Method and apparatus for the creation and measurement of blunt ocular trauma

Abstract

The invention relates to the field of manufacturing and measuring blunt eye trauma, in particular to a method and device for manufacturing and measuring blunt eye trauma, comprising a height adjustment platform, an intraocular pressure feeding and measuring system, a high-speed camera system, a blunt injury manufacturing system, an eyeball embedding bracket, a display screen and a PC control terminal. The blunt injury manufacturing system drives a rotating part to rotate, a spherical impact hammer is fixed at the tail of a connecting rod of the rotating part, and after release, the connecting rod drives the spherical impact hammer to swing freely downward, so that the spherical impact hammer collides with an eyeball test sample in the eyeball embedding bracket at the lowest point to form a blunt eye trauma. The device of the invention can control the size of the initial impact energy, accurately calculate the energy value absorbed by the eyeball test sample in the device, and can reliably and sensitively study the biomechanical parameters of blunt eye trauma.

Description

Technical Field

[0001] The present invention relates to the technical field of blunt ocular trauma, and in particular to a method and device for manufacturing and measuring blunt ocular contusion. Background Art

[0002] The eye is one of the important organs of the human body for receiving external environmental information. The eye has a complex and fragile organizational structure, and even minor injuries can cause serious visual impairment or even blindness. Ocular trauma is divided into mechanical and non-mechanical types according to the cause of injury. Mechanical ocular trauma is common in daily life, so clinically, it is divided into three categories: contusion, penetrating injury, and foreign body injury. Compared with penetrating injuries caused by sharp objects, contusions often have greater energy, so the damage to the eyeball is more serious. Clinically, the prevalence of ocular contusion accounts for about 1 / 3 of ocular trauma. Different sites of ocular contusion usually cause anterior segment contusion, posterior segment contusion, and globe rupture. Ocular contusion often occurs in highly confrontational activities such as fights, ball games, falls, traffic accidents, and extreme sports. Some studies have shown that blunt ocular trauma can induce intraocular pressure and cause retinal damage. And it takes months or even years for retinal damage to progress to blindness. Therefore, studying blunt ocular trauma is of great significance for protecting human visual health.

[0003] Currently, the research on ocular trauma mainly focuses on finite element simulation and animal experiments. For example, Liu et al. added real trauma conditions to the finite element model through finite element simulation to simulate the internal environmental changes of the eyeball, so as to analyze the internal injury conditions of the eyeball. However, finite element simulation does not fully consider the impact process and impact state in the real environment. Therefore, a large number of research scholars have conducted animal experiment studies on blunt ocular trauma by adjusting different impact materials, impact energies, and test samples. Abroad, materials such as BB bullets, paintballs, impact hammers, aluminum blocks, foam blocks, and plastic blocks are used to adjust the impact energy of multiple hierarchical gradients to study the blunt injury of excised eyes by bluntly hitting the eyeball. For example, Sponsel et al. studied by creating ocular trauma conditions with paintballs.

[0004] In the prior art, the following problems exist:

[0005] (1) The above methods do not consider the shielding effect of the orbital structure during the impact process. In this impact method, the orbit will absorb a large amount of energy of the impact object, thereby reducing the energy actually absorbed by the eyeball and affecting the accuracy of the results.

[0006] (2) In daily life, the eyeball is mostly damaged by low-energy impacts. Traditional measurement methods usually use high-energy impacts such as gunshots and biological shock tubes, which cannot evaluate the damage of low-energy impacts to the eyeball, and the calculation of the initial kinetic energy is relatively vague, and precise impact at a specific energy cannot be achieved.

[0007] (3) Traditional research on eye injuries mainly focuses on the analysis of the structural damage of the eye tissue after injury. However, little is known about the biomechanical changes during the eye movement process, such as the absorbed energy, impact velocity, change in impact force, and change in intraocular pressure. Summary of the Invention

[0008] The purpose of the present invention is to provide a method and device for manufacturing and measuring blunt traumatic eye injuries to solve the problems raised in the above background technology.

