Intraocular pressure measuring device and measuring method

Abstract

The invention relates to the field of medical health, and aims to provide an intraocular pressure measuring device and a measuring method so as to reduce the operation difficulty of a user and improve the measuring accuracy. According to the technical scheme, the intraocular pressure measuring device is characterized by comprising a telescope barrel with an eyeshade, a springback type pressure measuring module arranged in the telescope barrel, a position adjusting module connected with the telescope barrel and the springback type pressure measuring module, and a controller electrically connected with the position adjusting module and the springback type pressure measuring module.

Description

Technical Field

[0001] The present invention relates to the field of medical health, and in particular to an intraocular pressure measuring device and a measuring method. Background Art

[0002] Glaucoma is a serious eye disease that damages the optic nerve. Although there's currently no cure, early detection and effective management can slow its progression. Worryingly, less than half of people with glaucoma are aware they have the disease. This is primarily because glaucoma often has no obvious symptoms in its early stages. Many people don't realize they have glaucoma until they experience significant vision loss, or even when they're on the verge of blindness.

[0003] Untreated glaucoma can cause irreversible damage to the optic nerve, leading to a gradual reduction in visual field and ultimately, complete blindness. The disease impairs vision gradually, usually starting in the peripheral vision, with patients often not noticing the problem until their central vision is affected. Because glaucoma's symptoms are not obvious, many patients miss the opportunity for early diagnosis and treatment. Glaucoma is also hereditary, meaning that if one family member has glaucoma, other family members may also be at increased risk. This makes family history an important factor in glaucoma screening.

[0004] Lowering intraocular pressure (IOP) is currently the only effective treatment for glaucoma. Whether through medication, laser therapy, or surgery, the goal is to slow the damage to the optic nerve caused by elevated IOP. However, IOP is not a fixed value; it fluctuates with time of day, activity, diet, and other factors. IOP can fluctuate significantly during the day and night, meaning a single measurement does not fully reflect a patient's IOP status.

[0005] Therefore, regular monitoring of intraocular pressure is crucial for glaucoma patients. This not only helps doctors assess the effectiveness of treatment, but also helps patients and doctors adjust treatment plans in a timely manner to achieve the best therapeutic effect. The emergence of portable devices such as handheld tonometers allows patients to monitor their intraocular pressure conveniently at home, providing more frequent and comprehensive data for better disease management.

[0006] In daily life, self-monitoring of intraocular pressure is crucial for many patients with ophthalmic diseases, especially for those with glaucoma. However, traditional handheld tonometers, although they have advantages in portability and ease of operation, face many challenges in actual use. First, these devices often require users to have certain operating skills to ensure the accuracy of the measurement. Secondly, due to the complex structure of the eye, it is difficult for users to accurately align the measuring point of the tonometer when self-measuring, which not only increases the difficulty of operation, but may also lead to errors in the measurement results. In addition, the operation process of the handheld tonometer is often complicated, requiring the user to maintain a stable posture during the measurement process, which is undoubtedly a major challenge for the elderly or patients with inconvenient hand movements. Summary of the Invention

[0007] The purpose of the present invention is to overcome the deficiencies in the above-mentioned background technology and provide an intraocular pressure measuring device and a measuring method to reduce the user's operating difficulty and improve the measurement accuracy.

[0008] The technical solution of the present invention is:

[0009] An intraocular pressure measuring device is characterized by comprising a telescope barrel with an eye mask, a rebound pressure measuring module arranged in the telescope barrel, a position adjustment module connecting the telescope barrel and the rebound pressure measuring module, and a controller electrically connecting the position adjustment module and the rebound pressure measuring module.

[0010] The rebound pressure measuring module includes a guide member, a probe axially slidably positioned on the guide member, and a recovery coil and a transmitting coil respectively arranged at the front and rear ends of the guide member.

[0011] An optical fixation module is also provided in the inner bracket; the optical fixation module includes a CCD camera arranged behind the guide member, a spectrometer arranged between the guide member and the CCD camera, a convex lens arranged in the middle of the guide member, and an indicator light arranged below the spectrometer; the guide member, CCD camera, spectrometer, and convex lens are coaxially arranged.

[0012] The position adjustment module includes an outer bracket fixed to the inner wall of the telescope barrel, an inner bracket arranged in the outer bracket, and eight memory alloy wire motors connecting the outer bracket and the inner bracket in a diagonal cross manner.

[0013] The memory alloy wire motor is respectively connected to the front upper left and right sides, the front lower left and right sides, the rear upper left and right sides, and the rear lower left and right sides of the outer bracket and the inner bracket; the rebound pressure measuring module is fixed in the inner bracket.

