Simulation device for retina laser photocoagulation training

Abstract

The invention relates to the technical field of retina laser photocoagulation training, and particularly discloses a simulation device for retina laser photocoagulation training, which comprises a shell, the shell comprises a first hemisphere and a second hemisphere, a plurality of buckle mechanisms are arranged on the outer ring of the first hemisphere along the circumferential direction of the first hemisphere, and the buckle mechanisms are arranged on the outer ring of the second hemisphere along the circumferential direction of the second hemisphere. The buckle mechanism comprises a supporting block, and the bottom of the supporting block is fixedly connected with an insertion rod. The detachable shell structure is adopted, the first hemisphere and the second hemisphere achieve double locking through magnetic adsorption of the first magnet ring and the second magnet ring and mechanical insertion connection of the insertion rod and the insertion hole, it is ensured that connection is stable, disassembly and assembly are convenient, the problems that animal eyeballs are prone to deterioration and cannot be repeatedly used are solved, source limitation is avoided, and the training cost is reduced.

Description

Technical Field

[0001] This invention belongs to the field of retinal laser photocoagulation training technology, and specifically relates to a simulation device for retinal laser photocoagulation training. Background Technology

[0002] Retinal laser photocoagulation training refers to a process in which ophthalmologists or medical students learn and master the technique of using laser equipment to precisely irradiate and coagulate retinal disease areas before formally treating patients, through simulating a real clinical operating environment. The aim is to improve the accuracy, stability, and safety of surgical procedures, so as to effectively treat fundus diseases such as diabetic retinopathy and retinal tears while avoiding damage to healthy tissues.

[0003] Existing training methods face prominent problems in actual teaching and skills development, such as scarce operational resources, high costs, and unstable training effects. Currently, novice doctors mainly rely on actual laser operation training on animal eyeballs or use high-cost virtual reality surgical simulators for simulation practice. Although animal eyeball models have a certain degree of realism in terms of tissue structure and laser response, they suffer from problems such as unstable biological material sources, demanding storage conditions, easy spoilage and deterioration, and being scrapped after a single use. This results in high training costs and makes it difficult to achieve standardized teaching. While existing VR simulators can provide a three-dimensional visualization environment and a certain degree of interactive feedback, their equipment is expensive, maintenance is complex, and they generally suffer from problems such as lack or distortion of tactile feedback, operation delays, and poor compatibility with real laser equipment. They cannot realistically reproduce the resistance felt when moving a handheld laser probe on the surface of the eyeball, the subtle adjustments during focusing, and the tissue feedback during laser perforation, resulting in a significant gap between training effects and real surgery.

[0004] To address these issues, the applicant proposes a simulation device for training in retinal laser photocoagulation. Summary of the Invention

[0005] The purpose of this invention is to provide a simulation device for training in retinal laser photocoagulation, in order to solve the problems in the existing training methods mentioned above that rely on animal eyeballs or VR simulators. The former has problems such as difficulty in preservation, high cost, and non-reproducibility, while the latter is expensive, has distorted tactile sensation, and poor compatibility. Both are difficult to achieve low-cost, high-simulation, and reproducible standardized teaching, which restricts the popularization and effectiveness of retinal laser photocoagulation training.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A simulation device for training retinal laser photocoagulation includes a housing comprising a first hemisphere and a second hemisphere. A plurality of snap-fit ​​mechanisms are arranged around the outer circumference of the first hemisphere, each snap-fit ​​mechanism including a support block. A rod is fixedly connected to the bottom of the support block. A plurality of receiving mechanisms are arranged around the outer circumference of the second hemisphere, each receiving mechanism including a connecting block. The top of the connecting block has an insertion hole adapted to the rod. A plurality of fixing pins are arranged on the inner surface of the second hemisphere. A sleeve is fixedly connected to one side of the second hemisphere.

[0008] Preferably, the inner cavity of the sleeve is provided with a spring telescopic rod, and the two ends of the spring telescopic rod are respectively fixedly connected with connecting buckles.

[0009] Preferably, the inner wall of the spring telescopic rod is slidably connected to the inner cavity of the adjacent sleeve.

[0010] Preferably, an mounting block is provided below the fixing nail, and the top of the mounting block is fixedly connected to the bottom of the adjacent fixing nail.

[0011] Preferably, a plurality of the mounting blocks are arranged in a circumferential array within the cavity of the second hemisphere.

