower end of the finger support frame 51. When the doctor performs corneal positioning and corneal cutting, when the doctor holds the finger rest surface 52 with his fingers to operate, there is enough gripping space for the finger pulp, which is convenient for the doctor to hold and operate the corneal trephine. The hand does not operate above the corneal trephine to avoid blocking the doctor's line of sight. The anti-slip stripes provided on the finger rest surface 52 are used to increase the friction between the fingers and the finger rest surface, which is convenient for holding the corneal trephine and preventing the corneal trephine from falling off during operation.

[0053] As an embodiment of the present invention, when the doctor locates the center position of the corneal lesion area, he first places the corneal trephine on the cornea. After the cornea contacts the inner cavity of the trephine, a sealed inner cavity of the trephine is formed, and the cornea is equivalent to a sealing ring. In the structural design of the locator 6 of the present invention, the handle 63 is set to a structure of a vertical triangular bracket 62. When locating the center position of the corneal lesion area, hold the handle 63 with your fingers, slide the locator 6 from top to bottom and install it in the inner ring 4 of the corneal trephine, and align the central small hole 64 of the first cylinder 61 with the center position of the corneal lesion area. During the entire operation, the hand does not operate above the corneal trephine so as not to block the doctor's line of sight, and the center position of the corneal lesion area can be located more quickly and accurately. In addition, anti-slip stripes are set on both end surfaces of the handle 63, which can increase the friction between the fingers and the handle to facilitate gripping and anti-slip.

[0054] As an embodiment of the present invention, the turntable 7 and the drill 8 can be connected by glue, and the outer wall of the second cylinder 72 of the turntable 7 is provided with an external thread matching the internal thread of the upper base 1, and the external thread of the second cylinder 72 is engaged with the internal thread of the upper base 1 to drive the drill 8 to move up and down; when the doctor cuts the corneal lesion area, he holds the finger support with one hand, holds the turntable 7 with the other hand and slides the turntable 7 from top to bottom to install it in the inner ring 4, turns the handle 71, and the drill moves downward to perform the corneal cutting work; further, the four handles 71 of the turntable are evenly distributed around the center of the turntable 7, and the four handles 71 are provided with identification handles, and the upper surface of the identification handles is provided with identification stripes or silk screen; the pitch of the turntable 7 is fixed, and the drill moves down 0.25mm for each rotation of the turntable 7. When cutting the corneal lesion area, the distance the drill 8 moves down can be determined by recording the number of turns of the turntable 7, and the thickness of the cut cornea can also be determined. This method can ignore the proficiency of the doctor's technique and unify the thickness of the corneal cutting.

[0055] As an embodiment of the present invention, a mounting slot 73 for a pin-type camera is provided at the upper end of the turntable 7, and the turntable 7 can be mounted with the pin-type camera, which is placed downward along the inner wall of the turntable 7. The pin-type camera can be used in conjunction with a display to magnify the surgical image, allowing the doctor to clearly observe the insertion and cutting process, thereby improving the success rate of the operation.

[0056] As an embodiment of the present invention, the air pressure control system includes a voice module, a small air pump and a built-in power supply, which are not shown in the figure in this embodiment; when in use, one end of the trachea is connected to the small air pump, and the other end is connected to the air hole 21 connected to the inner cavity of the trephine, and the small air pump is used to inhale and exhaust the inner cavity of the trephine through the trachea. The voice module is provided with a recognition command and a prompt tone, the recognition command is "intake" and "exhaust", and the prompt tone is "completed"; the voice module can control the small air pump to discharge gas or inhale gas; the built-in power supply can provide energy for the syringe. The specific usage process is: when the doctor says "exhaust", the voice module recognizes the "exhaust" command and triggers the small air pump to exhaust. At this time, the inner cavity of the trephine is inhaled through the air hole, and the inner cavity of the trephine is in an air intake state. When the small air pump completes the "exhaust" action, the voice module prompts "completed"; when the doctor says "inhale", the voice module recognizes the "inhale" command and triggers the small air pump to inhale. At this time, the inner cavity of the trephine exhausts air to the trachea through the air hole to generate negative pressure, and the inner cavity of the trephine is in an exhaust state. When the small air pump completes the "inhale" action, the voice module prompts "completed".