[0014] The position adjustment module includes an inner bracket axially slidably positioned in the telescope barrel and four memory alloy wire motors arranged parallel to the sliding direction of the inner bracket and connecting the telescope barrel and the inner bracket.

[0015] The position adjustment module includes an inner bracket that can be axially slidably positioned in the telescope barrel, a seal arranged between the telescope barrel and the inner bracket, a position adjustment cavity surrounded by the seal, the inner wall of the telescope barrel and the outer wall of the inner bracket, and an air pump connected to the position adjustment cavity.

[0016] A method for measuring intraocular pressure, comprising the following steps:

[0017] Step 1: The user places the device in front of their eyes and fits the eye mask tightly to the area around their eyes, preparing for subsequent automated measurement.

[0018] Step 2: The indicator light turns on to guide the user to look forward and ensure that the eye's line of sight is fixed;

[0019] Step 3: The CCD camera captures the eye image and obtains the center position of the cornea. The position adjustment module adjusts the position of the rebound pressure measurement module so that the central axis of the guide is close to the center of the cornea. The rebound pressure measurement module starts and drives the probe to bounce gently and quickly toward the cornea to find the center of the cornea.

[0020] (1) Establish a pressure measurement coordinate system. The position adjustment module drives the rebound pressure measurement module to move along the X-axis of the pressure measurement coordinate system. At the same time, the rebound pressure measurement module impacts multiple measurement points. When the probe extension length of a certain measurement point is less than the probe extension length of the measurement points on both sides, the measurement point is used as the X-axis measurement coordinate. The position adjustment module drives the rebound pressure measurement module to move to the X-axis measurement coordinate.

[0021] (2) With the X-axis measurement coordinate as a reference, the position adjustment module drives the rebound pressure measurement module to move in a direction parallel to the Y-axis of the pressure measurement coordinate system. At the same time, the rebound pressure measurement module impacts multiple measurement points. When the probe extension length of a certain measurement point is less than the probe extension length of the measurement points on both sides, the measurement point is used as the Y-axis measurement coordinate, and the position adjustment module drives the rebound pressure measurement module to move to the Y-axis measurement coordinate;

[0022] Step 4: Using the X-axis and Y-axis measurement coordinates as a reference, the CCD camera captures an image of the eyeball and obtains the axial distance between the eyeball and the probe. The position adjustment module adjusts the axial distance between the rebound pressure measurement module and the eyeball. The rebound pressure measurement module is activated, driving the probe to be ejected gently and at high speed toward the cornea. Based on the motion parameters of the probe, the intraocular pressure is calculated in real time.

[0023] Step 5: End the measurement and move the device away from the user.

[0024] In step S3, the spacing between the measuring points on the X axis is 1 mm, and the spacing between the measuring points on the Y axis is 1 mm.

[0025] A method for measuring intraocular pressure, comprising the following steps:

[0026] Step 1: The user places the device in front of their eyes and fits the eye mask tightly to the area around their eyes, preparing for subsequent automated measurement.

[0027] Step 2: The indicator light turns on to guide the user to look forward and ensure that the eye's line of sight is fixed;

[0028] Step 3: The CCD camera captures an image of the eyeball and obtains the axial distance between the eyeball and the probe. The position adjustment module adjusts the axial distance between the rebound pressure measurement module and the eyeball. The rebound pressure measurement module is activated, driving the probe to be ejected gently and at high speed toward the cornea. The intraocular pressure is calculated in real time based on the motion parameters of the probe.

[0029] Step 4: End the measurement and move the device away from the user.

[0030] The beneficial effects of the present invention are:

[0031] 1. The present invention adopts a telescopic structure, which can guide the user to look forward when measuring intraocular pressure. It is simple and convenient to operate, avoiding the problem that users are afraid to open their eyes when using traditional tonometers;

[0032] 2. The present invention uses a rebound-type pressure measurement module to measure intraocular pressure. The probe is launched forward under the action of magnetic force and hits the center of the cornea of the eyeball. By measuring the motion parameters of the probe, the intraocular pressure data can be accurately obtained, which greatly improves the measurement accuracy;

[0033] 3. The present invention adopts a position adjustment module to adjust the position of the rebound-type rebound pressure measuring module. The position adjustment module includes several memory alloy wire motors. The expansion and contraction of the memory alloy wire motors can ensure that the probe accurately hits the center of the cornea of the eyeball, which not only reduces the difficulty of user operation, but also improves the measurement accuracy, effectively solving the problem of users measuring intraocular pressure by themselves. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the three-dimensional structure of Example 1 of the present invention.

