Intraocular pressure monitoring device and control method thereof

Abstract

The invention discloses an intraocular pressure monitoring device and a control method thereof, and the intraocular pressure monitoring device comprises a probe which is arranged along the axis of the intraocular pressure monitoring device; the sensing elements are distributed on a circular ring surrounding the probe at intervals, the circle center of the circular ring is located on the axis, and the plane where the circular ring is located is perpendicular to the axis; each sensing element is used for transmitting a charge signal to the cornea and receiving a first sensing signal generated by charges gathered at the center of the cornea; the main control device is in signal connection with the sensing elements, is used for controlling the sensing elements to independently emit charge signals according to different time sequences, and is also used for acquiring distance information between the sensing elements and the cornea center according to the first sensing signal; and when the distance information represents that the distance between each sensing element and the cornea center is equal, the probe is determined to be in an alignment state, so that the judgment result is more accurate, the detection accuracy and accurate measurement precision of the intraocular pressure monitoring device are improved, and the use convenience is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of ophthalmic equipment, and in particular, relates to an intraocular pressure monitoring device and a control method thereof. Background Art

[0002] The rebound tonometer includes a probe and a probe assembly containing a coaxial coil. The probe is a small, light, disposable consumable with a plastic probe at the end. During measurement, the inserted probe is magnetized and then ejected by the magnetic field generated by the coaxial coil after power is turned on. After the probe hits the cornea, its speed decreases, generating negative acceleration. The system calculates the intraocular pressure value based on the probe's speed change and rebound time.

[0003] In order to ensure that the system correctly receives the acceleration generated by the corneal rebound force, the probe needs to be vertically aligned with the central vertex of the cornea during measurement to ensure that the corneal rebound force only generates an acceleration in the direction of the signal receiver. If the probe is not aligned with the central vertex of the cornea, it will rebound in a tangential manner due to the influence of the corneal curvature, generating torque, causing the probe to not be directly backward, thus obtaining a reading with a large error. Therefore, the positioning and alignment of the probe and the corneal vertex before measurement is very critical, which affects the detection accuracy and precision.

[0004] However, in the prior art, before measurement, the user needs to judge by himself whether the probe is vertically aligned with the center vertex of the cornea by observing the aperture and the aid of the gyroscope, that is, the user positions himself and starts the measurement after alignment. The method of positioning and alignment is to use the peripheral vision of the eye to perceive the aperture around the probe. When the aperture is circularly symmetrical in the center of the field of vision, it means that the probe has been aligned with the center vertex of the cornea and the measurement can be started. However, the subjective dependence of positioning judgment is strong and some users cannot master the judgment essentials. Medical staff / measurement personnel do not know the actual positioning results and can still start the measurement even if accurate positioning is not possible, resulting in inaccurate results.

[0005] On the other hand, the rebound tonometer measures intraocular pressure by forming a depression in the cornea at the moment of impact with the cornea. Even if the positioning is aligned, the control of the impact force on the cornea when starting the measurement is also a problem that needs attention.

[0006] If the impact force is too great, resulting in a large indentation area on the corneal surface, which may cause unexpected damage to the cornea, such as forming a small scar on the cornea; if the impact force is too small, resulting in a small indentation area, the measurement result will be inaccurate or not measured at all.

[0007] Finally, users with different corneal thicknesses feel different pain from impact force, and the industry lacks an intraocular pressure meter that can adapt to the pain felt by different users and provide appropriate impact force; moreover, differences in corneal thickness affect the measurement results of intraocular pressure values.

[0008] In light of the foregoing discussion, there is a need to overcome the aforementioned deficiencies associated with existing rebound tonometers. Summary of the invention

[0009] The embodiments of the present application provide an intraocular pressure monitoring device, which can at least partially solve the defects of the aforementioned prior art during the process of measuring intraocular pressure.

[0010] The embodiment of the present application provides a control method for an intraocular pressure monitoring device to improve the detection accuracy and precision of the intraocular pressure monitoring device.

[0011] According to the first aspect of the present application, the present application provides an intraocular pressure monitoring device, which includes: a probe, which is arranged along the axis of the intraocular pressure monitoring device; a plurality of sensing elements, which are distributed at intervals on a ring surrounding the probe, the center of the ring is located on the axis, and the plane where the ring is located is perpendicular to the axis; each sensing element is used to transmit a charge signal to the cornea and receive a first sensing signal generated by the charge gathered at the center of the cornea; and a main control device, which is connected to the signals of each sensing element, the main control device is used to control the plurality of sensing elements to transmit charge signals separately according to different timings, and is also used to obtain the distance information between each sensing element and the center of the cornea according to the first sensing signal, and determine that the probe is in an aligned state when the distance information indicates that the distances between each sensing element and the center of the cornea are equal.

[0012] In some embodiments, the main control device is used to obtain dielectric induction data corresponding to each sensing element according to the first sensing signal, and the dielectric induction data is used to characterize the distance information between the sensing element and the center of the cornea; or, the main control device is used to obtain a first distance value corresponding to each sensing element according to the first sensing signal, and the first distance value is used to characterize the distance information between the sensing element and the center of the cornea, and the first distance value is the distance between the sensing element and the center of the cornea; or, the main control device is used to obtain a second distance value corresponding to each sensing element according to the first sensing signal, and the second distance value is used to characterize the distance information between the sensing element and the center of the cornea, and the second distance value is the distance between the projection point of the sensing element in a reference plane and the center of the cornea, and the reference plane is perpendicular to the axis of the intraocular pressure monitoring device and passes through the center of the cornea.