[0009] The technical solution of the present invention is as follows:

[0010] A device for manufacturing and measuring blunt traumatic eye injuries, comprising:

[0011] A height adjustment platform (3), including a column, a support platform, and a support arm, wherein the support platform is used to fix the eyeball embedding bracket (6), and the test eyeball specimen is placed in the eyeball embedding bracket (6);

[0012] A blunt injury manufacturing system (2), including a moving slide (2001), a bracket (2007), a rotating member, a spherical impact hammer (2010), a servo motor (2006), and a force sensor (2009). The moving slide (2001) is slidably connected to the support arm of the height adjustment platform (3). The front end of the moving slide (2001) has a bracket (2007) which is rotatably connected to the transmission shaft (2004) of the rotating member. The tail of the connecting rod (2008) of the rotating member is fixedly connected to the spherical impact hammer (2010) through the force sensor. The servo motor (2006) drives the rotating member to rotate, so that the connecting rod (2008) drives the spherical impact hammer (2010) to be lifted. After the rotating member is released, the connecting rod (2008) swings freely downward, and the spherical impact hammer (2010) impacts the eyeball test sample in the eyeball embedding bracket (6) to form a blunt traumatic eye injury;

[0013] A high-speed imaging system (1), including a macro lens and a high-speed camera, which records the change in the shape of the eye tissue during the formation of the blunt traumatic eye injury and the movement process of the spherical impact hammer (2010).

[0014] Furthermore, it also has an intraocular pressure feeding and measuring system (5), including a hollow thin needle inserted into the eyeball, a propulsion device, and a pressure sensor. The propulsion device injects an intraocular adipose tissue simulation fluid into the eyeball through the hollow thin needle to adjust the initial intraocular pressure state, and the pressure sensor measures the change in intraocular pressure during the formation of the blunt eye injury.

[0015] Furthermore, the relational expression for controlling the initial impact energy by the rotation angle of the rotating member is:

[0016]

[0017] where α is the rotation angle of the rotating member, mv is the equivalent mass of the blunt injury manufacturing system, r v is the equivalent length of the blunt injury manufacturing system, g is the acceleration due to gravity, and E is the set initial impact energy value.

[0018] The energy absorbed by the eyeball test sample during the impact is:

[0019]

[0020] W is the energy absorbed by the eyeball test sample, v 1 is the speed of the spherical impact hammer contacting the front end of the cornea of the eyeball test sample recorded by the high-speed camera system (1), and v 2 is the speed when the spherical impact hammer leaves the front end of the cornea.

[0021] Furthermore, the high-speed camera system (1) has a macro photography function for photographing the deformation of eye tissues and the position change of the spherical impact hammer (2010), and also has a parallel light source for supplementary lighting. The eyeball test sample is embedded in a solidified gelatin solution, and the injected intraocular adipose tissue simulation fluid is triple-distilled water.

[0022] Furthermore, it also has a display and a PC control terminal (4). The PC control terminal (4) is used to operate and control the rotation angle of the rotating member and receive the intraocular pressure measurement data, force sensor data, and the recording data of the high-speed camera.

[0023] A method for manufacturing and measuring blunt ocular trauma uses the above-described device for manufacturing and measuring blunt ocular trauma based on biomechanical parameters, and includes the following steps:

[0024] S1: Fabricate the eyeball test sample: Prepare a 10% gelatin solution as the adipose tissue simulation fluid, inject it into the eyeball embedding bracket (6), maintain the liquid level at 1 / 2 of the eyeball embedding bracket (6) and place it in an environment of 4°C until the gelatin solution completely solidifies. Put the eyeball tissue after removing the surrounding muscle tissue and redundant nerves into the center of the eyeball embedding bracket, and continue to inject the gelatin solution into the eyeball embedding bracket (6) until the liquid level is flush with the upper surface of the eyeball embedding bracket, and then place it in an environment of 4°C again until the gelatin completely solidifies;

[0025] S2: Install the eyeball bracket and set the device parameters: Fasten the eyeball embedding bracket (6) to the support platform of the height adjustment platform (3) with bolts. Set the connecting rod length of the blunt injury manufacturing system according to the required impact energy amplitude. Adjust the moving slide and the support arm so that the spherical impact hammer just touches the front end of the cornea of the eyeball tissue at the lowest point of the downward swing. Calculate the required rotation angle value of the blunt injury manufacturing system according to the specified initial impact energy value; Horizontally install the high-speed camera to align with the eyeball bracket, and focus and supplement the light for the macro lens;

[0026] S3: Adjust intraocular pressure: Push triple-distilled water into the interior of the eyeball by adjusting the propulsion device so that the initial intraocular pressure is between 1.8 and 2.5 kPa. Close the pressure regulating valve to ensure intraocular balance and measure the intraocular pressure value in real time;

[0027] S4: Create blunt ocular trauma: Start the servo motor to drive the spherical impact hammer to rotate to a set angle and then drop and impact. Record and analyze the measurement data of blunt ocular trauma under this initial impact energy received by the PC control terminal.