[0012] Preferably, a first magnet ring is fixedly connected to the lower surface of the first hemisphere, and a second magnet ring is fixedly connected to the upper surface of the second hemisphere, with the top of the second magnet ring and the bottom of the first magnet ring connected by magnetic connection.

[0013] Preferably, the outer ring of the spring telescopic rod is provided with sliding grooves on both sides, and the outer ring of the sleeve is provided with sliding mechanisms on both sides. The sliding mechanism includes a fixed seat, and a connecting slide rod is fixedly connected to both sides of the fixed seat. One end of the connecting slide rod is slidably connected to the inner cavity of the adjacent sliding groove.

[0014] Preferably, one side of the fixing seat is fixedly connected to one side of the adjacent sleeve, and a plurality of rubber anti-slip pads are fixedly connected to one side of the fixing seat and along the horizontal direction of the fixing seat.

[0015] Preferably, a limiting mechanism is provided below the sleeve. The limiting mechanism includes a housing. One side of the housing is fixedly connected to one end of an adjacent sleeve. A limiting rod is vertically provided in the inner cavity of the housing. A baffle is sleeved on the outer ring of the limiting rod. A return spring is sleeved on the outer ring of the limiting rod. One end of the limiting rod passes through the side wall of the adjacent sleeve and abuts against one side of the spring telescopic rod. The other end of the limiting rod passes through the side wall of the adjacent housing and is fixedly connected to a handle. One end of the return spring is fixedly connected to one side of the adjacent baffle, and the other end of the return spring is fixedly connected to the inner wall of the adjacent housing. The other side of the baffle abuts against one end of the adjacent sleeve.

[0016] Preferably, a sensing and communication module is installed in the inner cavity of the first hemisphere and the inner cavity of the second hemisphere respectively. The sensing and communication module includes a laser position detection unit, an operation duration recording unit, a microcontroller, and a wireless communication unit. The output terminals of the laser position detection unit and the operation duration recording unit are respectively connected to the input interfaces of the corresponding microcontrollers through signal lines. The output interface of the microcontroller is connected to the input terminal of the wireless communication unit through signal lines.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This solution employs a detachable shell structure, with the first and second hemispheres achieving dual locking through magnetic adsorption of magnet ring one and magnet ring two, and mechanical insertion of the plug rod and the socket. This ensures a stable connection and facilitates easy assembly and disassembly, solving the problems of easily deteriorated and non-reusable animal eyeballs, avoiding source limitations, and reducing training costs. The second hemisphere contains fixing nails and mounting blocks, allowing for quick replacement of training cards printed with different fundus lesions, enabling standardized teaching for multiple diseases. This compensates for the uncontrollable lesions in animal models and the limitations of fixed content in VR systems. The mounting blocks are arranged in a circumferential array, enhancing structural strength and durability. The sleeve, combined with the spring telescopic rod and connecting buckle, allows the device to be adapted to various commonly used clinical lamp stands without the need for specialized equipment, improving versatility and portability. This solves the problem of the difficulty in popularizing high-cost VR simulators and is suitable for grassroots teaching and daily training. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the chute structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the second structure of the magnet ring of the present invention;

[0022] Figure 4 This is a schematic diagram of the support block structure of the present invention;

[0023] Figure 5 For the present invention Figure 3 Enlarged view of point A in the middle;

[0024] Figure 6 This is a schematic diagram of the connecting slide bar structure of the present invention;

[0025] Figure 7 This is a cross-sectional view of the outer casing of the present invention.

[0026] In the diagram: 1. Shell; 101. First hemisphere; 102. Second hemisphere; 2. Buckling mechanism; 201. Support block; 202. Insert rod; 3. Receiving mechanism; 301. Connecting block; 302. Insertion hole; 4. Sleeve; 5. Spring telescopic rod; 6. Connecting buckle; 7. Magnet ring one; 8. Mounting block; 9. Fixing nail; 10. Magnet ring two; 11. Slide groove; 12. Sliding mechanism; 1201. Fixing seat; 1202. Connecting slide rod; 1203. Rubber anti-slip pad; 13. Limiting mechanism; 1301. Shell; 1302. Limiting rod; 1303. Baffle; 1304. Return spring. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] Example 1:

[0031] Please see Figure 1As shown in Figure 7, a simulation device for training retinal laser photocoagulation includes a housing 1, which comprises a first hemisphere 101 and a second hemisphere 102. A plurality of latching mechanisms 2 are arranged around the outer circumference of the first hemisphere 101 and along its circumferential direction. Each latching mechanism 2 includes a support block 201, with a rod 202 fixedly connected to the bottom of the support block 201. A plurality of receiving mechanisms 3 are arranged around the outer circumference of the second hemisphere 102 and along its circumferential direction. Each receiving mechanism 3 includes a connecting block 301, with a socket 302 at the top of the connecting block 301 that is compatible with the rod 202. A plurality of fixing nails 9 are arranged on the inner surface of the second hemisphere 102, and a sleeve 4 is fixedly connected to one side of the second hemisphere 102.