[0013] In some embodiments, the intraocular pressure monitoring device also includes a probe assembly, which is arranged along the axis of the intraocular pressure monitoring device, and the probe is installed in the probe assembly. The probe assembly includes a probe tube, and a ring where multiple sensing elements are located surrounds the probe tube; the probe tube is used to emit a charge signal to the cornea and receive a second sensing signal generated by the charge gathered at the center of the cornea; the main control device is also used to calculate the distance between the proximal end of the probe tube and the center of the cornea according to the second sensing signal in an aligned state.

[0014] In some embodiments, the main control device is used to obtain dielectric induction data corresponding to the probe cylinder according to the second induction signal, and calculate the distance between the proximal end of the probe cylinder and the center of the cornea according to the dielectric induction data corresponding to the probe cylinder.

[0015] In some embodiments, the main control device is used to calculate the distance between the proximal end of the probe barrel and the center of the cornea according to the following formula:

[0016]

[0017] Where d0 is the distance between the proximal end of the probe tube and the center of the cornea, ε r is the vacuum dielectric constant, S is the projected area of ​​the probe barrel in the plane perpendicular to the axis of the intraocular pressure monitoring device, k is the electrostatic force constant, and c is the dielectric induction data corresponding to the probe barrel.

[0018] In some embodiments, the main control device is also used to calculate the corneal dielectric constant of the eye to be tested based on the distance between the proximal end of the probe tube and the corneal center in the aligned state, and obtain the corneal thickness of the eye to be tested based on the corneal dielectric constant of the eye to be tested.

[0019] In some embodiments, the main control device is used to calculate the corneal dielectric constant of the eye to be tested according to the following formula:

[0020]

[0021] Among them, ε1 is the corneal dielectric constant of the eye to be tested, k is the electrostatic force constant, c is the dielectric induction data corresponding to the probe barrel in the aligned state, d0 is the distance between the proximal end of the probe barrel and the corneal center in the aligned state, ε0 is the aqueous humor dielectric constant of the eye to be tested, and S is the projection area of ​​the probe barrel in the plane perpendicular to the axis of the intraocular pressure monitoring device.

[0022] In some embodiments, the main control device is used to determine the target driving voltage of the probe during initial launch based on the distance between the proximal end of the probe tube and the center of the cornea and the thickness of the cornea in an aligned state, and drive the probe to move along the axis of the intraocular pressure monitoring device according to the target driving voltage; wherein the probe is configured to move along the axis of the intraocular pressure monitoring device until it contacts the cornea of ​​the eye to be tested and then rebound in the opposite direction along the axis of the intraocular pressure monitoring device.

[0023] In some embodiments, the probe assembly also includes a driving coil and a measuring coil. The driving coil is connected to the main control device and is used to drive the probe to move along the axis of the intraocular pressure monitoring device according to the target driving voltage. The measuring coil is arranged in the moving path of the probe and is configured to generate current when the probe rebounds through the measuring coil; the main control device is also used to determine the measured intraocular pressure value of the eye to be tested based on the current generated by the measuring coil, and to correct the measured intraocular pressure value based on the corneal thickness to form a corrected intraocular pressure value of the eye to be tested.

[0024] In some embodiments, the main control device includes a signal transmitting module, a signal processing module, a signal receiving module and a control module; the signal transmitting module is signal-connected to the control module and each sensing element, and the signal transmitting module is used to trigger each sensing element to transmit a charge signal under the control of the control module; the signal receiving module is signal-connected to the signal processing module and each sensing element, and the signal receiving module is used to receive a first sensing signal and send it to the signal processing module; the signal processing module is signal-connected to the control module, and is used to process the first sensing signal to form a first processed signal; the control module is used to send a control signal to each sensing element through the signal transmitting module to prompt the sensing element to send a charge signal to the cornea; the control module is also used to obtain the distance information between each sensing element and the center of the cornea according to the first processed signal, and determine that the probe is in an aligned state when the distance information indicates that the distances between each sensing element and the center of the cornea are equal.

[0025] According to the second aspect of the present application, the present application also provides a control method for an intraocular pressure monitoring device provided according to any embodiment of the present application, comprising: controlling each sensing element to emit a charge signal to the cornea of ​​the eye to be tested in a time-sequential manner; receiving a first sensing signal generated by the charge gathered at the center of the cornea of ​​the eye to be tested through each sensing element; obtaining the distance information between each sensing element and the center of the cornea according to the first sensing signal; judging whether the distances between each sensing element and the center of the cornea are equal according to the distance information between each sensing element and the center of the cornea; if so, determining that the probe is in an aligned state.

[0026] In some embodiments, judging whether the distances between each sensing element and the center of the cornea are all equal based on the distance information between each sensing element and the center of the cornea is achieved by any of the following methods: obtaining dielectric induction data corresponding to each sensing element based on the first sensing signal; judging whether the dielectric induction data corresponding to each sensing element are all the same; if so, judging that the distances between each sensing element and the center of the cornea are all equal; or, obtaining first distance values ​​corresponding to each sensing element based on the first sensing signal, the first distance value being the distance between the sensing element and the center of the cornea; judging whether the first distance values ​​corresponding to each sensing element are all the same; if so, judging that the distances between each sensing element and the center of the cornea are all equal; or, obtaining second distance values ​​corresponding to each sensing element based on the first sensing signal, the second distance value being the distance between the projection point of the sensing element in a reference plane and the center of the cornea, the reference plane being perpendicular to the central axis of the probe and passing through the center of the cornea; judging whether the second distance values ​​corresponding to each sensing element are all the same; if so, judging that the distances between each sensing element and the center of the cornea are all equal.