[0028] The present invention provides an improved method and device for creating and measuring blunt ocular trauma herein. Compared with the prior art, the following improvements and advantages are achieved:

[0029] First: The method and device used in the present invention can achieve direct impact of the spherical impact hammer on the surface of the cornea of the eye, and avoid mechanical occlusion caused by the orbital structure during the impact process, transferring the impact energy completely to the surface of the eyeball. In addition, this device uses embedding to fix the eye tissue on the eyeball embedding bracket, and uses gelatin to simulate the buffering effect of the extraocular muscles on external impacts, well restoring the real stress environment when the eyeball is impacted and being able to obtain test results close to the actual situation;

[0030] Second: The blunt ocular trauma creating and measuring system provided by the present invention can meet the settings of different maximum initial impact energy levels, i.e., impact energy amplitudes, by adjusting the length of the connecting rod; control the rotation angle through the servo motor to achieve the manufacturing requirements of the impact damage of the eye tissue by different initial impact energy magnitudes after the impact energy amplitude is determined, and calculate the speed magnitude under the condition of a specified initial impact energy according to the formula, being able to quantitatively adjust and control the formation of blunt ocular trauma, calculate the actual absorbed energy, and being of great significance for revealing the mechanism of eye trauma formation research;

[0031] Third: By the lateral movement of the short shaft fixed between the bearings, the present invention can adjust the lateral movement of the connecting rod, the force sensor and the spherical impact hammer, realizing the adjustment of the specific impact position of the spherical impact hammer, enabling the device to meet the requirements of various impact positions and being able to accurately restore the situation of blunt ocular trauma at a specific position under real conditions;

[0032] Fourth, by collecting multiple biomechanical parameters such as impact speed, impact force, intraocular pressure and energy absorbed by the eye tissue, the present invention realizes the changes of various biomechanical parameters during the occurrence of blunt ocular trauma, provides the time response of impact speed, impact force and intraocular pressure under dynamic conditions, and can sensitively and accurately obtain the parameters of the energy actually absorbed by the eyeball tissue during impact and the damage caused;

[0033] Fifthly, the measurement method of the present invention overcomes a series of difficulties in realizing the manufacture and measurement of simulated in-vivo eye tissues under different degrees of blunt ocular trauma, truly realizes the precise and adjustable control of the manufacture of blunt ocular trauma, and can obtain the time responses of initial impact energy, impact velocity, intraocular pressure, absorbed energy, and impact force parameters, providing a reliable and sensitive device and method for the in-vitro study of blunt ocular trauma. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further explained below with reference to the drawings and embodiments:

[0035] Figure 1 is a schematic diagram of the measurement device of the present invention;

[0036] Figure 2 is a schematic diagram of the structure of the blunt ocular trauma manufacturing and measurement system of the present invention.

[0037] Description of reference numerals: 1, high-speed imaging system; 2, blunt injury manufacturing system; 3, height adjustment platform; 4, display and PC control terminal; 5, intraocular pressure measurement system; 6, eyeball embedding bracket; 2001, sliding platform; 2002, absolute grating encoder; 2003, bearing; 2004, transmission shaft; 2005, shaft clutch; 2006, servo motor; 2007, platform bracket; 2008, connecting rod; 2009, force sensor; 2010, spherical impact hammer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The present invention will be described in detail below. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] The present invention provides a method and device for manufacturing and measuring blunt ocular trauma by improvement. The technical solution of the present invention is:

[0040] As Figure 1 — Figure 2 shown, the device for manufacturing and measuring blunt ocular trauma includes a high-speed imaging system 1, a blunt injury manufacturing system 2, a height adjustment platform 3, a display and PC control terminal 4, an intraocular pressure measurement system 5, and an eyeball embedding bracket 6. The height adjustment platform 3 is composed of a column, a support platform, and an arm perpendicular to the column, and is used to support the test structure. The arm can be adjusted and fixed in the up and down directions of the column; the blunt injury manufacturing system 2 is fixed on the arm, and the eyeball embedding bracket 6 is arranged on the support platform below the arm and is connected to the intraocular pressure measurement system 5.