[0032] The inner cavity of the sleeve 4 is provided with a spring telescopic rod 5, and the two ends of the spring telescopic rod 5 are respectively fixedly connected with connecting buckles 6.

[0033] As can be seen from the above, when training for retinal laser photocoagulation is required, the operator first removes the second hemisphere 102 from the first hemisphere 101 or keeps it separate. Then, a training card printed with simulated fundus lesions, such as typical lesions like diabetic retinopathy and retinal tears, is prepared and placed into the inner cavity of the second hemisphere 102. At this time, several fixing pins 9 located on the inner surface of the second hemisphere 102 will pass through the reserved holes or edge areas on the training card to achieve initial positioning and limiting of the card, preventing it from sliding or shifting in subsequent operations. The bottom of the fixing pins 9 is stably connected to the inner wall of the second hemisphere 102 through the mounting blocks 8. Several mounting blocks 8 are distributed in a circumferential array in the inner cavity of the second hemisphere 102. This not only enhances the structural strength of the fixing pin 9, preventing it from loosening or breaking due to repeated insertion and removal of the training card, but also ensures the card's flat and snug fit within the spherical cavity, improving the spatial consistency of the simulated image. After the card is installed, the operator brings the first hemisphere 101 and the second hemisphere 102 together, gradually bringing them closer along the joint surface. During this process, the magnet ring 7 on the lower surface of the first hemisphere 101 and the magnet ring 10 on the upper surface of the second hemisphere 102 generate a magnetic attraction due to the attraction of opposite magnetic poles, guiding the two hemispheres to accurately align and achieve initial fit. This magnetic connection method not only reduces the difficulty of alignment and improves assembly efficiency but also provides pre-tightening force for subsequent mechanical locking. As the two hemispheres... Further closing, the insert rods 202 in the multiple snap-fit ​​mechanisms 2 distributed along the circumference of the outer ring of the first hemisphere 101 are sequentially inserted into the insertion holes 302 in the receiving mechanisms 3 at corresponding positions on the outer ring of the second hemisphere 102. This insertion structure is mechanically supported by the support block 201, ensuring that the insert rods 202 are not easily bent or broken during insertion and use, thus forming a reliable mechanical lock. Together with the magnetic adsorption of the first magnet ring 7 and the second magnet ring 10, it forms a double fixing mechanism, effectively preventing the shell 1 from being accidentally opened or loosened due to external disturbances during training, ensuring the stability of the simulated environment; finally, in order to fix the entire simulation device to the practice lamp stand of the indirect ophthalmoscope or slit lamp microscope used in actual training, the operator The operator uses a sleeve 4 located on one side of the second hemisphere 102, the inner cavity of which is equipped with a spring telescopic rod 5. The inner surface of the spring telescopic rod 5 is fixedly connected to the outer surface of the sleeve 4 to maintain structural stability. Both ends are connected with connecting buckles 6. By manually compressing the spring telescopic rod 5, the distance between the two connecting buckles 6 can be adjusted to adapt to the bracket diameter of different types of lamp holders and be firmly locked onto them, thereby realizing the overall installation of the simulation device. At this time, the operator can use a real laser probe to focus and irradiate the through hole opened on the first hemisphere 101, observe the lesion image on the training card inside the first hemisphere 101, simulate the laser target hitting process in clinical practice, and complete a complete retinal laser photocoagulation training process.