[0027] In some embodiments, the intraocular pressure monitoring device also includes a probe assembly, which is arranged along the axis of the intraocular pressure monitoring device, and the probe is installed in the probe assembly. The probe assembly includes a probe tube, and a ring where multiple sensing elements are located surrounds the probe tube; the control method also includes: obtaining the distance between the proximal end of the probe tube and the center of the cornea in the alignment state; calculating the corneal dielectric constant of the eye to be tested based on the distance between the proximal end of the probe tube and the corneal apex; and obtaining the corneal thickness of the eye to be tested based on the corneal dielectric constant of the eye to be tested; determining the target driving voltage of the probe at the initial launch based on the distance between the proximal end of the probe tube and the corneal apex and the corneal thickness in the alignment state; and driving the probe to move along the axis toward the direction close to the eye to be tested according to the target driving voltage.

[0028] In some embodiments, the probe assembly also includes a driving coil and a measuring coil, the driving coil is used to drive the probe to move along the axis of the intraocular pressure monitoring device, the probe is configured to rebound along the axis of the intraocular pressure monitoring device after contacting the cornea of ​​the eye to be tested, and the measuring coil is used to generate current when the probe rebounds through the measuring coil; the control method also includes: obtaining the current generated by the measuring coil after the probe rebounds; determining the measured intraocular pressure value of the eye to be tested based on the current generated by the measuring coil; and correcting the measured intraocular pressure value based on the corneal thickness to obtain the corrected intraocular pressure value of the eye to be tested.

[0029] In some embodiments, the distance between the proximal end of the probe cylinder and the center of the cornea in the aligned state is obtained in the following manner: in the aligned state, the probe cylinder is controlled to emit a charge signal to the cornea of ​​the eye to be tested; a second induction signal emitted by the charge gathered on the cornea of ​​the eye to be tested is received by the probe cylinder; the dielectric induction data corresponding to the probe cylinder is calculated based on the second induction signal; and the distance between the proximal end of the probe cylinder and the corneal vertex is calculated based on the dielectric induction data corresponding to the probe cylinder.

[0030] The intraocular pressure monitoring device provided in the embodiment of the present application sets a plurality of sensing elements on a ring surrounding the probe, and compares and analyzes the distance information between each sensing element and the center of the cornea to determine whether the probe is in an aligned state. Due to the particularity of the distribution of the sensing elements, the judgment result is more accurate, which is conducive to improving the detection accuracy and precision of the intraocular pressure monitoring device and improving the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1It is a schematic diagram of the structure of an intraocular pressure monitoring device provided in some embodiments of the present application.

[0033] Figure 2 yes Figure 1 The cross-sectional structure diagram of the intraocular pressure monitoring device shown.

[0034] Figure 3 yes Figure 1 A side view structural schematic diagram of the intraocular pressure monitoring device shown.

[0035] Figure 4 yes Figure 1 The structure schematic block diagram of the intraocular pressure monitoring device is shown.

[0036] Figure 5 yes Figure 1 Measurement schematic diagram of the intraocular pressure monitoring device shown.

[0037] Figure 6 It is a schematic diagram of the display interface of the intraocular pressure monitoring device provided in the first embodiment of the present application.

[0038] Figure 7 It is a schematic flow chart of the control method of the intraocular pressure monitoring device provided in the first embodiment of the present application.

[0039] Figure 8 yes Figure 7 A schematic flow chart for determining whether the distances between each sensing element and the center of the cornea are equal.

[0040] Fig. 9 It is a schematic flow chart of the control method of the intraocular pressure monitoring device provided in the second embodiment of the present application.

[0041] Fig.10 yes Fig. 9 A schematic flow chart of obtaining the distance between the proximal end of the probe barrel and the center of the cornea in the aligned state. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0044] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0045] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0047] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0048] The term "plurality" used in the present application refers to two or more (including two).

[0049] In the embodiments of the present application, "parallel" includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; at the same time, "vertical" includes not only the absolutely vertical situation, but also the roughly vertical situation conventionally recognized in engineering.

[0050] The inventors have found that when a charge signal is transmitted to the cornea, the corneal surface will generate induced charges and store them, becoming a "dielectric" and causing charge accumulation. Usually, the charges will accumulate in the center of the cornea. Therefore, the electrical signal in the center of the cornea can be collected and further analyzed.

[0051] The technical solution provided in the embodiment of the present application utilizes the above-mentioned dielectric induction principle to automatically determine whether the intraocular pressure monitoring device is in an alignment state, thereby reducing user dependence, and is beneficial for patients and medical staff to clearly know the positioning alignment state, thereby improving the detection accuracy and precision of the intraocular pressure monitoring device.

[0052] The technical solution provided in the embodiments of the present application is applicable to an intraocular pressure monitoring device, which includes but is not limited to an intraocular pressure meter.

[0053] Figure 1 is a schematic diagram of the structure of an intraocular pressure monitoring device provided in some embodiments of the present application, Figure 2 yes Figure 1 The schematic diagram of the cross-sectional structure of the intraocular pressure monitoring device shown in FIG. Figure 3 yes Figure 1 The side view structural diagram of the intraocular pressure monitoring device shown in FIG. Figure 4 yes Figure 1 The structure schematic block diagram of the intraocular pressure monitoring device is shown. Figure 5 yes Figure 1 Measurement schematic diagram of the intraocular pressure monitoring device shown.