[0035] Figure 2 It is a schematic diagram of the main structure of Example 1 of the present invention.

[0036] Figure 3 This is one of the cross-sectional structural diagrams of Example 1 of the present invention.

[0037] Figure 4 This is the second cross-sectional structural diagram of Example 1 of the present invention.

[0038] Figure 5 It is a left-view structural schematic diagram of Example 1 of the present invention.

[0039] Figure 6 It is a schematic diagram of the three-dimensional structure of the position adjustment module of Example 1 of the present invention.

[0040] Figure 7 It is a schematic cross-sectional structural diagram of the inner bracket and the rebound type pressure measuring module of Example 1 of the present invention.

[0041] Figure 8 It is a schematic diagram of the three-dimensional structure of the rebound pressure measuring module of Example 1 of the present invention.

[0042] Figure 9 This is one of the schematic diagrams of the intraocular pressure measurement method of the present invention.

[0043] Figure 10 This is the second schematic diagram of the intraocular pressure measurement method of the present invention.

[0044] Figure 11 This is the third schematic diagram of the intraocular pressure measurement method of the present invention.

[0045] Figure 12 This is the fourth schematic diagram of the intraocular pressure measurement method of the present invention.

[0046] Figure 13 This is the fifth schematic diagram of the intraocular pressure measurement method of the present invention.

[0047] Figure 14 It is a structural diagram of a position adjustment module according to embodiment 2 of the present invention.

[0048] Figure 15 It is a structural diagram of a position adjustment module according to embodiment 3 of the present invention.

[0049] Reference numerals:

[0050] Telescope barrel 1, eye mask 1-1, guide 3-1, probe 3-2, transmitting coil 3-3, recovery coil 3-4, camera 3-5, spectrometer 3-6, convex lens 3-7, indicator light 3-8, memory alloy wire motor 4, first memory alloy wire motor 4-1, second memory alloy wire motor 4-2, third memory alloy wire motor 4-3, fourth memory alloy wire motor 4-4, fifth memory alloy wire motor 4-5, sixth memory alloy wire motor 4-6, seventh memory alloy wire motor 4-7, eighth memory alloy wire motor 4-8, outer bracket 4-9, inner bracket 4-10, connector 4-11, slide groove 4-12, seal 4-13, position adjustment cavity 4-14, eyeball 9. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0052] Example 1

[0053] like Figure 1 As shown, an intraocular pressure measuring device includes a telescope barrel 1, a position adjustment module, a rebound pressure measurement module, an optical fixation module, and a controller.

[0054] The telescope body is cylindrical, with finger-friendly textures on its outer wall, making it easy for the user to hold the device. An eye mask 1-1 is located at the front of the telescope body. Made of a flexible material, it adheres closely to and covers the skin around the user's eye sockets, limiting the range of eye placement during measurement and ensuring the rebound pressure measurement module is aligned with the eyeball, thereby improving measurement accuracy.

[0055] The rebound type pressure measuring module is arranged inside the telescope barrel, and the telescope barrel and the rebound type pressure measuring module are connected via a position adjustment module.

[0056] The rebound pressure measurement module uses a rebound method to test intraocular pressure: a probe is first inserted into the eyeball, where it rebounds after impact. The motion parameters of the probe are then measured to calculate intraocular pressure. The position adjustment module is used to adjust the position of the rebound pressure measurement module to improve measurement accuracy. The controller (omitted in the figure) electrically connects the position adjustment module and the rebound pressure measurement module.

[0057] The position adjustment module includes eight memory alloy wire motors connecting the telescope barrel and the rebound pressure measurement module. Figure 6 As shown, the position adjustment module includes: a first memory alloy wire motor 4-1, a second memory alloy wire motor 4-2, a third memory alloy wire motor 4-3, a fourth memory alloy wire motor 4-4, a fifth memory alloy wire motor 4-5, a sixth memory alloy wire motor 4-6, a seventh memory alloy wire motor 4-7, an eighth memory alloy wire motor 4-8, an outer bracket 4-9 and an inner bracket 4-10.

[0058] The outer and inner brackets are rectangular parallelepiped frames. The outer bracket is fixed to the inner wall of the telescope barrel, while the inner bracket is positioned within the outer bracket. The rebound pressure measurement module is fixed within the inner bracket. The outer and inner brackets are connected by eight memory alloy wire motors. Connectors 4-11 are provided on both the outer and inner brackets for securing the ends of the memory alloy wire motors.

