Intraocular pressure measurement method and intraocular pressure measurement system

Abstract

The application relates to an intraocular pressure measuring method and an intraocular pressure measuring system, wherein the intraocular pressure measuring method comprises the following steps: judging whether a corneal contact lens provided with a magnetic component deviates from an intraocular pressure measuring position according to a detected magnetic field feature in a detected intraocular pressure measuring area, wherein the intraocular pressure measuring position is located in the intraocular pressure measuring area; in the case that the corneal contact lens deviates from the intraocular pressure measuring position, correcting the position of the corneal contact lens based on the magnetic field feature, so that the corneal contact lens is located at the intraocular pressure measuring position; and finally, measuring the intraocular pressure through the corneal contact lens located at the intraocular pressure measuring position. The position detection and position correction of the corneal contact lens can be realized, so that the corneal contact lens is located at an accurate intraocular pressure measuring position before intraocular pressure measurement, and the success rate of intraocular pressure measurement is improved.

Description

Technical Field

[0001] This application relates to the field of intraocular pressure measurement technology, and in particular to intraocular pressure measurement methods and systems. Background Technology

[0002] Glaucoma is the second leading cause of blindness worldwide. Long-term intraocular pressure monitoring plays a crucial role in the early detection of glaucoma, postoperative disease control, and medication-based intraocular pressure management, making it an essential means of glaucoma detection and treatment. Current intraocular pressure measurement methods include applanation, reflective, and sensor-based methods. Among them, applanation tonometry calculates intraocular pressure by flattening a certain area of ​​the eyeball and then calculating the ratio of the force applied to the flattened area.

[0003] In some related intraocular pressure measurement methods, intraocular pressure is usually measured indirectly by changes in corneal shape. For example, intraocular pressure is indirectly measured by measuring corneal deformability through a flexible variable resistor, and intraocular pressure is indirectly measured by the inductance value of an induction coil attached to the cornea.

[0004] In the above method of measuring intraocular pressure, when the contact lens is not perpendicular to the magnetic field generated by the magnetic field generation module, applying an external magnetic field to the magnetized contact lens can easily cause the contact lens to shift or even fall off, resulting in failure of the intraocular pressure measurement.

[0005] There is currently no effective solution to the problem that the corneal contact lens may shift or fall off due to the external magnetic field during intraocular pressure measurement in related technologies, which reduces the success rate of intraocular pressure measurement. Summary of the Invention

[0006] This embodiment provides an intraocular pressure measurement method and an intraocular pressure measurement system to address the problem of low success rate in intraocular pressure measurement in related technologies.

[0007] Firstly, this embodiment provides a method for measuring intraocular pressure, including:

[0008] Based on the detected magnetic field characteristics within the intraocular pressure measurement area, it is determined whether the corneal contact lens equipped with a magnetic component is deviated from the intraocular pressure measurement position, wherein the intraocular pressure measurement position is located within the intraocular pressure measurement area;

[0009] If the corneal contact lens deviates from the intraocular pressure measurement position, the position of the corneal contact lens is corrected based on the magnetic field characteristics so that the corneal contact lens is positioned at the intraocular pressure measurement position;

[0010] Intraocular pressure is measured using the corneal contact lens positioned at the intraocular pressure measurement location.

[0011] In some embodiments, the magnetic field characteristics include average magnetic field strength and magnetic field uniformity. The step of determining whether a contact lens with a magnetic component is deviated from the intraocular pressure measurement position based on the detected magnetic field characteristics within the intraocular pressure measurement area includes:

[0012] If the average magnetic field strength in the detected intraocular pressure measurement area is within a preset strength range, and the magnetic field uniformity in the detected intraocular pressure measurement area is within a preset uniformity range, then the corneal contact lens equipped with a magnetic component is determined to be in the intraocular pressure measurement position.

[0013] If the average strength of the magnetic field is within a preset strength range and the uniformity of the magnetic field is outside a preset uniformity range, then the corneal contact lens is determined to be deviated from the intraocular pressure measurement position.

[0014] In some embodiments, the step of correcting the position of the corneal contact lens based on the magnetic field characteristics, so that the corneal contact lens is positioned at the intraocular pressure measurement location when the contact lens deviates from the intraocular pressure measurement location, includes:

[0015] When the corneal contact lens deviates from the intraocular pressure measurement position, a first generation parameter for generating a first external magnetic field is calculated based on the magnetic field characteristics; the first external magnetic field is used to generate an attractive force on the magnetic component, so that the magnetic component drives the corneal contact lens to the intraocular pressure measurement position under the action of the attractive force.

[0016] Based on the first generated parameters, the first external magnetic field is applied to the magnetic component.

[0017] In some embodiments, the measurement of intraocular pressure via the corneal contact lens located at the intraocular pressure measurement position includes:

[0018] A second external magnetic field is generated according to the second generation parameters, and the second external magnetic field is used to generate a thrust on the magnetic component.

[0019] The frequency change information of the sensing coil of the corneal contact lens is detected; wherein, the magnetic component is disposed in a predetermined central area of ​​the corneal contact lens; and the sensing coil is disposed inside the magnetic component;

[0020] When the corneal contact lens is determined to be in a preset deformation state based on the frequency change information, the first intraocular pressure measurement value of the intraocular pressure measurement object is determined based on the second generated parameter.

[0021] In some embodiments, the frequency change information of the sensing coil for detecting the corneal contact lens includes:

[0022] The first resonant frequency of the sensing coil of the corneal contact lens and the second resonant frequency of the reference coil of the corneal contact lens are detected; the reference coil is disposed in a predetermined edge region of the corneal contact lens;

[0023] Based on the difference between the first resonant frequency and the second resonant frequency, the frequency change information of the sensing coil of the corneal contact lens is determined;

[0024] When the corneal contact lens is determined to be in a preset deformation state based on the frequency change information, the first intraocular pressure measurement value of the intraocular pressure measurement object is determined based on the second generated parameter, including:

[0025] When the difference between the first resonant frequency and the second resonant frequency is a preset reference difference, the corneal contact lens is determined to be in a preset deformation state.

[0026] When the corneal contact lens is determined to be in a preset deformation state, the first intraocular pressure measurement value of the intraocular pressure measurement object is determined based on the second generated parameter.