[0054] Reference Figures 1 to 5 The intraocular pressure monitoring device 100 provided in the embodiment of the present application includes a probe 10 and a plurality of sensing elements 20. The probe 10 is arranged along the axis a of the intraocular pressure monitoring device 100. The probe 10 is a detection component of the intraocular pressure monitoring device 100. The plurality of sensing elements 20 are distributed at intervals on a ring b surrounding the probe 10, the center of the ring b is located on the axis a, and the plane where the ring b is located is perpendicular to the axis a. Each sensing element 20 is used to transmit a charge signal to the cornea and receive a first sensing signal generated by the charge gathered at the center of the cornea.

[0055] It can be understood that the ring b is a virtual structure for facilitating understanding of the distribution of the plurality of sensing elements 20 , and is not a physical structure.

[0056] Optionally, the probe 10 may move toward the eye 200 to be tested under the action of the driving component to act on the eye 200, and rebound away from the eye 200 after acting on the eye 200. Exemplarily, the driving component may be a driving coil.

[0057] In some embodiments, Figure 2As shown, the intraocular pressure monitoring device 100 also includes an end cap 110 and a probe assembly 60. The probe 10 is installed in the probe assembly 60, and the probe assembly 60 may include a probe barrel 62, a coil support 64 and an outer barrel 66 from the inside to the outside, and the driving coil and the measuring coil of the probe 10 are respectively installed on the outer surface of the coil support 64 (not shown). A plurality of sensing elements 20 are embedded in the end cap 110. Further, a plurality of sensing elements 20 are arranged on the end cap 110 around the periphery of the probe assembly 60.

[0058] In some embodiments, the intraocular pressure monitoring device 100 also includes a main control device 80, which is signal-connected to each sensing element 20, and is used to control multiple sensing elements 20 to individually emit charge signals according to different timings, and is also used to obtain distance information between each sensing element 20 and the corneal center 210 according to the first sensing signal, and determine that the probe 10 is in an aligned state when the distance information indicates that the distances between each sensing element 20 and the corneal center 210 are equal.

[0059] The sensing element 20 transmits a charge signal to the cornea in a non-contact manner under the control of the main control device 80. Each sensing element 20 transmits a charge signal at a different timing. The sensing element 20 transmits a charge signal to the corneal surface of the eye 200 to be tested. Under the continuous action of the excitation signal, a charge polarization effect is immediately formed after the charge emission is completed, and the charge is gathered at the corneal center 210 of the eye 200 to be tested, and a negatively charged charge film is formed at the corneal center 210.

[0060] Optionally, each sensing element 20 is connected to the main control device 80 via a connecting line 25 , and the connecting line 25 may be a coaxial shielded cable to reduce external interference.

[0061] In some embodiments, the plurality of sensing elements 20 may be distributed at equal intervals, and the central angle formed between any two adjacent sensing elements 20 is the same. Exemplarily, the number of sensing elements 20 is preferably 4, and the four sensing elements 20 are distributed around the probe 10 at intervals of 90°. Alternatively, the number of sensing elements 20 may also be two, three or more. The present application does not limit the number of sensing elements 20. The sensing element 20 may include a non-magnetic material, such as copper.

[0062] Specifically, Figure 1 and Figure 2 As shown, the intraocular pressure monitoring device 100 further includes a circuit board 70 , each sensing element 20 is connected to the circuit board 70 via a connecting line 25 , and a main control device 80 is disposed on the circuit board 70 .

[0063] In one example, the distance information between the sensing element 20 and the corneal center 210 acquired by the main control device 80 may be a specific distance value, or other data that can represent the distance value, such as dielectric induction data. The present application does not limit the specific type of distance information.

[0064] In the embodiment of the present application, a plurality of sensing elements 20 are arranged on the ring b surrounding the probe 10, and the distance information between each sensing element 20 and the corneal center 210 is compared and analyzed to determine whether the probe 10 is in an aligned state. Due to the particularity of the distribution of the sensing elements 20, the judgment result is more accurate, which is conducive to improving the detection accuracy and precision of the intraocular pressure monitoring device 100 and improving the convenience of use.

[0065] In some embodiments, the main control device 80 is used to obtain dielectric induction data corresponding to each sensing element 20 according to the first sensing signal, and the dielectric induction data is used to represent the distance information between the sensing element 20 and the corneal center 210.

[0066] The dielectric induction data corresponding to the sensing element 20 may be data automatically calculated and output by the main control device 80 according to the first sensing signal received by the sensing element 20 and sent to the main control device 80. The main control device 80 may only output the dielectric induction data, but not the specific distance value.

[0067] Different sensing elements 20 receive different first sensing signals, and the corresponding dielectric induction data are also different. Therefore, the dielectric induction data can be used to represent the distance information between the sensing element 20 and the corneal center 210. Those skilled in the art can understand that the closer the distance between the conductor and the charged body is, the greater the amount of charge induced is, and the closer it is to the charge of the charged body.

[0068] Specifically, if the dielectric induction data corresponding to each sensing element 20 are the same, it means that the distances between each sensing element 20 and the corneal center 210 are equal, and at this time, the probe 10 is in an aligned state. If the dielectric induction data corresponding to the plurality of sensing elements 20 are not all the same, it means that the distances between each sensing element 20 and the corneal center 210 are not all the same, and at this time, the probe 10 is in a non-aligned state.