[0059] These eight memory alloy wire motors connect the outer bracket and the inner bracket in a diagonal cross manner.

[0060] The first memory alloy wire motor and the second memory alloy wire motor are arranged crosswise and connected to the left and right sides of the front upper part of the outer bracket and the inner bracket ( Figure 3 The upper left portion of the front portion of the outer bracket is connected to the upper left portion of the front portion of the inner bracket, and the upper right portion of the front portion of the inner bracket is connected to the upper left portion of the front portion of the outer bracket. Figure 3 The left side is the front part of the outer bracket and the inner bracket. Figure 3 The right side is the rear part of the outer bracket and the inner bracket. Figure 5 The right side is the outer bracket and the left side of the inner bracket. Figure 5 The left side is the outer bracket and the right side of the inner bracket.

[0061] The third memory alloy wire motor and the fourth memory alloy wire motor are arranged crosswise and connected to the left and right sides of the front lower portion of the outer bracket and the inner bracket ( Figure 3 The lower left portion of the front portion of the outer bracket is connected to the lower left portion of the front portion of the inner bracket, and the lower right portion of the front portion of the inner bracket is connected to the lower right portion of the front portion of the outer bracket.

[0062] The fifth memory alloy wire motor and the sixth memory alloy wire motor are arranged crosswise and connected to the left and right sides of the upper rear portion of the outer bracket and the inner bracket ( Figure 3 The fifth memory alloy wire motor connects the upper left of the rear of the outer bracket and the upper right of the rear of the inner bracket, and the sixth memory alloy wire motor connects the upper right of the rear of the outer bracket and the upper left of the rear of the inner bracket.

[0063] The seventh memory alloy wire motor and the eighth memory alloy wire motor are arranged crosswise and connected to the left and right sides of the rear lower portion of the outer bracket and the inner bracket ( Figure 3 The seventh memory alloy wire motor is connected to the lower left of the rear of the outer bracket and the lower right of the rear of the inner bracket, and the eighth memory alloy wire motor is connected to the lower right of the rear of the outer bracket and the lower left of the rear of the inner bracket.

[0064] When the memory alloy wire motor is energized, it contracts. Part of the memory alloy wire motor can be energized to drive the rebound pressure measurement module to move in a specified direction, so that the probe can accurately hit the center of the eyeball during pressure measurement. Figure 3 The horizontal direction and Figure 5 horizontal and vertical directions.

[0065] When the rebound load cell needs to move forward ( Figure 3 On the left side), the first memory alloy wire motor, the second memory alloy wire motor, the third memory alloy wire motor, and the fourth memory alloy wire motor increase the current at the same time (the other memory alloy wire motors reduce the current); when the rebound pressure measuring module needs to move backward ( Figure 3On the right side), the fifth memory alloy wire motor, the sixth memory alloy wire motor, the seventh memory alloy wire motor, and the eighth memory alloy wire motor increase the current at the same time (the other memory alloy wire motors reduce the current).

[0066] When the rebound load cell needs to move to the left ( Figure 5 On the right side of the motor), the first memory alloy wire motor, the third memory alloy wire motor, the fifth memory alloy wire motor, and the seventh memory alloy wire motor increase the current at the same time (the other memory alloy wire motors reduce the current); when the rebound pressure measuring module needs to move to the right ( Figure 5 On the left side), the second memory alloy wire motor, the fourth memory alloy wire motor, the sixth memory alloy wire motor, and the eighth memory alloy wire motor increase the current at the same time (the other memory alloy wire motors reduce the current).

[0067] When the rebound load cell needs to move upwards ( Figure 3 ), the first memory alloy wire motor, the second memory alloy wire motor, the fifth memory alloy wire motor, and the sixth memory alloy wire motor increase the current at the same time (the other memory alloy wire motors reduce the current); when the rebound pressure measuring module needs to move downward ( Figure 3 ), the third memory alloy wire motor, the fourth memory alloy wire motor, the seventh memory alloy wire motor, and the eighth memory alloy wire motor increase the current at the same time (the other memory alloy wire motors reduce the current).

[0068] When powered on, the rebound pressure measurement module can generate a magnetic field to control the launch and recovery of the probe, and then obtain the internal pressure characteristics of the eyeball through calculation, providing data support for the subsequent determination of the intraocular pressure value.