[0027] In some embodiments, the method further includes:

[0028] The resonant frequency of the reference coil is detected, and the reference difference is determined based on a first mapping information preset between the resonant frequency of the reference coil and the reference difference.

[0029] In some embodiments, determining the first intraocular pressure measurement value of the intraocular pressure measurement object based on the second generated parameters includes:

[0030] The intraocular pressure value corresponding to the second generated parameter is determined based on the preset second mapping information;

[0031] The intraocular pressure value corresponding to the second generated parameter is determined as the first intraocular pressure measurement value of the intraocular pressure measurement object.

[0032] In some embodiments, the preset second mapping information is established in advance based on the correspondence between the second generation parameter and the thrust generated by the second external magnetic field, and the correspondence between the thrust and the intraocular pressure value.

[0033] In some embodiments, the method further includes:

[0034] The damping change characteristics of the sensing coil are obtained during and after the application of the second external magnetic field to the magnetic component.

[0035] Based on the damping change characteristics, calculate the inherent deformation characteristic parameters of the intraocular pressure measurement object and the second intraocular pressure measurement value;

[0036] The target intraocular pressure (IOP) is obtained based on the deformation characteristic parameters, the first IOP measurement, and the second IOP measurement.

[0037] Secondly, this embodiment provides an intraocular pressure measurement system that applies the intraocular pressure measurement method described in the first aspect above.

[0038] In some embodiments, the intraocular pressure measurement system includes a corneal contact lens and a wearable detector; the corneal contact lens includes a magnetic component, a sensing coil, and a reference coil; the wearable detector includes a reading coil, a magnetic field sensor, and a magnetic field generating circuit.

[0039] The magnetic component is disposed in the central area of ​​the corneal contact lens of a predetermined size; the sensing coil is disposed inside the magnetic component; and the reference coil is disposed in the predetermined edge area of ​​the corneal contact lens.

[0040] The frequency detection range of the reading coil covers the sensing coil and the reference coil; the magnetic field detection range of the magnetic field sensor covers the magnetic component; and the magnetic field range of the magnetic field generating circuit covers the magnetic component.

[0041] In some embodiments, the magnetic component includes magnetic powder and a rigid magnetic powder skeleton; the magnetic powder is disposed within an enclosed region formed by the magnetic powder skeleton.

[0042] Compared with related technologies, the intraocular pressure (IOP) measurement method and system provided in this embodiment determine whether a contact lens equipped with a magnetic component is deviated from the IOP measurement position based on the detected magnetic field characteristics within the IOP measurement area. The IOP measurement position is located within the IOP measurement area. If the contact lens is deviated from the IOP measurement position, the position of the contact lens is corrected based on the magnetic field characteristics to ensure it is positioned correctly for IOP measurement. Finally, IOP measurement is performed using the contact lens positioned correctly. This method enables the detection and correction of the contact lens's position, ensuring it is accurately positioned before IOP measurement, thereby improving the success rate of IOP measurement.

[0043] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0044] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0045] Figure 1 This is an application scenario diagram of the intraocular pressure measurement method in this embodiment;

[0046] Figure 2 This is a flowchart of the intraocular pressure measurement method in this embodiment;

[0047] Figure 3 This is a flowchart of a preferred embodiment of a corneal contact lens position correction method;

[0048] Figure 4 This is a flowchart of a preferred embodiment of an intraocular pressure measurement method;

[0049] Figure 5 This is a schematic diagram of the structure of a corneal contact lens applied in this embodiment;

[0050] Figure 6 This is a schematic diagram of a wearable detector used in this embodiment. Detailed Implementation

[0051] To better understand the purpose, technical solution, and advantages of this application, the application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0052] Unless otherwise defined, the technical or scientific terms used in this application shall have the general meaning as understood by one of ordinary skill in the art to which this application pertains. Words such as “a,” “an,” “an,” “the,” “the,” and “these,” used in this application, do not indicate quantitative limitation and may be singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or modules (units) is not limited to the listed steps or modules (units) but may include steps or modules (units) not listed, or may include other steps or modules (units) inherent to such processes, methods, products, or devices. The terms “connected,” “linked,” and “coupled,” used in this application, are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. The term “multiple” used in this application refers to two or more. The "and / or" operator describes the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: A alone, A and B simultaneously, and B alone. Typically, the character " / " indicates that the objects before and after it are in an "or" relationship. The terms "first," "second," and "third," etc., used in this application are merely for distinguishing similar objects and do not represent a specific ordering of the objects.

[0053] The method embodiments provided in this example can be executed in the control unit of the circuit. Figure 1 This is an application scenario diagram of the intraocular pressure measurement method in this embodiment. For example... Figure 1 As shown, during intraocular pressure (IOP) measurement, the contact lens 101 is precisely fitted to the user's eyeball, with the edge of the contact lens 101 fitting against the edge of the cornea and the center of the contact lens 101 being the center of the cornea. The contact lens 101 is located within the detection range of the detector 102, allowing the detector 102 to measure IOP through the contact lens 101. Specifically, after the user wears the contact lens 101 and the detector 102, the detector 102 determines whether the contact lens 101, equipped with a magnetic component, is deviated from the IOP measurement position based on the magnetic field characteristics detected within the IOP measurement area. If the contact lens 101 is confirmed to be deviated from the IOP measurement position, the position of the contact lens 101 is corrected based on the magnetic field characteristics to bring the contact lens 101 into the IOP measurement position. Finally, the detector 102 cooperates with the contact lens 101 in the IOP measurement position to achieve IOP measurement. The specific form of the detector 102 is not limited, but preferably it can be a frame-shaped wearable detector.

[0054] This embodiment provides a method for measuring intraocular pressure. Figure 2 This is a flowchart of the intraocular pressure measurement method in this embodiment, as follows: Figure 2 As shown, the process includes the following steps:

[0055] Step S210: Based on the detected magnetic field characteristics within the intraocular pressure measurement area, determine whether the corneal contact lens with the magnetic component is deviated from the intraocular pressure measurement position, wherein the intraocular pressure measurement position is located within the intraocular pressure measurement area.