[0069] The embodiment of the present application uses dielectric induction data to characterize the distance information between the sensing element 20 and the corneal center 210, and does not need to calculate and analyze the actual distance between each sensing element 20 and the corneal vertex 210, thereby reducing calculation errors, simplifying the running program, and improving the judgment speed. At the same time, the calculation that relies on information processing eliminates errors caused by user dependence.

[0070] In other embodiments, the main control device 80 is used to obtain a first distance value corresponding to each sensing element 20 based on the first sensing signal, and the first distance value is used to characterize the distance information between the sensing element 20 and the corneal center 210, and the first distance value is the distance between the sensing element 20 and the corneal center 210.

[0071] The first distance value is the actual distance value between the sensing element 20 and the corneal center 210. The first distance value can be calculated by the main control device 80 according to the first sensing signal. The main control device 80 can directly output the first distance value.

[0072] If the first distance values ​​corresponding to the sensing elements 20 are the same, it means that the distances between the sensing elements 20 and the corneal center 210 are equal, and the probe 10 is in an aligned state. If the first distance values ​​corresponding to the plurality of sensing elements 20 are not all the same, it means that the distances between the sensing elements 20 and the corneal center 210 are not all the same, and the probe 10 is in a non-aligned state.

[0073] The embodiment of the present application represents the distance information between the sensing element 20 and the cornea center 210 by the actual distance between the sensing element 20 and the cornea center 210 , which is more direct and intuitive.

[0074] In some embodiments, the main control device 80 is used to calculate the distance between the sensing element 20 and the corneal center 210 according to the following formula:

[0075]

[0076] Wherein, d1 is the distance between the sensing element 20 and the corneal center 210, ε r is the vacuum dielectric constant, S1 is the projected area of ​​the sensing element 20 in a plane perpendicular to the axis a of the intraocular pressure monitoring device 100 , k is the electrostatic force constant, and c1 is the dielectric induction data corresponding to the sensing element 20 .

[0077] When the sensing element 20 is determined, the projection area of ​​the sensing element 20 in the plane perpendicular to the axis a of the intraocular pressure monitoring device 100 is determined, ε r , k and π are all constants, c1 is the dielectric induction data corresponding to the sensing element 20 output by the main control device 80, so the distance value between the sensing element 20 and the corneal vertex 210 can be calculated according to the above formula.

[0078] In some alternative embodiments, the distance between the sensing element 20 and the corneal apex 210 may also be calculated by other suitable methods.

[0079] In some other embodiments, the main control device 80 is used to obtain a second distance value corresponding to each sensing element 20 based on the first sensing signal, and the second distance value is used to characterize the distance information between the sensing element 20 and the corneal center 210. The second distance value is the distance between the projection point of the sensing element 20 in the reference plane d and the corneal center 210. The reference plane d is perpendicular to the axis a of the intraocular pressure monitoring device and passes through the corneal center 210.

[0080] When the probe 10 is in the aligned state, the plane where the ring b is located should be parallel to the reference plane d, the projection points of the multiple sensing elements 20 in the reference plane d should be on a ring with the corneal center 210 as the center, and the distances between the projection points of the multiple sensing elements 20 and the corneal center 210 should be equal. On the contrary, when the distances between the projection points of the multiple sensing elements 20 and the corneal center 210 are not all equal, it means that the probe 10 is in a misaligned state. It can be seen that the second distance value can also represent the distance information between the sensing element 20 and the corneal center 210.

[0081] The second distance value is the actual distance value between the projection point of the sensing element 20 in the reference plane d and the corneal center 210. The second distance value can be calculated by the main control device 80 according to the first sensing signal. The main control device 80 can directly output the second distance value.

[0082] In some embodiments, the intraocular pressure monitoring device 100 further includes a probe assembly 60, which is arranged along the axis a of the intraocular pressure monitoring device 100, and the probe 10 is installed in the probe assembly 60. The probe assembly 60 includes a probe barrel 62, and a ring b where the plurality of sensing elements 20 are located surrounds the probe barrel 62. The central axis of the probe barrel 62 may coincide with the axis a. The center of the ring b is located on the central axis of the probe barrel 62.

[0083] In some embodiments, the probe barrel 62 is used to transmit a charge signal to the cornea and receive a second sensing signal generated by the charge gathered at the cornea center 210. The probe barrel 62 can serve as another sensing channel of the intraocular pressure monitoring device 100.

[0084] In some embodiments, the probe barrel 62 may include non-magnetic materials, such as copper or aluminum. The probe barrel 62 of the embodiment of the present application uses non-magnetic copper or aluminum as the induction medium, and is fixed with insulating materials to effectively spread the electrostatic charge and ensure that the charge is evenly emitted to the cornea of ​​the eye 200 to be tested.

[0085] Furthermore, the intraocular pressure monitoring device 100 further includes a stylus 28 , and the probe tube 62 is electrically connected to the circuit board 70 via the stylus 28 , so as to reduce the distance measurement error caused by the lead wire and improve the measurement accuracy.

[0086] In some embodiments, the main control device 80 is further configured to calculate the distance d0 between the proximal end of the probe tube 62 and the corneal center 210 according to the second sensing signal in the aligned state.

[0087] The proximal end of the probe tube 62 is an end of the probe tube 62 close to the eye 200 to be tested.

[0088] After the probe 10 is aligned, the main control device 80 controls the probe tube 62 to transmit a charge signal to the cornea, and receives a second sensing signal generated by the charge gathered at the center 210 of the cornea through the probe tube 62 .