[0041] The blunt impact injury manufacturing system 2 includes a moving slide table 2001, an absolute grating encoder 2002, bearings 2003, a transmission shaft 2004, a shaft clutch 2005, a servo motor 2006, a platform support 2007, a rotating member, a connecting rod 2008, a force sensor 2009, and a spherical impact hammer 2010, which is used to generate an eyeball impact action under a certain initial energy. The moving slide table 2001 is arranged above the arm of the height adjustment platform 3 and can be adjusted back and forth. The front end of the slide table has a support 2007. The rotating member is integrally T-shaped and consists of a transverse transmission shaft 2004 and a longitudinal connecting rod 2008. The transmission shaft 2004 is rotatably connected to the support 2007 through a bearing 2003. The servo motor 2006 is connected to the rotating shaft 2003 through a shaft clutch 2005 to drive the rotation of the rotating shaft 2003. The absolute grating encoder 2002 is arranged on one side of the transmission shaft 2004 to obtain the rotation angle. The tail end of the connecting rod 2008 is threadedly connected to the spherical impact hammer 2010 through a force sensor 2009. The length of the connecting rod 2008 is adjustable. Preferably, the side of the tail of the connecting rod 2008 has a convex connection to the spherical impact hammer to prevent the swing rod from hitting the eye socket and damaging the energy. Before the test, by adjusting the moving slide table 2001 and the arm of the height adjustment platform, the precise position of the spherical impact hammer hitting at the lowest point of the swing when it hangs naturally is adjusted, so that the front end of the spherical impact hammer just touches the position of the corneal protrusion at the lowest point, so that all potential energy is converted into kinetic energy when the spherical impact hammer moves to the lowest end, and the eye tissue completely absorbs the impact energy when being impacted. When the device works, the servo motor 2006 drives the transmission shaft 2004 to rotate a certain angle to the initial position. At this time, the spherical impact hammer is lifted and has initial energy. Then the shaft clutch is released, and the connecting rod 2008 drives the spherical impact hammer to swing freely downward together. The spherical impact hammer collides with the surface of the eyeball, and the relevant parameters of the eye injury formed by a blunt impact with a specified initial energy are measured, and the angular change of the absolute grating encoder during the falling process is obtained to realize the angular velocity acquisition work. In addition, by adjusting the length of the connecting rod of the blunt impact injury manufacturing system to meet the preset impact energy amplitude, the initial impact energy value of the blunt impact injury manufacturing system can be adjusted by controlling the servo motor to rotate a specified angle.

[0042] The high-speed imaging system 1 is arranged facing the eyeball embedding bracket 6 to record the impact process. Preferably, the high-speed imaging system 1 has a macro imaging function to record the movement speed of the spherical impact hammer and the changes in the surface structure of the eye tissue such as speckles on the surface of the vitreous body during the impact process. At the same time, an external parallel light source is used for supplementary lighting, and the aperture and focal length of the lens are adjusted to ensure a clear and bright field of view. Further, a 100mm macro lens (TOKINA.Inc, Japan) is used, the high-speed camera can use i-speed3 (OLYMPUS, UK), and the parallel light source uses GRIP181—FP180 (bescor, USA).

[0043] Specifically, the spherical impact hammer 2010 uses a rigid small ball with a standard diameter of 20 mm. The shape of the spherical impact hammer is basically the same as that of the eyeball, so that the spherical impact hammer can directly collide with the surface of the eyeball and reduce the influence of the eyeball embedding bracket 6.