[0056] In this embodiment, before starting intraocular pressure measurement, the magnetic field within the measurement area is sensed to determine its characteristics. Based on these characteristics, it is then used to determine whether the contact lens is positioned appropriately for intraocular pressure measurement. Specifically, the measurement location can be the center of the cornea. When the center of the contact lens aligns with the center of the cornea, it is considered to be in a suitable position. Specifically, a magnetic field sensor placed near the contact lens can detect the magnetic field strength and uniformity within its sensing area to obtain these magnetic field characteristics, thereby determining whether the contact lens is positioned correctly for intraocular pressure measurement.

[0057] Understandably, the intraocular pressure measurement area can be the area sensed by a magnetic field sensor used to detect magnetic field characteristics. To determine whether the contact lens is deviating from the intraocular pressure measurement position, the magnetic field sensor can be positioned near the measurement position, and its sensing area covers that position. When the contact lens deviates from the measurement position, the distance between the contact lens and the magnetic field sensor will be too close or too far. Since the contact lens has magnetic components, the magnetic field characteristics detected by the sensor within the sensing area may not reach the preset range. For example, if the contact lens is not within the sensing area of ​​the magnetic field sensor, or if it is too close, the average magnetic field strength detected by the sensor will not be within the preset range. Similarly, if the contact lens is not in the correct measurement position, the uniformity of the magnetic field detected by the sensor will also exceed the preset uniformity range. Therefore, this embodiment can determine whether the contact lens is deviating from the measurement position based on the detected magnetic field characteristics within the intraocular pressure measurement area. In this embodiment, before measuring intraocular pressure, it is first determined whether the contact lens is in the position for measuring intraocular pressure. This can avoid measuring intraocular pressure when the contact lens is off the position for measuring intraocular pressure, thereby improving the success rate of intraocular pressure measurement and the accuracy of the measurement results.

[0058] Step S220: When the corneal contact lens deviates from the intraocular pressure measurement position, the position of the corneal contact lens is corrected based on the magnetic field characteristics so that the corneal contact lens is in the intraocular pressure measurement position.

[0059] Because the contact lens contains a magnetic component, a magnetic field can be applied to this component based on the aforementioned magnetic field characteristics. This magnetic field will cause the contact lens to move to the intraocular pressure measurement position. For example, the magnetic field can be adjusted to apply an attractive force to the magnetic component, causing the contact lens to move due to the magnetic field's attraction. Furthermore, the parameters for adjusting the magnetic field can be calculated based on the aforementioned magnetic field characteristics, ensuring that the attractive force generated by the magnetic field on the magnetic component accurately moves the contact lens to the intraocular pressure measurement position.

[0060] Additionally, the magnetic field characteristics described above can be used to determine whether the contact lens is being worn correctly. For example, if the magnetic field strength detected in the intraocular pressure measurement area is too high or too low, it indicates that the contact lens itself is not within a suitable magnetic field range. This could be due to the user not wearing the contact lens or not wearing it correctly. Therefore, a prompt message for correct contact lens wearing can be generated for the user.

[0061] In this embodiment, when it is confirmed that the contact lens is deviating from the intraocular pressure measurement position, the position of the contact lens is corrected based on the magnetic field characteristics to ensure that the contact lens is in the correct position for intraocular pressure measurement. This achieves accurate position correction of the contact lens, ensuring that it is in the correct measurement position during intraocular pressure measurement. Combined with step S210 above, this embodiment can detect and correct the position of the contact lens before intraocular pressure measurement. In related technologies, because it is impossible to detect whether the contact lens is in the correct measurement position, it is impossible to avoid the contact lens shifting or falling off due to the influence of the magnetic field, causing intraocular pressure measurement failure. This embodiment overcomes the above-mentioned problems in related technologies, ensuring that the contact lens is in the correct intraocular pressure measurement position, thus ensuring that it is perpendicular to the magnetic field generated by the magnetic field generation module during intraocular pressure measurement, thereby preventing the contact lens from shifting or falling off during measurement and improving the success rate of intraocular pressure measurement.

[0062] Step S230: Intraocular pressure is measured using a corneal contact lens positioned at the intraocular pressure measurement site.

[0063] After the contact lens position is corrected, intraocular pressure (IOP) measurement can be achieved through the interaction between the user-worn detector and the contact lens. Specifically, an external magnetic field can be used to apply a pushing force to the magnetic components of the contact lens, causing it to deform until a preset deformation state is reached for IOP calculation. Since the contact lens is in contact with the object of IOP measurement, i.e., the eyeball, deformation of the contact lens will affect the deformation of the eyeball as well. Finally, the IOP measurement value is determined based on the magnetic field generation parameters required for the external magnetic field to deform the contact lens to the preset state. A second mapping information between different IOP values ​​and different magnetic field generation parameters can be pre-established.

[0064] There are various methods for measuring intraocular pressure (IOP) using contact lenses. For example, a resistive strain gauge circuit embedded in the contact lens can be used to convert the deformation of the lens caused by an external magnetic field into a specific signal. This signal is then used to determine whether the contact lens has reached a preset deformation state, thereby calculating the corresponding IOP value. Alternatively, an LC coil can be integrated into the contact lens, and a component capable of reading the coil's oscillation frequency can be placed on the outside of the lens. Based on the frequency read externally, the deformation of the contact lens under the influence of a magnetic field can be determined, thus determining whether the contact lens is in a preset deformation state, thereby achieving IOP measurement. Specifically, to more accurately detect the deformation state of the contact lens, a sensing coil can be placed at the center of the contact lens, and a reference coil can be placed at the edge. By detecting the difference in the resonant frequencies of these two coils during the contact lens deformation process, it can be determined whether the contact lens has reached a preset deformation state. For example, if the frequency difference reaches a preset reference difference, the contact lens is considered to have reached the preset deformation state. At this point, the intraocular pressure measurement value of the corneal contact lens can be determined based on the generation parameters of the external magnetic field.

[0065] Furthermore, the reference difference can be adjusted based on the different detection distances of the contact lens. For example, when using a wearable detector to detect the resonant frequencies of the sensing coil and reference coil on the contact lens, the resonant frequency read by the reference coil will differ depending on the distance between the wearable detector and the contact lens. Therefore, this embodiment can also pre-set the correspondence between the resonant frequencies of multiple reference coils and the reference difference, that is, different resonant frequencies of the reference coils correspond to different reference differences. This embodiment obtains the corresponding reference difference based on the read resonant frequency of the reference coil. When the frequency difference reaches the reference difference, it is determined that the contact lens is in a preset deformation state. Therefore, this embodiment can determine the change in the detection distance relative to the contact lens when detecting the contact lens and compensate for the influence of this change on the magnetic field, thereby improving the accuracy of detecting the deformation state of the contact lens.