[0089] The intraocular pressure monitoring device 100 of the embodiment of the present application can, on the basis of achieving alignment between the probe 10 and the corneal center 210, also utilize dielectric induction technology to obtain the distance d0 between the proximal end of the probe tube 62 facing the eye 200 to be tested and the corneal center 210 in the aligned state, and then determine whether the distance between the probe 10 and the corneal center 210 is appropriate, so as to facilitate flexible adjustment, which is beneficial to improving the detection accuracy of the intraocular pressure monitoring device 100 and the user comfort.

[0090] The distance d0 between the proximal end of the probe tube 62 and the corneal center 210 calculated in the embodiment of the present application can also provide accurate data support for the corneal characteristic parameters of the eye 200 to be tested, the acceleration of the probe 10, etc., thereby improving the consistency and accuracy of each measurement result, while improving the usability of the intraocular pressure monitoring device 100, providing great convenience for medical staff to operate the equipment.

[0091] In some embodiments, the main control device 80 is used to obtain dielectric induction data corresponding to the probe cylinder 62 according to the second induction signal, and calculate the distance d0 between the proximal end of the probe cylinder 62 and the corneal center 210 according to the dielectric induction data corresponding to the probe cylinder 62.

[0092] The dielectric induction data corresponding to the probe cylinder 62 may be data automatically calculated by the main control device 80 according to the second induction signal received by the probe cylinder 62 and sent to the main control device 80. After the main control device 80 calculates the dielectric induction data corresponding to the probe cylinder 62, it does not directly output the dielectric induction data, but calculates the distance d0 between the proximal end of the probe cylinder 62 and the corneal center 210 according to the dielectric induction data, and then directly outputs the d0 value.

[0093] The embodiment of the present application uses dielectric induction data to calculate the distance between the proximal end of the probe tube 62 and the corneal center 210. The method for obtaining the dielectric induction data corresponding to the probe tube 62 is the same as the method for obtaining the dielectric induction data corresponding to the sensing element 20. The modules of the main control device 80 can be reduced and its calculation processing speed can be improved.

[0094] In some alternative embodiments, the distance d0 between the proximal end of the probe barrel 62 and the corneal center 210 may also be obtained by other suitable methods.

[0095] In some embodiments, the main control device 80 is used to calculate the distance between the proximal end of the probe tube 62 and the center of the cornea according to the following formula:

[0096]

[0097] Wherein, d0 is the distance between the proximal end of the probe tube 62 and the corneal center 210, ε r is the vacuum dielectric constant, S is the projected area of ​​the probe cylinder 62 in a plane perpendicular to the axis a of the intraocular pressure monitoring device 100 , k is the electrostatic force constant, and c is the dielectric induction data corresponding to the probe cylinder 62 .

[0098] When the probe cylinder 62 is determined, the projection area of ​​the probe cylinder 62 in the plane perpendicular to the axis a of the intraocular pressure monitoring device 100 is determined, ε r , k and π are all constants, c is the dielectric induction data corresponding to the probe cylinder 62 output by the main control device 80, so the distance d0 between the proximal end of the probe cylinder 62 and the corneal center 210 can be calculated according to the above formula.

[0099] The inventors have realized that the density of charges attached to the cornea depends on the dielectric constant of the cornea. The greater the dielectric constant, the greater the density of charges attached to the cornea. The density of charges attached to the cornea is related to the distance between the probe tube 62 and the cornea center 210.

[0100] Based on the above understanding, in some embodiments, the main control device 80 is also used to calculate the corneal dielectric constant of the eye 200 to be tested according to the distance between the proximal end of the probe tube 62 and the center of the cornea in the aligned state, and obtain the corneal thickness of the eye 200 to be tested according to the corneal dielectric constant of the eye 200 to be tested.

[0101] According to the inventor's research, corneal thickness will significantly affect the measurement of intraocular pressure, thereby affecting the classification and treatment of glaucoma. Corneal thickness is positively correlated with the possibility of suffering from glaucoma, and the thicker the cornea, the less the amount of accumulated charge and the smaller the corneal dielectric constant. The inventor obtained a correspondence table between dielectric constant and corneal thickness based on the empirical measurement results of different corneal thicknesses and dielectric constants, which is convenient for comparison according to the correspondence table between the two in actual measurement. For example, the normal corneal thickness is 0.5mm, and the measured corneal dielectric constant is 70; for another example, when the corneal thickness is 0.6mm, the measured corneal dielectric constant is 65; for another example, when the corneal thickness is 0.4mm, the measured corneal dielectric constant is 75.

[0102] Corneal thickness is an important feature of the cornea. It can be used to determine whether the eye to be tested has lesions, providing a basis for judging the health of the eye. In addition, users with different corneal thicknesses feel different pain from impact. In addition, corneal thickness can also provide data support for the needle acceleration of the probe 10, improve the consistency and accuracy of each measurement result, and at the same time improve the ease of use of the intraocular pressure monitoring device 100, providing great convenience for medical staff to operate the equipment.

[0103] In some embodiments, the main control device 80 is used to calculate the corneal dielectric constant of the eye 200 to be tested according to the following formula:

[0104]

[0105] Among them, ε1 is the dielectric constant of the cornea of ​​the eye 200 to be tested, k is the electrostatic force constant, c is the dielectric induction data corresponding to the probe tube 62 in the aligned state, d0 is the distance between the proximal end of the probe tube 62 and the center of the cornea in the aligned state, ε0 is the dielectric constant of the aqueous humor of the eye 200 to be tested, and S is the projection area of ​​the probe tube 62 in a plane perpendicular to the axis of the intraocular pressure monitoring device 100.