[0044] Specifically, the intraocular pressure acquisition system 5 includes a hollow thin needle, a pressure sensor and a propulsion device. The hollow thin needle uses a thin-walled hollow thin needle with a diameter of 2.5 mm, and the pressure sensor uses a micro pressure transmitter. The thin-walled hollow thin needle and the micro pressure transmitter are hermetically connected through a rubber tube. The intraocular pressure acquisition system 5 can adjust the initial intraocular pressure level to restore it close to the physiological state and measure and acquire the intraocular pressure data in real time. The sampling frequency of the micro pressure transmitter is ≥50 kHz, the applicable range is -0.1 to 0.9 Mpa, and the sampling accuracy is 0.5%. In this embodiment, all devices connected through the rubber tube need to exhaust air and be filled with triple-distilled water. The rubber tube should be as short as possible and not easily deformed, so as to reduce the influence of the whole device on the intraocular pressure and ensure the accuracy of the device. The acquired intraocular pressure data is converted from analog to digital through a pressure sensor acquisition card, and a digital signal is obtained and transmitted to the PC control terminal. The hollow thin needle enters the embedded bracket along the tail end of the eyeball embedding bracket and inserts into the eyeball along the optic papilla of the eye tissue. By adjusting the propulsion device, the triple-distilled water of the intraocular vitreous tissue simulation fluid is filled into the vitreous body to adjust the initial intraocular pressure value. Preferably, the model of the micro pressure transmitter can be CJGR-15 (Xi'an Chuanghe Electronic Technology Co., Ltd., China), and the pressure sensor acquisition card can be of the DT9837B model. The device of the present invention also has a PC control terminal 4 and a display. The PC control terminal 4 is composed of a notebook computer, a servo motor controller, a force sensor acquisition card (DT9837B), and a pressure sensor acquisition card (DT9837B). Among them, the data collected by the pressure sensor, the force sensor and the high-speed camera are sorted out and transmitted to the PC control terminal 4. The servo motor controller controls the initial angle, rotation speed and angular frequency of the impact hammer in the blunt injury manufacturing system 2. The data acquisition module of the PC control terminal 4 can use MATLAB and i-speed suit software

[0045] In one embodiment, the servo motor 2005 is a MAXON MOTOR servo motor produced in Switzerland, and its model is 469291. The force sensor 2009 is a piezoelectric force sensor (1051V3) produced by DYTRAN Inc in the United States to collect the mechanical data during the impact of the small ball, and the signal is collected through a force sensor acquisition card (DT9837B) and transmitted to the PC control terminal.

[0046] The principle of the device of the present invention to accurately control the initial impact energy is as follows:

[0047] When implementing blunt ocular trauma, the following formula is satisfied:

[0048]

[0049] Among them, m is the structural mass of each part of the blunt impact injury manufacturing system, h is the structural length of each part of the blunt impact injury manufacturing system, and λ is the linear density value of the material of each structure. Substituting the linear density result into the formula for calculating the moment of inertia, the rotation center corresponding to the rotation center of the connecting rod and the formula for calculating the moment of inertia are as follows:

[0050]

[0051] Among them, l is the vertical height between the centroid of each structure and the rotation center in the natural hanging state, x is the position coordinate of the surface element d m , k is the equivalent value of the moment of inertia of the corresponding rod-shaped structure. Calculate the moment of inertia of each structure of the blunt impact injury manufacturing system, and derive the equivalent mass of the entire system. According to the equivalent potential energy at any moment, the formula for calculating the impact angle corresponding to different initial impact energies is as follows:

[0052]

[0053] Among them, m v is the equivalent mass of the blunt impact injury manufacturing system, r v is the equivalent length of the blunt impact injury manufacturing system, g is the acceleration due to gravity, and E is the set initial impact energy value. It can be seen that by setting different rotation angles, blunt impact eye injuries with different impact energies can be manufactured. For example, when the length of the connecting rod is 600 mm, the corresponding relationship between the impact energy and the rotation angle is as follows: when the initial impact energy is 0.125 J, the rotation angle is 27.6°; when the initial impact energy is 0.25 J, the rotation angle is 39.44°; when the initial impact energy is 0.5 J, the rotation angle is 57.01°; when the initial impact energy is 1 J, the rotation angle is 84.98°. After raising the connecting rod according to the preset rotation angle and then releasing it, record the experimental data such as intraocular pressure, impact speed, and impact force during the entire impact process. The formula for calculating the energy absorption is as follows:

[0054]

[0055] W is the energy absorbed by the eye test sample, and it is also the part of the kinetic energy loss during the process of the spherical impact hammer contacting and leaving the front end of the cornea. v 1 is the speed of the spherical impact hammer contacting the front end of the cornea of the eye test sample recorded by the high-speed imaging system (1), v 2is the velocity of the spherical impact hammer when it leaves the front end of the cornea. According to the change in transient velocity before and after the impact, the change in energy is calculated, that is, the energy absorbed by the eye tissue and its structure during the impact process, so as to evaluate the amount of energy absorbed by the eye tissue in an experiment with a certain initial impact energy. By analyzing the eye injury models with different impact energies, the mechanical influence of the impact energy absorbed by the eye tissue on eye tissue injury is evaluated, and further the eye injury situation under the condition of multiple biomechanical parameters is analyzed.

[0056] In this device, the length of the connecting rod determines the maximum height difference at the highest point that the spherical impact hammer can be lifted. According to the law of conservation of energy, it also determines the maximum energy level of the impact energy, that is, the length of the connecting rod determines the impact energy amplitude level of the entire blunt impact system. This device can achieve the formation of blunt eye trauma under specific impact energies by setting the length of the connecting rod and the rotation angle, controlling the experimental conditions for manufacturing eye trauma, which is of great significance in the quantitative study of the biomechanical characteristics of eye trauma.

[0057] The specific method for measuring the mechanical properties of the vitreous body using the device of the present invention includes the following steps:

[0058] S1: Fabricate the test sample: Prepare a 10% gelatin solution as the adipose tissue simulation fluid, inject it into the eyeball embedding bracket using a syringe, maintain the liquid level at half of the eyeball embedding bracket and place it in an environment of 4°C until the gelatin solution completely solidifies and then take it out. Put the eyeball tissue after removing the surrounding muscle tissue and redundant nerves into the center of the eyeball embedding bracket, inject the gelatin solution into the eyeball embedding bracket using a syringe until the liquid level is flush with the upper surface of the eyeball embedding bracket and place it in an environment of 4°C for 1 hour, and then take it out after the gelatin completely solidifies;

[0059] S2: Install the eyeball bracket and set the device parameters: Fasten the eyeball embedding bracket to the support platform of the height adjustment platform 3 through bolts, set the length of the connecting rod of the blunt injury manufacturing system according to the impact energy amplitude, adjust the front end of the cornea of the eyeball tissue of the support arm to just contact the spherical impact hammer, and calculate the required rotation angle value of the blunt injury manufacturing system according to the specified initial impact energy value. Horizontally install the high-speed camera to aim at the eyeball bracket, and focus and supplement light for the macro lens to ensure that the shooting field of view is clear and bright;

[0060] S3: Adjust the initial intraocular pressure: Push triple-distilled water into the eyeball through the adjustment device to make the initial intraocular pressure between 1.8 and 2.5 kPa, close the pressure regulating valve to ensure intraocular balance, and measure the intraocular pressure value in real time;

[0061] S4: Form blunt eye trauma by blunt impact: Start the servo motor to drive the spherical impact hammer to rotate to the set angle and fall to impact, record and analyze the measurement data of blunt eye trauma under this impact energy received by the PC control terminal.

[0062] The foregoing description enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Device for manufacturing and measuring blunt ocular trauma, characterized in that, it includes: Height adjustment platform (3), including a column, a support platform and a support arm, wherein the support platform is used to fix the eyeball embedding bracket (6), and the test eyeball specimen is placed in the eyeball embedding bracket (6); Blunt injury manufacturing system (2), including a moving slide (2001), a bracket (2007), a rotating member, a spherical impact hammer (2010), a servo motor (2006), and a force sensor (2009). The moving slide (2001) is slidably connected to the support arm of the height adjustment platform (3). The front end of the moving slide (2001) has a bracket (2007), which is rotatably connected to the transmission shaft (2004) of the rotating member. The tail of the connecting rod (2008) of the rotating member is fixedly connected to the spherical impact hammer (2010) through the force sensor. The servo motor (2006) drives the rotating member to rotate, so that the connecting rod (2008) drives the spherical impact hammer (2010) to lift. After the rotating member is released, the connecting rod (2008) swings freely downward, and the spherical impact hammer (2010) impacts the eyeball test sample in the eyeball embedding bracket (6) to form blunt ocular trauma; High-speed imaging system (1), including a macro lens and a high-speed camera, which records the changes in the shape of the eye tissue during the formation of blunt ocular trauma and the movement process of the spherical impact hammer (2010); Intraocular pressure feeding and measuring system (5), including a fine hollow needle inserted into the eyeball, a propulsion device and a pressure sensor. The propulsion device injects an intraocular adipose tissue simulation fluid into the eyeball through the fine hollow needle to adjust the initial intraocular pressure state, and the pressure sensor measures the changes in intraocular pressure during the formation of blunt ocular trauma.