[0066] In addition, considering the different effects of individual corneal hardness and Young's modulus on intraocular pressure values, this embodiment can also calculate the inherent hardness-related parameters of the cornea itself based on the damping change characteristics of the sensing coil during intraocular pressure measurement. The measured intraocular pressure value can then be corrected based on the aforementioned inherent hardness-related parameters, thereby improving the accuracy of intraocular pressure measurement without the need for initial intraocular pressure correction for individual users.

[0067] Steps S210 to S230 above determine whether the contact lens with the magnetic component is deviated from the intraocular pressure measurement position based on the detected magnetic field characteristics within the intraocular pressure measurement area. The intraocular pressure measurement position is located within the intraocular pressure measurement area. If the contact lens is deviated from the measurement position, its position is corrected based on the magnetic field characteristics to ensure it is positioned correctly. Finally, intraocular pressure is measured using the contact lens in the correct position. This method enables contact lens position detection and correction, ensuring the contact lens is accurately positioned before measurement, thus improving the success rate of intraocular pressure measurement. Furthermore, the contact lens position detection and correction function in this embodiment allows for convenient long-term use with free movement and avoids errors in intraocular pressure measurement caused by rapid eye movement (REM) during sleep.

[0068] Furthermore, in one embodiment, based on the above step S210, determining whether the corneal contact lens with the magnetic component is deviated from the intraocular pressure measurement position based on the detected magnetic field characteristics within the intraocular pressure measurement area may specifically include:

[0069] If the average magnetic field strength within the detected intraocular pressure measurement area is within a preset strength range, and the magnetic field uniformity within the detected intraocular pressure measurement area is within a preset uniformity range, then the contact lens with the magnetic component is determined to be at the intraocular pressure measurement position; if the average magnetic field strength is within the preset strength range, and the magnetic field uniformity is outside the preset uniformity range, then the contact lens is determined to be deviated from the intraocular pressure measurement position.

[0070] The average magnetic field strength and uniformity can be detected using a magnetic field sensor. For example, a magnetic field sensor circuit can be installed on a wearable detector to detect the average magnetic field strength and uniformity before intraocular pressure measurement. When the average magnetic field strength is within a preset range, it indicates that the user is wearing a contact lens. At this time, the magnetic field uniformity can be detected to determine whether the worn contact lens is in the position for intraocular pressure measurement. Conversely, if the average magnetic field strength is outside the preset range, it indicates that the user is not wearing the contact lens correctly or is not wearing the wearable detector correctly. Therefore, the user can be prompted to wear the device correctly. This embodiment detects the position of the contact lens based on the average magnetic field strength and uniformity, thereby enabling accurate verification of the contact lens's position before intraocular pressure measurement. It also allows for convenient long-term wear and use by the user with free movement and avoids errors in intraocular pressure measurement caused by REM sleep.

[0071] In another embodiment, based on step S220 above, when the corneal contact lens deviates from the intraocular pressure measurement position, the position of the corneal contact lens is corrected based on the magnetic field characteristics to bring the corneal contact lens to the intraocular pressure measurement position. Specifically, this may include:

[0072] When the corneal contact lens deviates from the intraocular pressure measurement position, a first generation parameter for generating a first external magnetic field is calculated based on the magnetic field characteristics; the first external magnetic field is used to generate an attractive force on the magnetic component, so that the magnetic component drives the corneal contact lens to the intraocular pressure measurement position under the action of the attractive force; based on the first generation parameter, the first external magnetic field is applied to the magnetic component.

[0073] In this embodiment, when the magnetic field uniformity is determined to be outside a preset uniformity range, the pulsed high voltage required by the magnetic field generating circuit is calculated based on the average magnetic field strength. This pulsed high voltage causes the magnetic field generating circuit to generate a first external magnetic field that attracts the magnetic component, thereby causing the magnetic component to move the contact lens to the intraocular pressure measurement position under the influence of this attraction. In other words, the aforementioned first generation parameter can be the pulsed voltage for the magnetic field generating circuit to produce the first external magnetic field. This magnetic field generating circuit can be integrated into a wearable detector. The closer the wearable detector is to the contact lens, the lower the required reverse high voltage; conversely, the farther the wearable detector is from the contact lens, the higher the required reverse high voltage. Therefore, this embodiment calculates the first generation parameter for generating the first external magnetic field based on magnetic field characteristics to achieve accurate correction of the contact lens's position.

[0074] In another embodiment, based on the above step S230, intraocular pressure measurement is performed using a corneal contact lens located at the intraocular pressure measurement position, which may specifically include:

[0075] A second external magnetic field is generated according to the second generation parameter, which is used to generate a thrust on the magnetic component; the frequency change information of the sensing coil of the corneal contact lens is detected; wherein, the magnetic component is disposed in a preset central area of ​​the corneal contact lens; the sensing coil is disposed inside the magnetic component; when it is determined that the corneal contact lens is in a preset deformation state based on the frequency change information, the first intraocular pressure measurement value of the intraocular pressure measurement object is determined based on the second generation parameter.

[0076] The aforementioned sensing coil can specifically be an inductor coil. Under the pushing force of the second external magnetic field, the preset area at the center of the corneal contact lens will first be deformed by the pushing force. For example, a magnetic component can be disposed 4 mm from the center to the periphery of the corneal contact lens, and the sensing coil is disposed inside this magnetic component. Based on this, a circuit for reading the resonant frequency of the sensing coil can be set at a fixed position. If the corneal contact lens deforms due to the pushing force, the distance between the sensing coil and the aforementioned circuit will also change, and consequently, the read resonant frequency will also change. Therefore, this embodiment determines the deformation state of the corneal contact lens based on the frequency change information of the sensing coil. When the corneal contact lens is determined to be in a preset deformation state based on the aforementioned frequency change information, the first intraocular pressure measurement value of the intraocular pressure measurement object can be obtained. For example, the preset deformation state can be a certain degree of flattening state achieved by the corneal contact lens and the intraocular pressure measurement object under the pushing force. This embodiment does not specifically limit the preset deformation state.