[0069] The rebound pressure measurement module includes a guide 3-1, a probe 3-2, a transmitting coil 3-3, and a recovery coil 3-4. The probe can be axially slidably positioned in the center of the guide. The front end of the probe is a small round plastic ball. The recovery coil and the transmitting coil are coils densely wound on the front and rear of the guide, respectively. When the transmitting coil is energized, a magnetic field is generated to cause the probe to pop forward. After the probe collides with the eyeball, it rebounds. When the recovery coil is energized, a magnetic field is generated to cause the probe to be recovered into place. When the probe is launched and moves forward, the recovery coil generates an induced magnetic field, so that the extended length of the probe can be detected. When the probe rebounds and moves backward, the recovery coil generates an induced magnetic field, so that the rebound speed of the probe can be detected, thereby calculating the intraocular pressure. The above structure is the same as that of the existing tonometer.

[0070] The optical fixation module also includes a CCD camera 3-5, a spectroscope 3-6, a convex lens 3-7, and an indicator light 3-8. Figure 7 As shown, the CCD camera, spectroscope, convex lens and indicator light are all arranged in the inner bracket. The CCD camera is arranged behind the guide member ( Figure 7The beam splitter is set between the guide and the CCD camera, the convex lens is set in the middle of the guide, and the indicator light is set below the beam splitter ( Figure 7 The guide, CCD camera, beam splitter, and convex lens are coaxially arranged. The guide axially passes through the center of the convex lens. The beam splitter is arranged at a 45-degree angle to the central axis of the guide. The virtual image of the indicator light in the beam splitter is located on the central axis of the guide. The virtual image of the indicator light in the beam splitter is a distant view of the hot air balloon. The user can observe this virtual image through the convex lens, thereby guiding the user's line of sight and preventing eye movement during measurement.

[0071] The controller is electrically connected to the memory alloy wire motor, the transmitting coil, the recovering coil, the CCD camera, and the indicator light. The rear of the telescope barrel is also provided with a display screen (omitted in the figure) for displaying intraocular pressure data.

[0072] The memory alloy wire motor is made of SMA material.

[0073] The controller controls the temperature of the memory alloy wire motor by adjusting the PWM pulse duty cycle, thereby causing the memory alloy wire motor to extend and shorten.

[0074] The memory alloy wire motor is heated when the PWM output is high, and cooled when it is low, until it reaches a thermal equilibrium state and achieves stable temperature control. The electric heating equation of the memory alloy wire motor can be expressed as:

[0075]

[0076] Where: m SMA is the mass of the memory alloy wire motor; c p is the specific heat of the memory alloy wire motor; T(t) is the temperature of the memory alloy wire motor; t is time; U is the voltage across the memory alloy wire motor. When U=0, the formula describes the cooling process of the resistance wire, and when U>0, the formula describes the heating process of the resistance wire; R is the resistance value of the SMA wire; τ is the duty cycle of the PWM pulse; h is the convection heat transfer coefficient; A is the surface area of the SMA for convection heat transfer; T0 is the ambient temperature.

[0077] The above components are all existing technologies and can be purchased from outside.

[0078] A method for measuring intraocular pressure, comprising the following steps:

[0079] Step 1: The user gently places the device in front of their eyes, ensuring that the eye mask fits tightly around the eye area and stabilizes the device position to prepare for subsequent automated measurement.

[0080] Step 2: The indicator light turns on (the user sees a distant image of a hot air balloon). The user looks forward according to the indicator light, ensuring that the eyeball is relatively still and the direction of vision is fixed. The eyeball is aligned with the center of the rebound pressure measurement module so that the probe can hit the ideal position during subsequent pressure measurements. This is a key prerequisite for the system to perform accurate automatic alignment.

[0081] Step 3: The CCD camera captures an image of the eyeball through a beam splitter and a lens to obtain the center position of the cornea. The controller determines the deviation between the central axis of the guide and the center of the eyeball 9 based on the image. The position adjustment module adjusts the position of the rebound pressure measurement module so that the central axis of the guide is close to the center of the eyeball. The position adjustment module adjusts the position of the rebound pressure measurement module so that the central axis of the guide is close to the center of the cornea of the eyeball (the cross section of the guide is located at the center of the cornea). The rebound pressure measurement module is activated and drives the probe to be ejected gently and at high speed toward the cornea to find the center of the cornea of the eyeball:

[0082] (1) Establish a pressure measurement coordinate system at the current position of the rebound pressure measurement module ( Figure 5 As shown in FIG, the center of the rebound pressure measuring module is the origin O, the horizontal direction is the X axis, and the vertical direction is the Y axis;

[0083] The position adjustment module drives the rebound pressure measuring module to move along the X-axis of the pressure measuring coordinate system. Multiple measuring points are set on the X-axis. The rebound pressure measuring module impacts each measuring point in turn and measures the extended length of the probe. When the extended length of the probe at a certain measuring point is less than the extended length of the probes at the measuring points on both sides, the measuring point is used as the X-axis measurement coordinate of the pressure measuring coordinate system, and the position adjustment module drives the rebound pressure measuring module to move to the X-axis measurement coordinate.