[0034] This solution effectively solves the problems of easy decay and non-reusability of existing animal eye models by adopting a detachable shell 1 structure composed of a first hemisphere 101 and a second hemisphere 102, combined with the magnetic adsorption of magnet ring 1 and magnet ring 2 10 and the mechanical insertion of plug rod 202 and plug hole 302 for dual locking. It realizes the reusable assembly and long-term use of training components, reduces the cost of a single training session, and avoids the instability of animal tissue sources. By setting a card fixing system composed of fixing nails 9 and mounting blocks 8 in the second hemisphere 102, training cards of different diseases and lesion degrees can be quickly replaced to meet diverse and standardized teaching needs, overcoming the defects of uncontrollable animal eye lesions and the difficulty in updating fixed VR simulator content. The circumferential array distribution design of mounting blocks 8 enhances the overall rigidity and durability of the fixing structure and adapts to the operation scenario of frequent card replacement. The combination structure of sleeve 4, spring telescopic rod 5 and connecting buckle 6 makes the device compatible with a variety of common clinical examination equipment brackets, improving the versatility and portability of the device, and solving the problem of high-cost VR simulators relying on dedicated hardware and being difficult to popularize.

[0035] Example 2:

[0036] Please see Figure 1 As shown in Figure 7, the inner wall of the spring telescopic rod 5 is fixedly connected to the outer wall of the adjacent sleeve 4.

[0037] A mounting block 8 is provided below the fixing nail 9, and the top of the mounting block 8 is fixedly connected to the bottom of the adjacent fixing nail 9.

[0038] Several mounting blocks 8 are arranged in a circular array within the cavity of the second hemisphere 102.

[0039] A magnet ring 7 is fixedly connected to the lower surface of the first hemisphere 101, and a magnet ring 10 is fixedly connected to the upper surface of the second hemisphere 102. The top of the magnet ring 10 and the bottom of the magnet ring 7 are magnetically connected.

[0040] As can be seen from the above, by setting a spring telescopic rod 5 inside the sleeve 4 and fixing the connecting buckles 6 at both ends, when installing the simulation device onto practice lamp holders of different specifications, the distance between the two connecting buckles 6 can be adjusted by compressing the spring telescopic rod 5 to adapt to the bracket and achieve elastic clamping. This achieves a stable, adjustable, and easy-to-disassemble connection between the device and the lamp holder, improving the adaptability and ease of use of the equipment. By fixing the inner wall of the spring telescopic rod 5 to the outer wall of the adjacent sleeve 4, the spring telescopic rod 5 always moves stably along the axial direction of the sleeve 4 during the extension and retraction process, avoiding lateral offset or shaking, ensuring uniform force and clamping stability of the connecting buckles 6, and achieving the effects of enhancing the overall rigidity of the structure, preventing loosening, and extending service life. By setting an installation block 8 below the fixing nail 9 and fixing the top of the installation block 8 to the bottom of the fixing nail 9, repeated insertion and removal can prevent the device from slipping. During the training card process, the mounting block 8 provides a solid support foundation for the fixing nail 9, distributing the force and preventing the fixing nail 9 from deforming or breaking due to long-term stress. This achieves the effect of improving the strength and durability of the fixed structure. By setting several mounting blocks 8 in a circumferential array distributed in the inner cavity of the second hemisphere 102, the force on each fixing nail 9 is evenly distributed, enhancing the overall structural stability of the inner wall of the second hemisphere 102, avoiding local stress concentration, and facilitating the flat fixing of the training card. This achieves the effect of improving assembly reliability and stability. The magnetic connection between the two is achieved by fixing the lower surface of the first hemisphere 101 with a magnet ring 7 and the upper surface of the second hemisphere 102 with a magnet ring 10. When the two hemispheres are closed, quick alignment and pre-fixation can be achieved, guiding the insertion rod 202 to accurately insert into the insertion hole 302. This simplifies the assembly operation, improves connection efficiency, and enhances the sealing and fit.

[0041] Example 3:

[0042] Please see Figure 1 As shown in Figure 7, the outer ring of the spring telescopic rod 5 has grooves 11 on both sides, and the outer ring of the sleeve 4 has sliding mechanisms 12 on both sides. The sliding mechanism 12 includes a fixed seat 1201, and a connecting slide rod 1202 is fixedly connected to both sides of the fixed seat 1201. One end of the connecting slide rod 1202 is slidably connected to the inner cavity of the adjacent groove 11.

[0043] One side of the fixed base 1201 is fixedly connected to one side of the adjacent sleeve 4, and several rubber anti-slip pads 1203 are fixedly connected to one side of the fixed base 1201 and along the horizontal direction of the fixed base 1201.