[0077] Furthermore, after determining that the corneal contact lens has reached a preset deformation state, the intraocular pressure (IOP) measurement value of the target eye is determined based on the second generation parameter of the second external magnetic field generated at this time. The target eye can be the eyeball to which IOP measurement is to be performed. The second external magnetic field is generated by a magnetic field generating circuit capable of producing high-voltage pulses from 100 volts to 2000 volts. The second generation parameter is the pulse voltage required for the magnetic field generating circuit to generate the second external magnetic field. The second mapping information between the aforementioned second generation parameter and the IOP value can also be determined through pre-calibration.

[0078] In one embodiment, detecting frequency change information of the sensing coil of the corneal contact lens includes: detecting a first resonant frequency of the sensing coil of the corneal contact lens and a second resonant frequency of a reference coil of the corneal contact lens; the reference coil is disposed in a preset edge region of the corneal contact lens; determining the frequency change information of the sensing coil of the corneal contact lens based on the difference between the first resonant frequency and the second resonant frequency; when it is determined that the corneal contact lens is in a preset deformation state based on the frequency change information, determining the first intraocular pressure measurement value of the intraocular pressure measurement object based on the second generation parameter, including: determining that the corneal contact lens is in a preset deformation state when the difference between the first resonant frequency and the second resonant frequency is a preset reference difference; when it is determined that the corneal contact lens is in a preset deformation state based on the difference between the first resonant frequency and the second resonant frequency, determining the first intraocular pressure measurement value of the intraocular pressure measurement object based on the second generation parameter.

[0079] The aforementioned reference difference can be pre-measured and stored in the memory of the wearable detector. Furthermore, if the aforementioned difference fails to reach the preset reference difference, the magnetic field strength of the second external magnetic field is adjusted, and the second external magnetic field is applied to the corneal contact lens again until the aforementioned difference reaches the preset reference difference. Based on the preset reference difference and the difference between the first resonant frequency and the second resonant frequency, this embodiment can achieve accurate detection of the corneal contact lens deformation state.

[0080] The edge of the contact lens, where it contacts the sclera, is least affected by intraocular pressure and external magnetic fields. Therefore, a circuit with a fixed LC resonant frequency can be set as a reference coil in a predetermined edge region of the contact lens, and the resonant frequency of this reference coil is sensed as a fixed frequency. Thus, the deformation state of the contact lens can be determined based on the difference between the first resonant frequency read by the sensing coil and the second resonant frequency of the reference coil. That is, if the difference reaches a predetermined reference difference, it can be determined that the contact lens has reached a predetermined deformation state. Furthermore, after applying multiple constant-amplitude transient high-voltage pulses to the magnetic field generation circuit, the top displacement of the center of the contact lens will be pre-adjusted to achieve a displacement characteristic with good repeatability. At this time, the first resonant frequency of the sensing coil is recorded.

[0081] In some related technologies, a resistance strain sensor is placed 0.5 mm to 3 mm from the edge of the contact lens. Before long-distance measurement, the resistance value after the eyeball is flattened is calibrated, and the corresponding electrical information is stored as a basis for subsequent judgment on whether the eyeball has reached a flattened state. Since the location of the resistance strain sensor is not on the part of the eyeball that is directly flattened, it cannot directly reflect whether the eyeball has reached a preset deformation state. On the other hand, in related technologies, the use of resistance strain sensors to detect the deformation state of the contact lens requires a signal acquisition circuit to collect the strain signal, and a Near Field Communication (NFC) chip is also required to transmit the signal, thus increasing the cost and manufacturing difficulty of the contact lens as a consumable. To address the aforementioned issues, this embodiment determines the deformation state of the corneal contact lens based on the difference in resonant frequency between a reference coil in the edge region of the contact lens and a sensing coil in the center region of the contact lens. This approach enables accurate detection of the deformation state and eliminates the need for additional signal acquisition circuits, NFC chips, and other components required in related technologies, thereby reducing the manufacturing cost and complexity of the contact lens.

[0082] Furthermore, in one embodiment, the above-described intraocular pressure measurement method further includes:

[0083] The resonant frequency of the reference coil is detected, and the reference difference is determined based on the first mapping information preset between the resonant frequency of the reference coil and the reference difference.

[0084] It should be noted that when reading the resonant frequency of the reference coil of a contact lens, changes in the distance between the reading circuit and the contact lens will also change the resonant frequency of the reference coil. This change will affect the reference difference value corresponding to the contact lens reaching the preset deformation state. For example, due to different users, the distance between the wearable detector and the contact lens will vary, resulting in different resonant frequencies of the reference coil read by the reading circuit on the wearable detector.

[0085] In related technologies, the impact of varying wearing distances between the glasses carrying the magnetic field generating unit and the contact lens containing integrated magnetic powder driven by the magnetic field on the magnetic field generation effect is not considered. This leads to significant changes in the magnetic force acting on the contact lens due to slight variations in wearing distance, resulting in substantial measurement errors. This embodiment addresses the influence of the contact lens detection distance on the final measurement result by pre-determining the mapping information between the resonant frequencies of different reference coils and the reference difference as first mapping information. When the resonant frequency of the reference coil changes, a new reference difference is determined based on this first mapping information, thereby detecting the deformation state. Therefore, this embodiment can compensate for changes in the distance between the contact lens and the detection device, improving the accuracy of intraocular pressure measurement. Furthermore, this embodiment's intraocular pressure measurement is adaptable to different users and to variations in the distance between the wearable detector and the contact lens caused by different user activity levels. This embodiment provides a distance detection and compensation function between the wearable detector and the contact lens, facilitating use by different users and even during extended periods of free movement by the same user.

[0086] Additionally, in one embodiment, determining the first intraocular pressure measurement value of the intraocular pressure measurement object based on the second generation parameter may include:

[0087] The intraocular pressure (IOP) value corresponding to the second generated parameter is determined based on the preset second mapping information; the IOP value corresponding to the second generated parameter is then determined as the first IOP measurement value of the IOP measurement object. By determining the IOP value corresponding to the second generated parameter from the pre-established second mapping information, the computational workload of the IOP measurement process can be simplified, improving the convenience and efficiency of IOP measurement.