[0084] The measurement points are distributed on the positive and negative half axes of the X-axis with a spacing of 1 mm;

[0085] The rebound pressure measuring module is first moved to one side for measurement. If the probe extension length of the subsequent measurement point is greater than that of the previous measurement point, it means that the measurement point is far from the center of the eyeball and the rebound pressure measuring module needs to be driven to the other side for measurement. If the probe extension length of the subsequent measurement point is less than that of the previous measurement point, it means that the measurement point is close to the center of the eyeball.

[0086] The specific process is:

[0087] like Figure 9 As shown, the rebound pressure measuring module is at the initial position, the X-axis coordinate is marked as X1, the Y-axis coordinate is marked as Y1, the rebound pressure measuring module performs the first impact, the first impact point of the eyeball is C1, and the extension length of the probe is L1;

[0088] like Figure 10As shown, the rebound pressure measuring module moves 1 mm toward the positive half axis of the X axis, and the X axis coordinate is marked as X2. The rebound pressure measuring module performs a second impact, and the second impact point of the eyeball is C2. The extended length of the probe is L2, and L2 is less than L1.

[0089] like Figure 11 As shown, the rebound pressure measuring module continues to move 1 mm toward the positive half axis of the X axis, and the X axis coordinate is marked as X3. The rebound pressure measuring module performs a third impact, and the third impact point of the eyeball is C3. The extended length of the probe is L3, and L3 is greater than L2.

[0090] Therefore, with X2 as the X-axis measurement coordinate, the position adjustment module drives the rebound pressure measurement module to move to the X-axis measurement coordinate X2;

[0091] (2) With the X-axis measurement coordinate of the pressure measurement coordinate system as a reference, the position adjustment module drives the rebound pressure measurement module to move in a direction parallel to the Y-axis of the pressure measurement coordinate system. Multiple measurement points are set on the Y-axis. The rebound pressure measurement module impacts each measurement point in turn and measures the extension length of the probe. When the extension length of the probe at a certain measurement point is less than the extension length of the probe at the measurement points on both sides, the measurement point is used as the Y-axis measurement coordinate of the pressure measurement coordinate system, and the position adjustment module drives the rebound pressure measurement module to move to the Y-axis measurement coordinate.

[0092] The measurement points are distributed in the direction parallel to the Y axis and the spacing is 1 mm;

[0093] The rebound pressure measuring module is first moved to one side for measurement. If the probe extension length of the subsequent measurement point is greater than that of the previous measurement point, it means that the measurement point is far from the center of the eyeball and the rebound pressure measuring module needs to be driven to the other side for measurement. If the probe extension length of the subsequent measurement point is less than that of the previous measurement point, it means that the measurement point is close to the center of the eyeball.

[0094] The specific process is:

[0095] The rebound pressure measuring module is located at (X2, Y1); Figure 12 As shown, the rebound pressure measuring module moves 1 mm toward the positive half axis of the Y axis, the Y axis coordinate is marked as Y2, the rebound pressure measuring module performs the fourth impact, the fourth impact point of the eyeball is C4, the extension length of the probe is L4, and L4 is less than L2;

[0096] The rebound pressure measuring module continues to move 1 mm toward the positive half of the Y axis. The Y axis coordinate is marked as Y3. The rebound pressure measuring module performs the fifth impact. The fifth impact point of the eyeball is C5. The extended length of the probe is L5, which is greater than L4.

[0097] Therefore, with Y2 as the Y-axis measurement coordinate, the position adjustment module drives the rebound pressure measurement module to move to the Y-axis measurement coordinate Y2; at this time, the difference between the probe axis and the center of the cornea of the eyeball can be guaranteed to be within 2mm;

[0098] Step 4: Using the X-axis and Y-axis measurement coordinates as the pressure measurement points (X2 and Y2), the CCD camera captures the eyeball image and obtains the axial distance between the eyeball and the probe. The position adjustment module adjusts the axial distance between the rebound pressure measurement module and the eyeball (precisely controlling the safe working distance from the probe to the cornea) to meet the test requirements (the probe is 6-8 mm away from the eyeball). The rebound pressure measurement module is activated, driving the probe to be gently and rapidly ejected toward the cornea. Based on the motion parameters of the probe (motion parameters during impact with the cornea and rebound, including the initial velocity of the probe when it hits the eyeball, the acceleration during the collision, and the time of collision with the eyeball), the intraocular pressure is calculated in real time. The calculation uses a trained random forest algorithm model, which is an existing method.