[0044] A limiting mechanism 13 is provided below the sleeve 4. The limiting mechanism 13 includes a housing 1301. One side of the housing 1301 is fixedly connected to one end of the adjacent sleeve 4. A limiting rod 1302 is vertically provided in the inner cavity of the housing 1301. A baffle 1303 is sleeved on the outer ring of the limiting rod 1302. A return spring 1304 is sleeved on the outer ring of the limiting rod 1302. One end of the limiting rod 1302 passes through the side wall of the adjacent sleeve 4 and abuts against one side of the spring telescopic rod 5. The other end of the limiting rod 1302 passes through the side wall of the adjacent housing 1301 and is fixedly connected to a handle. One end of the return spring 1304 is fixedly connected to one side of the adjacent baffle 1303. The other end of the return spring 1304 is fixedly connected to the inner wall of the adjacent housing 1301. The other side of the baffle 1303 abuts against one end of the adjacent sleeve 4.

[0045] As can be seen from the above: when the operator needs to adjust the position of the sleeve 4 to adapt to different training needs, the operator pulls down the handle connected to the limit rod 1302 in the limit mechanism 13, so that the limit rod 1302 overcomes the elastic force of the return spring 1304 and moves vertically downward along the inner cavity of the outer shell 1301. At this time, one end of the limit rod 1302 disengages from the contact state with the outer wall of the spring telescopic rod 5, releasing the axial lock on the sleeve 4. Then the operator pushes the fixed seat 1201. Since the fixed seat 1201 is fixedly connected to the sleeve 4, and the connecting slide rods 1202 on both sides of the fixed seat 1201 are embedded in the slide groove 11 opened on the outer ring of the spring telescopic rod 5 and can slide along its length, the sleeve 4 can be adjusted. The outer periphery of the spring telescopic rod 5 achieves smooth horizontal displacement, causing the entire housing 1 to adjust its position relative to the external support structure connected to the spring telescopic rod 5. When the housing 1 moves to the required training angle or spatial position, the operator releases the grip. Under the elastic restoring force of the return spring 1304, the stop plate 1303 is pushed and transmits the force to the limit rod 1302, causing it to automatically reset and re-press against the outer wall of the spring telescopic rod 5, thereby achieving re-locking of the sleeve 4 and completing the position adjustment and fixing process. The entire operation process does not require tool assistance; quick unlocking, translation, and self-locking can be achieved simply by manually operating the grip. The structure is highly responsive and has high repeatability.

[0046] Example 4

[0047] Please see Figure 1 As shown in Figure 7, sensing and communication modules are respectively installed in the inner cavity of the first hemisphere 101 and the inner cavity of the second hemisphere 102. The sensing and communication modules include a laser position detection unit, an operation duration recording unit, a microcontroller, and a wireless communication unit. The output terminals of the laser position detection unit and the operation duration recording unit are respectively connected to the input interfaces of the corresponding microcontrollers through signal lines. The output interface of the microcontroller is connected to the input terminal of the wireless communication unit through signal lines.

[0048] As can be seen from the above: When the operator uses the laser probe to perform retinal photocoagulation training on the simulation device, the laser beam passes through the first hemisphere 101 and illuminates the training card installed in the cavity of the second hemisphere 102. At this time, the laser position detection unit set in the cavity of the first hemisphere 101 or the second hemisphere 102 senses the landing position of the laser spot in real time and transmits the corresponding position signal to the input interface of the microcontroller through the signal line. At the same time, the operation duration recording unit records the start time, duration, and operation time of each stage of the training, and sends the time data to the microcontroller through another signal line. After receiving the above position and time information, the microcontroller combines the pre-stored training standards, such as the lesion area range, recommended number and spacing of spots, etc., to perform local calculations and evaluations, and generates a result containing... Structured training data, including target accuracy, coverage integrity, and operational efficiency, is generated. Subsequently, the microcontroller transmits this data via signal lines to the wireless communication unit through its output interface. The wireless communication unit then wirelessly uploads the data to external terminal devices, such as teaching tablets, mobile apps, or hospital training cloud platforms, via Bluetooth or Wi-Fi protocols. Teachers or students can view the operation trajectory playback, automatic scoring results, and improvement suggestions in real time on the terminal devices, achieving objective quantification and remote feedback of the training process. The entire sensing and communication process operates automatically in the closed state of the housing 1, requiring no additional operation. Furthermore, the module is integrated into the hemispherical cavity, without affecting the original card replacement, housing 1 disassembly and assembly, or lamp holder adaptation functions. This approach balances physical simulation with digital intelligence, significantly improving the standardization level of training and teaching efficiency.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A simulation device for training in retinal laser photocoagulation, comprising a housing (1), characterized in that: The housing (1) includes a first hemisphere (101) and a second hemisphere (102). A plurality of snap-fit ​​mechanisms (2) are provided on the outer ring of the first hemisphere (101) and along the circumferential direction of the first hemisphere (101). The snap-fit ​​mechanism (2) includes a support block (201). A plug rod (202) is fixedly connected to the bottom of the support block (201). A plurality of receiving mechanisms (3) are provided on the outer ring of the second hemisphere (102) and along the circumferential direction of the second hemisphere (102). The receiving mechanism (3) includes a connecting block (301). A plug hole (302) adapted to the plug rod (202) is opened on the top of the connecting block (301). A plurality of fixing nails (9) are provided on the inner surface wall of the second hemisphere (102). A sleeve (4) is fixedly connected to one side of the second hemisphere (102).