2. The device for manufacturing and measuring blunt ocular trauma according to claim 1, characterized in that: The relational expression for controlling the initial impact energy by the rotation angle of the rotating member is: where α is the rotation angle of the rotating part, m v is the equivalent mass of the blunt injury manufacturing system, r v is the equivalent length of the blunt injury manufacturing system, g is the acceleration due to gravity, and E is the set initial impact energy value.

3. The device for manufacturing and measuring blunt ocular trauma according to claim 2, characterized in that: The amount of energy absorbed by the eyeball test sample during the impact is: W is the energy absorbed by the eye test sample, v 1 is the velocity of the spherical impact hammer contacting the front end of the cornea of the eye test sample recorded by the high-speed imaging system (1), v 2 is the velocity of the spherical impact hammer when it leaves the front end of the cornea.

4. The device for manufacturing and measuring blunt ocular trauma according to claim 3, characterized in that: The high-speed imaging system (1) has a macro imaging function, which is used to photograph the deformation of the eye tissue and the position change of the spherical impact hammer (2010), and also has a parallel light source for supplementary lighting.

5. The device for manufacturing and measuring blunt ocular trauma according to claim 4, characterized in that: The eyeball test sample is embedded in a solidified gelatin solution, and the injected intraocular adipose tissue simulation fluid is triple-distilled water.

6. The device for manufacturing and measuring blunt ocular trauma according to claim 5, characterized in that: It also has a display and a PC control terminal (4). The PC control terminal (4) is used to operate and control the rotation angle of the rotating member and receive the intraocular pressure measurement data, the force sensor data and the recording data of the high-speed camera.

7. Method for manufacturing and measuring blunt ocular trauma, including the device for manufacturing and measuring blunt ocular trauma according to any one of claims 1-6, characterized in that, the measurement method comprises the following steps: S1: Fabricate an eyeball test sample: Prepare a 10% gelatin solution as a fat tissue simulation fluid, inject it into the eyeball embedding bracket (6), maintain the liquid level at half of the eyeball embedding bracket (6), and place it in an environment at 4°C until the gelatin solution completely solidifies. Place the eyeball tissue after removing the surrounding muscle tissue and excess nerves in the center of the eyeball embedding bracket, and continue to inject the gelatin solution into the eyeball embedding bracket (6) until the liquid level is flush with the upper surface of the eyeball embedding bracket, and then place it in an environment at 4°C again until the gelatin completely solidifies; S2: Install the eyeball bracket and set the device parameters: Fasten the eyeball embedding bracket (6) to the support platform of the height adjustment platform (3) through bolts, set the connecting rod length of the blunt injury manufacturing system according to the required impact energy amplitude, adjust the moving slide and the support arm so that the spherical impact hammer just touches the front end of the cornea of the eyeball tissue at the lowest point of the downward swing, and calculate the required rotation angle value of the blunt injury manufacturing system according to the specified initial impact energy value; Horizontally install the high-speed camera to align with the eyeball bracket, and focus and supplement light for the macro lens; S3: Adjust the intraocular pressure: Push triple-distilled water into the eyeball through the adjustment device to make the initial intraocular pressure between 1.8 and 2.5 kPa, close the pressure regulating valve to ensure intraocular balance, and measure the intraocular pressure value in real time; S4: Manufacture blunt ocular trauma: Start the servo motor to drive the spherical impact hammer to rotate to the set angle and fall to strike, and record and analyze the measurement data of blunt ocular trauma at this initial impact energy received by the PC control terminal.

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