[0099] Step 5: End the measurement and move the device away from the user.

[0100] Example 2

[0101] The difference from Example 1 is that:

[0102] like Figure 14 As shown, the position adjustment module includes an inner bracket 4-10 axially slidably positioned in the telescope barrel and four memory alloy wire motors arranged parallel to the sliding direction of the inner bracket and connecting the telescope barrel and the inner bracket.

[0103] The inner wall of the telescope barrel is provided with a slide groove 4-12 to guide the inner bracket to slide. Four memory alloy wire motors are evenly arranged around the central axis of the telescope barrel, that is, a memory alloy wire motor is arranged every 90 degrees along the circumferential direction.

[0104] The two ends of each memory alloy wire motor are fixed to the telescope barrel and the inner bracket through connectors 4-11. The outer diameter of the memory alloy wire motor is 0.6mm-0.8mm, the wire diameter is 0.2mm-0.3mm, and the length is 18mm-22mm.

[0105] By adjusting the current of these four memory alloy wire motors at the same time, they can be stretched and retracted at the same time, thereby driving the rebound pressure measuring module to move back and forth, and then adjusting the axial distance between the rebound pressure measuring module and the eyeball.

[0106] A method for measuring intraocular pressure, comprising the following steps:

[0107] Step 1: The user gently places the device in front of their eyes, ensuring that the eye mask fits tightly around the eye area and stabilizes the device position to prepare for subsequent automated measurement.

[0108] Step 2: The indicator light turns on (the user sees a distant image of a hot air balloon). The user looks forward according to the indicator light, ensuring that the eyeball is relatively still and the direction of vision is fixed. The eyeball is aligned with the center of the rebound pressure measurement module so that the probe can hit the ideal position during subsequent pressure measurements. This is a key prerequisite for the system to perform accurate automatic alignment.

[0109] Step 3: The CCD camera captures an image of the eyeball and obtains the axial distance between the eyeball and the probe. The position adjustment module adjusts the axial distance between the rebound pressure measurement module and the eyeball. The rebound pressure measurement module is activated, driving the probe to be ejected gently and at high speed toward the cornea. The intraocular pressure is calculated in real time based on the motion parameters of the probe.

[0110] Step 4: End the measurement and move the device away from the user.

[0111] Example 3

[0112] The difference from Example 2 is that:

[0113] like Figure 15 As shown, the position adjustment module includes an inner bracket 4-10 that can be axially slidably positioned in the telescope barrel, a seal 4-13 arranged between the telescope barrel and the inner bracket, a position adjustment cavity 4-14 surrounded by the seal, the inner wall of the telescope barrel and the outer wall of the inner bracket, and an air pump (omitted in the figure) connected to the position adjustment cavity.

[0114] The inner bracket is a cylinder with an open front end to ensure that the position adjustment cavity is a sealed cavity. The sealing member blocks the gap between the inner wall of the telescope cylinder and the outer wall of the inner bracket.

[0115] When the air pump is inflated, the air pressure in the position adjustment chamber increases, the inner bracket moves to the left, and the rebound pressure measuring module approaches the eyeball. When the air pump is deflating, the air pressure in the position adjustment chamber decreases, the inner bracket moves to the right, and the rebound pressure measuring module moves away from the eyeball.

[0116] The accompanying drawings show preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

Claims

1. An intraocular pressure measuring device, characterized in that: The invention comprises a telescope barrel (1) with an eye mask, a rebound pressure measuring module arranged in the telescope barrel, a position adjustment module connecting the telescope barrel and the rebound pressure measuring module, and a controller electrically connecting the position adjustment module and the rebound pressure measuring module.

2. An intraocular pressure measuring device according to claim 1, characterized in that: The rebound pressure measuring module comprises a guide (3-1), a probe (3-2) axially slidably positioned on the guide, and a recovery coil (3-4) and a transmitting coil (3-3) respectively arranged at the front and rear ends of the guide.