[0057] The steps for using a recipient corneal trephine are:

[0058] S1: Connect a small air pump to one end of the air tube and seal it, and connect the other end of the air tube to the air hole connected to the inner cavity and seal it;

[0059] S2: Place the corneal trephine on the recipient cornea, and the recipient cornea contacts the inner cavity of the trephine to form a sealed inner cavity. Hold the finger support surface 52 with one hand, and hold the handle with the other hand to install the locator 6 in the inner ring. The locator 6 is concentric with the inner ring 4, and the central small hole 64 of the locator 6 is aligned with the central position of the corneal lesion.

[0060] S3: The doctor says the command "inhale", so that the voice module drives the small air pump to inhale. At this time, the inner cavity of the trephine is in the exhaust state. After the small air pump completes the "inhale" work, the voice module prompts "completed"; after the inner cavity of the trephine generates negative pressure, the recipient corneal trephine absorbs and fixes the cornea, and the locator 6 is taken out;

[0061] S4: The drill 8 is installed by sliding down from the inside of the inner ring 4 from top to bottom. The drill 8 is moved downward by rotating the turntable 7, and the number of rotations of the turntable 7 is recorded. The head of the drill 8 circumcises the cornea. When the required cutting depth is reached, the doctor speaks the "exhaust" command, so that the voice module drives the small air pump to exhaust the air, and the inner cavity of the circumferential drill is in the air intake state. When the small air pump completes the "exhaust" work, the voice module prompts "completed"; at this time, the recipient cornea is separated from the recipient corneal circumferential drill, and then the recipient corneal diseased area is carefully removed with tweezers;

[0062] S5: The 16 protrusions 31 on the segmentation ring 3 leave uniform marks on the edge of the recipient cornea, and gentian violet is used to mark the recipient cornea marks to make the subsequent corneal suture more uniform and prevent the occurrence of complications such as myopia and astigmatism.

[0063] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A recipient corneal trephine, characterized in that: It comprises an upper base (1), a lower base (2), a split ring (3), an inner ring (4), a finger support (5), a positioner (6), a turntable (7), a drill (8), and an air pressure control system; The lower base (2) is connected to the lower part of the upper base (1), a split ring (3) is sleeved inside the lower base (2), and an inner ring (4) is sleeved inside the split ring (3); the upper base (1), the lower base (2), the split ring (3), and the inner ring (4) are connected to each other to form a trephine inner cavity, and the trephine inner cavity forms a sealed trephine inner cavity after contacting the cornea; Two symmetrical finger support portions (5) are arranged on the outer side of the upper base (1), and the finger support portions (5) include a finger support frame (51) and a finger support surface (52); When locating the center position of the corneal lesion area, the locator (6) is arranged inside the inner ring (4), and the locator (6) comprises a first cylinder (61), a triangular bracket (62) and a handle (63), wherein the triangular bracket (62) is arranged on the upper edge of the first cylinder (61), and the handle (63) is arranged vertically at the end of the triangular bracket (62), and a central small hole (64) is arranged at the center of the bottom surface of the first cylinder (61); When cutting the corneal lesion area, the rotating disk (7) is arranged inside the inner ring (4), the rotating disk (7) comprises four handles (71) and a second cylinder (72), the second cylinder (72) is located at the lower end of the handle (71), and the drill (8) is arranged at the lower end of the second cylinder (72); The air pressure control system is connected to the lower base (2) via an air pipe.

2. A recipient corneal trephine according to claim 1, characterized in that: The upper base (1), the lower base (2), the split ring (3) and the inner ring (4) are all hollow cylinders. The inner wall of the upper base (1) is provided with an internal thread. The lower base (2) is provided with an air hole (21) connected to the inner cavity of the trephine. The lower end edge of the split ring (3) is provided with a plurality of protrusions (31). Gaps are left between the split ring (3) and the inner ring (4), and between the split ring (3) and the lower base (2). The upper base (1), the lower base (2), the split ring (3) and the inner ring (4) can be sealed and connected by glue.