[0106] It should be noted that, when the dielectric constant of the aqueous humor of the eye 200 to be tested is unknown, ε0 can be regarded as the dielectric constant of the aqueous humor of the eye 200 to be tested under normal conditions, regardless of whether there is a lesion or other abnormal conditions in the aqueous humor of the eye 200 to be tested. Of course, ε0 can also be the dielectric constant of the aqueous humor of the eye 200 to be tested measured by other methods. Therefore, in the above calculation formula, ε0 is a constant or a known number.

[0107] In some embodiments, the main control device 80 is used to determine the target driving voltage of the probe 10 at the initial launch according to the distance between the proximal end of the probe barrel 62 and the corneal center and the corneal thickness in the aligned state, and drive the probe 10 to move along the axis a of the intraocular pressure monitoring device 100 according to the target driving voltage. The probe 10 is configured to move along the axis a of the intraocular pressure monitoring device 100 until it contacts the cornea of ​​the eye 200 to be tested, and then rebound in the opposite direction along the axis a of the intraocular pressure monitoring device 100.

[0108] In the aligned state, the distance d0 between the proximal end of the probe barrel 62 and the corneal center 210 affects the magnitude of the impact force of the probe 10 on the cornea. For example, when the probe 10 moves axially at the same acceleration, the smaller the distance d0, the greater the impact force on the cornea; the larger the distance d0, the smaller the impact force on the cornea. If the impact force of the probe 10 on the cornea is too large, it may cause discomfort to the patient's eyes or even damage the patient's cornea. If the impact force of the probe 10 on the cornea is too small, accurate detection data cannot be obtained, affecting the detection accuracy or causing invalid detection.

[0109] The different corneal thicknesses of the eye 200 to be tested may also affect the detection accuracy of the cornea by the probe 10 .

[0110] To this end, the embodiment of the present application determines the target driving voltage of the probe 10 for different corneal thicknesses and different corneal dielectric constants, so that the movement acceleration of the probe 10 along the axis a is adapted to the corneal thickness and corneal dielectric constant of the eye 2 to be tested, which is beneficial to improving the detection accuracy of the probe 10 and reducing the possibility of eye discomfort or damage to the patient's cornea.

[0111] Before implementation, the system can perform deep learning on corneal thickness, distance d0 and target driving voltage to form a data set or simulation curve, which is used to give a recommended target driving voltage after measuring corneal thickness and distance d0. Therefore, according to users with different corneal thicknesses and the distance d0 at the time of measurement, the appropriate impact force is provided to prevent measurement errors caused by excessive or insufficient impact force.

[0112] In some embodiments, the probe assembly 60 also includes a driving coil and a measuring coil (not shown in the figure). The driving coil is connected to the main control device 80 and is used to drive the probe 10 to move along the axis a of the intraocular pressure monitoring device 100 according to the target driving voltage. The measuring coil is arranged in the moving path of the probe 10 and is configured to generate current when the probe 10 rebounds through the measuring coil.

[0113] The driving coil and the measuring coil may be disposed between the coil support 64 and the outer cylinder 66 .

[0114] The working principles of the driving coil and the measuring coil are technologies that are easily acquired by those skilled in the art and will not be described in detail here.

[0115] In some embodiments, the main control device 80 is further used to determine the measured intraocular pressure value of the eye 200 to be tested according to the current generated by the measuring coil, and to correct the measured intraocular pressure value according to the corneal thickness to form a corrected intraocular pressure value of the eye 200 to be tested.

[0116] Optionally, the main control device 80 may obtain the corrected intraocular pressure value of the eye 200 to be tested according to the following correction formula:

[0117] A1=A2±(5×(w-520)) / 70;

[0118] Wherein, A1 is the corrected intraocular pressure value of the eye 200 to be tested, A2 is the measured intraocular pressure value of the eye 200 to be tested, and w is the corneal thickness of the eye 200 to be tested.

[0119] Those skilled in the art will appreciate that a variety of calculation methods may be used to correct the intraocular pressure value, and the present purpose can be achieved as long as the intraocular pressure value is corrected according to the corneal thickness.

[0120] The embodiment of the present application corrects the actually measured intraocular pressure value according to the corneal thickness calculated by the main control device 80 to obtain a corrected intraocular pressure value, thereby improving the accuracy of the intraocular pressure detection result.

[0121] In some embodiments, the intraocular pressure monitoring device 100 includes a display screen 71, which is used to display the difference in distance information between multiple sensing elements 20 and the corneal center 210, as well as at least one of the distance d0 between the proximal end of the probe tube 62 and the corneal center 210 in the aligned state, the corneal dielectric constant of the eye 200 to be tested, the corneal thickness of the eye 200 to be tested, and the corrected intraocular pressure value A1 of the eye 200 to be tested.

[0122] For example, Figure 6 As shown, the values ​​on the two orthogonal axes of the aperture displayed on the display screen 71 can represent the difference in distance information between the plurality of sensing elements 20 and the corneal center 210. For example Figure 6 The display interface on the left shows that the difference in distance information between the plurality of sensing elements 20 and the corneal center 210 is not zero, indicating that the probe 10 is in a non-aligned state; Figure 6 The display interface on the right shows that the difference in distance information between the plurality of sensing elements 20 and the corneal center 210 is zero, indicating that the probe 10 is in an aligned state.