3. The intraocular pressure measuring device according to claim 2, wherein: The inner bracket is also provided with an optical fixation module; the optical fixation module comprises a CCD camera (3-5) arranged behind the guide member, a beam splitter (3-6) arranged between the guide member and the CCD camera, a convex lens (3-7) arranged in the middle of the guide member, and an indicator light (3-8) arranged below the beam splitter; the guide member, CCD camera, beam splitter, and convex lens are coaxially arranged.

4. The intraocular pressure measuring device according to claim 3, wherein: The position adjustment module comprises an outer bracket (4-9) fixed to the inner wall of the telescope barrel, an inner bracket (4-10) arranged in the outer bracket, and eight memory alloy wire motors connecting the outer bracket and the inner bracket in a diagonally cross manner.

5. The intraocular pressure measuring device according to claim 4, characterized in that: The memory alloy wire motor is respectively connected to the front upper left and right sides, the front lower left and right sides, the rear upper left and right sides, and the rear lower left and right sides of the outer bracket and the inner bracket; the rebound pressure measuring module is fixed in the inner bracket.

6. The intraocular pressure measuring device according to claim 3, characterized in that: The position adjustment module comprises an inner bracket (4-10) which is axially slidably positioned in a telescope barrel and four memory alloy wire motors which are arranged parallel to the sliding direction of the inner bracket and connect the telescope barrel and the inner bracket.

7. The intraocular pressure measuring device according to claim 3, characterized in that: The position adjustment module comprises an inner bracket (4-10) axially slidably positioned in a telescope barrel, a sealing member arranged between the telescope barrel and the inner bracket, a position adjustment cavity enclosed by the sealing member, the inner wall of the telescope barrel and the outer wall of the inner bracket, and an air pump connected to the position adjustment cavity.

8. The method for measuring intraocular pressure using the device of claim 5, comprising the following steps: Step 1: The user places the device in front of their eyes and fits the eye mask tightly to the area around their eyes, preparing for subsequent automated measurement. Step 2: The indicator light turns on to guide the user to look forward and ensure that the eye's line of sight is fixed; Step 3: The CCD camera captures the eye image and obtains the center position of the cornea. The position adjustment module adjusts the position of the rebound pressure measurement module so that the central axis of the guide is close to the center of the cornea. The rebound pressure measurement module starts and drives the probe to bounce gently and quickly toward the cornea to find the center of the cornea. (1) Establish a pressure measurement coordinate system. The position adjustment module drives the rebound pressure measurement module to move along the X-axis of the pressure measurement coordinate system. At the same time, the rebound pressure measurement module impacts multiple measurement points. When the probe extension length of a certain measurement point is less than the probe extension length of the measurement points on both sides, the measurement point is used as the X-axis measurement coordinate. The position adjustment module drives the rebound pressure measurement module to move to the X-axis measurement coordinate. (2) With the X-axis measurement coordinate as a reference, the position adjustment module drives the rebound pressure measurement module to move in a direction parallel to the Y-axis of the pressure measurement coordinate system. At the same time, the rebound pressure measurement module impacts multiple measurement points. When the probe extension length of a certain measurement point is less than the probe extension length of the measurement points on both sides, the measurement point is used as the Y-axis measurement coordinate, and the position adjustment module drives the rebound pressure measurement module to move to the Y-axis measurement coordinate; Step 4: Using the X-axis and Y-axis measurement coordinates as a reference, the CCD camera captures an image of the eyeball and obtains the axial distance between the eyeball and the probe. The position adjustment module adjusts the axial distance between the rebound pressure measurement module and the eyeball. The rebound pressure measurement module is activated, driving the probe to be ejected gently and at high speed toward the cornea. Based on the motion parameters of the probe, the intraocular pressure is calculated in real time. Step 5: End the measurement and move the device away from the user.

9. The intraocular pressure measurement method according to claim 8, wherein: In step S3, the spacing between the measuring points on the X axis is 1 mm, and the spacing between the measuring points on the Y axis is 1 mm.

10. The method for measuring intraocular pressure using the device according to claim 6 or 7, comprising the following steps: Step 1: The user places the device in front of their eyes and fits the eye mask tightly to the area around their eyes, preparing for subsequent automated measurement. Step 2: The indicator light turns on to guide the user to look forward and ensure that the eye's line of sight is fixed; Step 3: The CCD camera captures an image of the eyeball and obtains the axial distance between the eyeball and the probe. The position adjustment module adjusts the axial distance between the rebound pressure measurement module and the eyeball. The rebound pressure measurement module is activated, driving the probe to be ejected gently and at high speed toward the cornea. The intraocular pressure is calculated in real time based on the motion parameters of the probe. Step 4: End the measurement and move the device away from the user.

Images