3. A recipient corneal trephine according to claim 1, characterized in that: The outer wall of the second cylindrical body (72) is provided with an external thread that matches the internal thread of the upper base (1); the external thread of the second cylindrical body (72) meshes with the internal thread of the upper base (1) to drive the drill to move up and down.

4. A recipient corneal trephine according to claim 1, characterized in that: The finger support surface (52) is oval in shape, the lower end of the finger support surface (52) is flush with the lower end of the finger support frame (51), and the finger support surface (52) is provided with anti-slip stripes.

5. A recipient corneal trephine according to claim 1, characterized in that: The finger support frame (51) has a wall thickness of 1.5 mm, and the contact surfaces between the finger support frame (51), the finger support surface (52) and the outer circumferential surface of the upper base (1) are provided with reinforcing ribs.

6. A recipient corneal trephine according to claim 1, characterized in that: Both end surfaces of the handle (63) of the positioner (6) are provided with anti-slip stripes.

7. A recipient corneal trephine according to claim 1, characterized in that: The four handles (71) of the turntable (7) are evenly distributed around the center of the turntable (7); a marking handle is provided among the four handles (71); and a marking stripe or silk screen is provided on the upper surface of the marking handle; the pitch of the turntable is fixed, and the drill moves down 0.25 mm for each rotation of the turntable (7).

8. A recipient corneal trephine according to claim 1, characterized in that: The upper end of the rotating disk (7) is provided with a mounting slot (73) for a pin-type camera, and the rotating disk (7) can be sleeved with the pin-type camera, which is placed downward along the inner wall of the rotating disk (7).

9. A recipient corneal trephine according to claim 1, characterized in that: The number of convex points of the segmentation ring (4) is set to 16, and the impressions of the convex points of the segmentation ring (4) on the edge of the cornea are marked with gentian violet.

10. A recipient corneal trephine according to claim 1, characterized in that: The gaps between the lower base (2) and the split ring (3), and between the split ring (3) and the inner ring (4) are all 0.05 mm.

11. A recipient corneal trephine according to claim 1, characterized in that: The air pressure control system includes a voice module, a small air pump and a built-in power supply. The voice module is provided with a recognition password and a prompt sound. The voice module can control the small air pump to discharge or inhale gas; the built-in power supply can provide energy for the syringe.

12. The method for using the recipient corneal trephine according to any one of claims 1 to 11, characterized in that: The steps for using a recipient corneal trephine are: S1: Connect a small air pump to one end of the trachea and seal it, and connect the other end of the trachea to the air hole (21) connected to the inner cavity of the trephine and seal it; S2: Place the corneal trephine on the recipient cornea, and the recipient cornea contacts the inner cavity of the trephine to form a sealed inner cavity. Hold the finger support surface (52) with one hand, hold the handle (63) with the other hand and install the locator (6) in the inner ring (4). The locator (6) is concentric with the inner ring (4), and the central small hole (64) of the locator (6) is aligned with the central position of the corneal lesion. S3: The doctor says the command "inhale", so that the voice module drives the small air pump to inhale. At this time, the inner cavity of the trephine is in the exhaust state. After the small air pump completes the "inhale" work, the voice module prompts "completed"; after the inner cavity of the trephine generates negative pressure, the recipient corneal trephine absorbs and fixes the cornea, and the locator is removed (6); S4: The drill (8) is installed by sliding down from the inside of the inner ring (4) from top to bottom. The drill (8) is moved downward by rotating the turntable (7). The number of rotations of the turntable (7) is recorded. The head of the drill (8) cuts the cornea in a circular manner. When the required cutting depth is reached, the doctor speaks the "exhaust" command, so that the voice module drives the small air pump to exhaust the air. The inner cavity of the trepanation is in an air intake state. When the small air pump completes the "exhaust" work, the voice module prompts "completed". At this time, the recipient cornea is separated from the recipient corneal trepanation, and then the lesion area of ​​the recipient cornea is carefully removed with tweezers; S5: The 16 protrusions (31) on the segmentation ring (3) leave uniform marks on the edge of the recipient's cornea, and the recipient's cornea is marked with gentian violet.

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