[0088] Furthermore, in one embodiment, the preset second mapping information is established in advance based on the correspondence between the second generation parameter and the thrust generated by the second external magnetic field, and the correspondence between the thrust and the intraocular pressure value. Specifically, based on the correspondence between the second generation parameter and the thrust generated by the second external magnetic field, and based on the correspondence between the thrust and the intraocular pressure value, the intraocular pressure value corresponding to different second generation parameters can be determined, and then the second mapping information between the second generation parameter and the intraocular pressure value can be established through pre-measurement.

[0089] Alternatively, in one embodiment, the above-described intraocular pressure measurement method may further include:

[0090] During and after applying the second external magnetic field to the magnetic component, the damping change characteristics of the sensing coil are acquired; based on the damping change characteristics, the inherent deformation characteristic parameters of the intraocular pressure measurement object and the second intraocular pressure measurement value are calculated; based on the deformation characteristic parameters, the first intraocular pressure measurement value and the second intraocular pressure measurement value, the target intraocular pressure measurement value is obtained.

[0091] The aforementioned deformation characteristic parameters can specifically be parameters such as corneal hardness or elastic modulus. The second external magnetic field is a transient magnetic field. During and after the application of this second external magnetic field to the magnetic component, the sensing coil on the contact lens, under the influence of the magnetic force, will exhibit damped oscillations on the viscoelastic cornea. This mechanical damped oscillation can be read as a damped oscillation frequency change by a reading circuit that reads the resonant frequency of the sensing coil. Next, by analyzing this damped oscillation frequency change, parameters such as corneal hardness or elastic modulus and the second intraocular pressure measurement can be further determined. Then, based on these parameters, combined with the first intraocular pressure measurement obtained in the above process, the final target intraocular pressure measurement value is obtained. The corneal hardness or elastic modulus can be used to correct the measured first intraocular pressure value.

[0092] The solution can select the more accurate intraocular pressure (IOP) value from the first IOP measurement and the second IOP measurement as the final IOP measurement value, or calculate the first IOP measurement and the second IOP measurement based on a preset calculation rule to obtain the final IOP measurement value. This solution does not specify the calculation method for the final target IOP measurement value.

[0093] In related technologies, the inability to measure deformation characteristics such as corneal stiffness necessitates manual correction of intraocular pressure (IOP) values ​​for each individual due to their inherent deformation characteristics, thus affecting measurement efficiency. This embodiment calculates the inherent deformation characteristics of the IOP measurement subject based on damping variation characteristics, thereby correcting the IOP value. This eliminates the need for manual correction during IOP measurement, improving both accuracy and efficiency.

[0094] The present embodiment will now be described and illustrated through preferred embodiments.

[0095] In this preferred embodiment, when using a contact lens in conjunction with a wearable detector to measure intraocular pressure, the process sequentially includes a self-test phase for the contact lens and a measurement and processing phase for measuring intraocular pressure. The self-test phase primarily involves the detection and correction of the contact lens's position, while the measurement and processing phase mainly involves the contact lens and the wearable detector working together to complete the intraocular pressure measurement. Specifically, regarding the self-test phase... Figure 3 This is a flowchart of a preferred embodiment of a corneal contact lens position correction method. This position correction method is used prior to intraocular pressure measurement; regarding the aforementioned measurement and processing stages, Figure 4 This is a flowchart of a preferred embodiment of an intraocular pressure measurement method.

[0096] like Figure 3 As shown, this intraocular pressure measurement method includes the following steps:

[0097] Step S301: Activate the magnetic field sensor integrated on the wearable detector; wherein, the wearable detector can be a portable eyeglass used in conjunction with a contact lens; the contact lens is provided with a magnetic component;

[0098] Step S302: Based on the magnetic field sensor, detect the average magnetic field strength and magnetic field uniformity within the preset intraocular pressure measurement area.

[0099] Step S303: Determine whether the average magnetic field strength is within the preset strength range. If yes, proceed to step S304; otherwise, proceed to step S305.

[0100] Step S304: Determine whether the magnetic field uniformity is within the preset uniformity range. If yes, proceed to step S307; otherwise, proceed to step S308.

[0101] Step S305 prompts the user to wear the wearable detector and contact lens correctly;

[0102] Step S306: After the user confirms that the device is worn correctly, return to step S301.

[0103] Step S307: Determine that the corneal contact lens is in the intraocular pressure measurement position, and measure the intraocular pressure through the corneal contact lens in the intraocular pressure measurement position;

[0104] Step S308: Calculate the pulse voltage of the first external magnetic field based on the average magnetic field strength, apply the first external magnetic field, and return to step S301; wherein, the first external magnetic field is used to generate an attractive force on the magnetic components of the corneal contact lens.

[0105] like Figure 4 As shown, this intraocular pressure measurement method includes:

[0106] Step S401: A second external magnetic field is applied to the magnetic component of the corneal contact lens through the magnetic field generation circuit on the wearable detector; wherein, the second external field is used to generate a thrust on the magnetic component.

[0107] Step S402: The first resonant frequency of the sensing coil in the central region of the corneal contact lens and the second resonant frequency of the reference coil in the edge region of the corneal contact lens are read by the reading coil on the wearable detector.

[0108] Step S403: During and after the application of the second external magnetic field to the magnetic component, the damping change characteristics of the sensing coil are obtained.

[0109] Step S404: Based on the damping change characteristics, calculate the inherent deformation characteristic parameters and intraocular pressure value of the intraocular pressure measurement object;

[0110] Step S405: Determine the reference difference value corresponding to the second resonant frequency that was measured in advance, based on the second resonant frequency.

[0111] Step S406: Determine whether the difference between the first resonant frequency and the second resonant frequency reaches the above-mentioned reference difference; if yes, proceed to step S407; otherwise, return to step S401.

[0112] Step S407: Based on the pulse voltage of the second external magnetic field generated at this time, determine the intraocular pressure value corresponding to the pulse voltage from the preset second mapping information;

[0113] In step S408, based on the intraocular pressure value obtained in step S404 through the damping change characteristics, the intraocular pressure value corresponding to the pulse voltage in step S407, and the deformation characteristic parameters, the final intraocular pressure measurement value is obtained.