2. The simulation device for training retinal laser photocoagulation according to claim 1, characterized in that: The inner cavity of the sleeve (4) is provided with a spring telescopic rod (5), and the two ends of the spring telescopic rod (5) are respectively fixedly connected with connecting buckles (6).

3. The simulation device for training retinal laser photocoagulation according to claim 2, characterized in that: The inner wall of the spring telescopic rod (5) is slidably connected to the inner cavity of the adjacent sleeve (4).

4. The simulation device for training retinal laser photocoagulation according to claim 1, characterized in that: An installation block (8) is provided below the fixing nail (9), and the top of the installation block (8) is fixedly connected to the bottom of the adjacent fixing nail (9).

5. A simulation device for training retinal laser photocoagulation according to claim 4, characterized in that: Several of the mounting blocks (8) are arranged in a circular array within the cavity of the second hemisphere (102).

6. The simulation device for training retinal laser photocoagulation according to claim 1, characterized in that: A magnet ring 1 (7) is fixedly connected to the lower surface of the first hemisphere (101), and a magnet ring 2 (10) is fixedly connected to the upper surface of the second hemisphere (102). The top of the magnet ring 2 (10) and the bottom of the magnet ring 1 (7) are magnetically connected.

7. A simulation device for training retinal laser photocoagulation according to claim 3, characterized in that: The outer ring of the spring telescopic rod (5) is provided with sliding grooves (11) on both sides, and the outer ring of the sleeve (4) is provided with sliding mechanisms (12) on both sides. The sliding mechanism (12) includes a fixed seat (1201). The two sides of the fixed seat (1201) are respectively fixedly connected with connecting slide rods (1202). One end of the connecting slide rod (1202) is slidably connected to the inner cavity of the adjacent sliding groove (11).

8. A simulation device for training retinal laser photocoagulation according to claim 7, characterized in that: One side of the fixed seat (1201) is fixedly connected to one side of the adjacent sleeve (4), and a number of rubber anti-slip pads (1203) are fixedly connected to one side of the fixed seat (1201) and along the horizontal direction of the fixed seat (1201).

9. A simulation device for training retinal laser photocoagulation according to claim 1, characterized in that: A limiting mechanism (13) is provided below the sleeve (4). The limiting mechanism (13) includes a housing (1301). One side of the housing (1301) is fixedly connected to one end of the adjacent sleeve (4). A limiting rod (1302) is vertically provided in the inner cavity of the housing (1301). A baffle (1303) is sleeved on the outer ring of the limiting rod (1302). A return spring (1304) is sleeved on the outer ring of the limiting rod (1302). One end of the limiting rod (1302) passes through the side wall of the adjacent sleeve (4) and abuts against one side of the spring telescopic rod (5). The other end of the limiting rod (1302) passes through the side wall of the adjacent outer shell (1301) and is fixedly connected to a handle. One end of the return spring (1304) is fixedly connected to one side of the adjacent baffle (1303), and the other end of the return spring (1304) is fixedly connected to the inner wall of the adjacent outer shell (1301). The other side of the baffle (1303) abuts against one end of the adjacent sleeve (4).

10. A simulation device for training retinal laser photocoagulation according to claim 1, characterized in that: Sensing and communication modules are respectively installed in the inner cavity of the first hemisphere (101) and the inner cavity of the second hemisphere (102). The sensing and communication modules include a laser position detection unit, an operation duration recording unit, a microcontroller and a wireless communication unit. The output end of the laser position detection unit and the output end of the operation duration recording unit are respectively connected to the input interface of the corresponding microcontroller through signal lines. The output interface of the microcontroller is connected to the input end of the wireless communication unit through signal lines.

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