[0114] In this embodiment, an intraocular pressure measurement system is also provided, which applies the intraocular pressure measurement method provided in any of the above embodiments. Specifically, as Figure 1As shown, the intraocular pressure measurement system may include a corneal contact lens 101 and a detector 102. The corneal contact lens 101 is a contact lens, and the detector 102 can be a frame-type wearable detector, also known as a portable eyeglass. This intraocular pressure measurement system can detect and correct the position of the corneal contact lens, ensuring it is in an accurate position for measurement before measurement, thereby improving the success rate of intraocular pressure measurement.

[0115] In one embodiment, the detector 102 is used to determine that the contact lens with the magnetic component is located in the intraocular pressure measurement area when the average magnetic field strength in the detected intraocular pressure measurement area is within a preset strength range and the magnetic field uniformity in the detected intraocular pressure measurement area is within a preset uniformity range; and to determine that the contact lens is deviated from the intraocular pressure measurement position when the average magnetic field strength is within a preset strength range and the magnetic field uniformity is outside a preset uniformity range.

[0116] In another embodiment, the detector 102 is further configured to calculate, based on magnetic field characteristics, a first generation parameter for generating a first external magnetic field when the contact lens deviates from the intraocular pressure measurement position; the first external magnetic field is used to generate an attractive force on the magnetic component, so that the magnetic component drives the contact lens to move to the intraocular pressure measurement position under the attraction force; and the first external magnetic field is applied to the magnetic component based on the first generation parameter.

[0117] In one embodiment, the detector 102 is further configured to generate a second external magnetic field based on a second generation parameter, the second external magnetic field being used to generate a thrust on the magnetic component; detect frequency change information of the sensing coil of the corneal contact lens; wherein the magnetic component is disposed in a preset central region of the corneal contact lens; the sensing coil is disposed inside the magnetic component; when it is determined based on the frequency change information that the corneal contact lens is in a preset deformation state, a first intraocular pressure measurement value of the intraocular pressure measurement object is determined based on the second generation parameter.

[0118] In one embodiment, the detector 102 is used to detect a first resonant frequency of the sensing coil of the corneal contact lens and a second resonant frequency of a reference coil of the corneal contact lens; the reference coil is disposed in a preset edge region of the corneal contact lens; based on the difference between the first resonant frequency and the second resonant frequency, frequency change information of the sensing coil of the corneal contact lens is determined; when the difference between the first resonant frequency and the second resonant frequency is a preset reference difference, it is determined that the corneal contact lens is in a preset deformation state; when it is determined that the corneal contact lens is in a preset deformation state, a first intraocular pressure measurement value of the intraocular pressure measurement object is determined based on a second generation parameter.

[0119] In one embodiment, the detector 102 is used to detect the resonant frequency of the reference coil and determine the reference difference based on a first mapping information preset between the resonant frequency of the reference coil and the reference difference.

[0120] In one embodiment, the detector 102 is used to determine the intraocular pressure value corresponding to the second generation parameter according to the preset second mapping information; and to determine the intraocular pressure value corresponding to the second generation parameter as the first intraocular pressure measurement value of the intraocular pressure measurement object.

[0121] In one embodiment, the detector 102 is further configured to acquire the damping change characteristics of the sensing coil during and after the application of the second external magnetic field to the magnetic component; calculate the inherent deformation characteristic parameters of the intraocular pressure measurement object and the second intraocular pressure measurement value based on the damping change characteristics; and obtain the target intraocular pressure measurement value based on the deformation characteristic parameters, the first intraocular pressure measurement value and the second intraocular pressure measurement value.

[0122] In one embodiment, the intraocular pressure measurement system includes a corneal contact lens and a wearable detector. The corneal contact lens includes a magnetic component, a sensing coil, and a reference coil; the wearable detector includes a reading coil, a magnetic field sensor, and a magnetic field generating circuit. The magnetic component is disposed within a central area of ​​a predetermined size on the corneal contact lens; the sensing coil is disposed inside the magnetic component; the reference coil is disposed within a predetermined edge area on the corneal contact lens; the frequency detection range of the reading coil covers both the sensing coil and the reference coil; the magnetic field detection range of the magnetic field sensor covers the magnetic component; and the magnetic field range of the magnetic field generating circuit covers the magnetic component.

[0123] Figure 5 This is a schematic diagram of the structure of a corneal contact lens 50 used in this embodiment. Figure 5 As shown, the corneal contact lens 50 includes a magnetic component, an outer edge 52 of the corneal contact lens, a reference coil 53, a sensing coil 54, a resonant capacitor 55, and a resonant capacitor 56. The magnetic component includes a magnetic powder framework 511 and magnetic powder 512. Figure 5 In this diagram, the magnetic powder 512 is represented by the shaded area within the closed region formed by the magnetic powder framework 511. The reference coil 53 and the resonant capacitor 55 form a resonant circuit, and the sensing coil 54 and the resonant capacitor 56 also form a resonant circuit. In this embodiment, the sensing coil 54 is arranged inside the magnetic component, which is located in the central region, while the reference coil 53 is located in the edge region. This allows the contact lens to deform to a predetermined degree under the influence of an external magnetic field, and the deformation state of the contact lens can be accurately detected by the sensing coil 54 and the reference coil 53.

[0124] Figure 6 This is a schematic diagram of the structure of a wearable detector 60 used in this embodiment. Figure 6As shown, the wearable detector 60 includes a reading coil 61, a magnetic field generating circuit 62, a magnetic field sensor 63, a portable lens 64, portable temples 65, and a portable nose bridge 66. Additionally, the wearable detector 60 may also include a power supply and a circuit communication module (not shown in the figure).

[0125] In this embodiment, the consumable components of the corneal contact lens are all passive LC circuits, magnetic powder, hydrogel, and contact lens substrate, etc., requiring lower material and manufacturing costs, thus facilitating large-scale user expansion. Furthermore, the wearable detector does not require special fixation to the user's head, resulting in better user compliance. The high-voltage generation circuit on the wearable detector is pulsed, making it highly feasible. Additionally, the electromagnetic field frequency range sensed by the reading coil on the wearable detector is from tens of megahertz to gigahertz, while the magnetic field frequency generated by the magnetic field generation circuit is below kilohertz. Therefore, the electromagnetic field frequency sensed by the reading coil and the frequency generated by the magnetic field generation circuit are far apart, facilitating simultaneous operation of both circuits. Moreover, the pulsed magnetic field generation circuit on the wearable detector offers good circuit feasibility.

[0126] In another embodiment, the magnetic component includes magnetic powder and a rigid magnetic powder framework; the magnetic powder is disposed within a closed area formed by the magnetic powder framework. The magnetic powder framework is a rigid material, and its shape can be umbrella-shaped, mesh-like, or other shapes. The magnetic powder can be flexible or rigid, and can also be other transparent or non-transparent materials. The magnetic powder can be disposed inside the magnetic powder framework or between the various structures of the magnetic powder framework. By configuring the magnetic component as a structure composed of magnetic powder and a magnetic powder framework, and placing the magnetic powder within the closed area formed by the magnetic powder framework, it is possible to prevent the contact lens from bulging under the influence of an external magnetic field, thereby avoiding detachment from the cornea.

[0127] It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. All other embodiments derived by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0128] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0129] Obviously, the accompanying drawings are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar situations based on these drawings without any creative effort. Furthermore, it is understood that although the work done in this development process may be complex and lengthy, for those skilled in the art, certain design, manufacturing, or production modifications made based on the technical content disclosed in this application are merely conventional technical means and should not be considered as insufficient disclosure of this application.

[0130] The term "embodiment" in this application refers to a specific feature, structure, or characteristic described in connection with an embodiment that may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily imply the same embodiment, nor does it imply that it is mutually exclusive with or independent of other embodiments. It will be clearly or implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0131] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of patent protection. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

1. A method of measuring intraocular pressure, characterized by, The method comprises: determining whether the corneal contact lens provided with the magnetic component deviates from the intraocular pressure measurement position according to the detected magnetic field characteristics in the intraocular pressure measurement region, wherein the intraocular pressure measurement position is located in the intraocular pressure measurement region; in the case that the corneal contact lens deviates from the intraocular pressure measurement position, correcting the position of the corneal contact lens based on the magnetic field characteristics so as to make the corneal contact lens be in the intraocular pressure measurement position; measuring the intraocular pressure through the corneal contact lens in the intraocular pressure measurement position; the intraocular pressure measurement through the corneal contact lens in the intraocular pressure measurement position comprises: generating a second external magnetic field according to a second generation parameter, the second external magnetic field being used to generate a thrust force on the magnetic component; detecting a first resonant frequency of a sensing coil of the corneal contact lens and a second resonant frequency of a reference coil of the corneal contact lens; the reference coil is arranged in a pre-set edge region of the corneal contact lens; wherein the magnetic component is arranged in a pre-set central region of the corneal contact lens; the sensing coil is arranged inside the magnetic component; determining frequency variation information of the sensing coil of the corneal contact lens based on a difference between the first resonant frequency and the second resonant frequency; when the difference between the first resonant frequency and the second resonant frequency is a pre-set reference difference, it is determined that the corneal contact lens is in a pre-set deformation state; when it is determined that the corneal contact lens is in the pre-set deformation state, determining a first intraocular pressure measurement value of an intraocular pressure measurement object based on the second generation parameter.

2. The tonometric method according to claim 1, wherein The magnetic field characteristics comprise magnetic field average intensity and magnetic field uniformity, and the determination of whether the corneal contact lens provided with the magnetic component deviates from the intraocular pressure measurement position according to the detected magnetic field characteristics in the intraocular pressure measurement region comprises: in the case that the detected magnetic field average intensity in the intraocular pressure measurement region is in a pre-set intensity range and the detected magnetic field uniformity in the intraocular pressure measurement region is in a pre-set uniformity range, it is determined that the corneal contact lens provided with the magnetic component is in the intraocular pressure measurement position; in the case that the magnetic field average intensity is in the pre-set intensity range and the magnetic field uniformity is out of the pre-set uniformity range, it is determined that the corneal contact lens deviates from the intraocular pressure measurement position.

3. The tonometric method according to claim 1, wherein, The position correction of the corneal contact lens based on the magnetic field characteristics so as to make the corneal contact lens be in the intraocular pressure measurement position in the case that the corneal contact lens deviates from the intraocular pressure measurement position comprises: in the case that the corneal contact lens deviates from the intraocular pressure measurement position, calculating a first generation parameter for generating a first external magnetic field according to the magnetic field characteristics; the first external magnetic field is used to generate an attractive force on the magnetic component, so that the magnetic component drives the corneal contact lens to displace to the intraocular pressure measurement position under the action of the attractive force; applying the first external magnetic field to the magnetic component based on the first generation parameter.

4. The tonometric method according to claim 1, wherein The method further comprises: detecting the resonant frequency of the reference coil, and determining the reference difference according to the resonant frequency of the reference coil and first mapping information of the reference difference pre-set.

5. The tonometric method according to claim 1, wherein, The method further comprises: acquiring a damping change characteristic of the sensing coil during and after the second external magnetic field is applied to the magnetic component; calculating an inherent deformation characteristic parameter of the intraocular pressure measurement object and a second intraocular pressure measurement value according to the damping change characteristic; 6. The tonometric method according to claim 5, wherein, obtaining a target intraocular pressure measurement value based on the deformation characteristic parameter, the first intraocular pressure measurement value and the second intraocular pressure measurement value.

7. The tonometric method of claim 1, wherein, The intraocular pressure measurement system applies the intraocular pressure measurement method of any one of claims 1 to 7. The intraocular pressure measurement system comprises a contact lens and a wearable detector; the contact lens comprises a magnetic component, a sensing coil and a reference coil; the wearable detector comprises a reading coil, a magnetic field sensor and a magnetic field generating circuit; The magnetic component is arranged in a center region of a predetermined size of the contact lens; the sensing coil is arranged inside the magnetic component; and the reference coil is arranged in a predetermined edge region of the contact lens. The frequency detection range of the reading coil covers the sensing coil and the reference coil; the magnetic field detection range of the magnetic field sensor covers the magnetic component; and the magnetic field range of the magnetic field generating circuit covers the magnetic component.

8. An ocular pressure measurement system characterized by, The magnetic component comprises magnetic powder and a rigid magnetic powder framework; and the magnetic powder is arranged in a closed region formed by the magnetic powder framework.

9. The tonometric system of claim 8, wherein, ​ ​ ​ 10. The tonometric system of claim 8, wherein, ​

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