[0123] In addition, on the display screen 71 , whether the probe 10 is in an aligned state can also be indicated by the color change of the aperture.

[0124] The d displayed on the display screen 71 is the d0 value, and the ε displayed on the display screen 71 is the corneal dielectric constant of the eye 200 to be tested.

[0125] In some embodiments, the main control device 80 is used to control the plurality of sensing elements 20 to individually emit charge signals according to different timing sequences.

[0126] For example, the main control device 80 may first control the first sensing element 20 to transmit a charge signal to the cornea of ​​the eye 200 to be tested, control the first sensing element 20 to stop transmitting the charge signal, and then control the second sensing element 20 to transmit a charge signal to the center of the cornea of ​​the eye 200 to be tested, and so on.

[0127] After stopping controlling the first sensing element 20 to transmit the charge signal, the first sensing element 20 can receive the first sensing signal generated by the charge gathered at the corneal center 210. The main control device 80 obtains the distance information between the first sensing element 20 and the corneal center 210 according to the first sensing signal received by the first sensing element 20. Similarly, the main control device 80 can sequentially obtain the distance information between each sensing element 20 and the corneal center 210.

[0128] The embodiment of the present application controls each sensing element 20 to transmit a charge signal to the cornea in a time-division manner according to different timing sequences, which can avoid mutual interference between the signals of each sensing element 20 and is beneficial to improving the accuracy and precision of the detection result.

[0129] In some embodiments, the main control device 80 includes a signal transmitting module 81 , a signal processing module 82 , a signal receiving module 83 and a control module 84 .

[0130] The signal transmitting module 81 is signal-connected to the control module 84 and each sensing element 20 . The signal transmitting module 81 is used to trigger each sensing element 20 to transmit a charge signal under the control of the control module 84 .

[0131] The signal receiving module 83 is signal-connected to the signal processing module 82 and each sensing element 20 . The signal receiving module 83 is used to receive the first sensing signal and send it to the signal processing module 82 .

[0132] The signal processing module 82 is signal-connected to the control module 84 and is configured to process the first sensing signal to form a first processing signal.

[0133] The control module 84 is used to send a control signal to each sensing element 20 through the signal transmission module 81 to prompt the sensing element 20 to send a charge signal to the cornea. The control module 84 is also used to obtain the distance information between each sensing element 20 and the corneal center 210 according to the first processing signal, and determine that the probe 10 is in an aligned state when the distance information indicates that the distances between each sensing element 20 and the corneal center 210 are equal.

[0134] In some embodiments, the signal transmitting module 81 and the signal receiving module 83 are also connected to the probe barrel 62 by signal, the signal transmitting module 81 is used to trigger the probe barrel 62 to transmit a charge signal under the control of the control module 84, and the signal receiving module 83 is used to receive the second sensing signal and send it to the signal processing module 82. The signal processing module 82 is used to process the second sensing signal to form a second processing signal. The control module 84 is also used to send a control signal to the probe barrel 62 through the signal transmitting module 81 to control the probe barrel 62 to transmit a charge signal to the cornea, and to calculate the distance between the proximal end of the probe barrel 62 and the corneal center 210 according to the second processing signal.

[0135] Optionally, the signal processing module 82 may include multiple signal processing units to perform various processing on each of the first sensing signal and the second sensing signal. Optionally, the signal processing module 82 may include an analog-to-digital conversion unit, a digital filtering unit, a signal processing unit, etc. The signal processing module 82 can perform analog-to-digital conversion on the first sensing signal and the second sensing signal to form a digital output, filter the digital output to remove various noise signals, and then perform a series of processing such as integration coding, time compression, and transmission protocol to finally generate effective dielectric induction data.

[0136] In some embodiments, the signal transmitting module 81 may include an excitation source and a signal transmitting unit. The signal processing module 82 may include a modulator, a digital filter or other units capable of processing signals. Since the working principle of the signal processing modules such as the modulator and the digital filter is easy to obtain technology for those skilled in the art, it will not be repeated here.

[0137] In some embodiments, the signal processing module 82 may be connected to the signal of the control module 84 via a data interface.

[0138] The embodiment of the present application integrates the signal transmitting module 81, the signal processing module 82, the signal receiving module 83 and the control module 84 into a main control device 80, which has a high degree of integration and can reduce signal interference, facilitating the direct use of data.

[0139] In some embodiments, the main control device 80 is further used to generate prompt information according to the distance deviation between the probe 10 and the center of the eyeball. Optionally, the prompt information can be voice prompt information, animation prompt information, screen prompt information, etc. For example, the prompt information can be voice information for indicating the adjustment direction. Figure 6 As shown, the prompt information is an aperture animation prompt.

[0140] According to the second aspect of the present application, an embodiment of the present application also provides a control method for the intraocular pressure monitoring device provided according to any embodiment of the present application. Figure 7 is a schematic flow chart of a control method of an intraocular pressure monitoring device provided in the first embodiment of the present application, with reference to Figure 7 , the control method provided in the embodiment of the present application includes:

[0141] Step S10, respectively controlling each sensing element 20 to transmit a charge signal to the cornea of ​​the eye 200 to be tested;

[0142] Step S20, receiving, through each sensing element 20, a first sensing signal emitted by the electric charge gathered on the corneal center 210 of the eye 200 to be tested;

[0143] Step S30, obtaining the distance information between each sensing element 20 and the corneal center 210 according to the first sensing signal received by each sensing element 20;

[0144] Step S40, judging whether the distances between each sensing element 20 and the corneal center 210 are equal according to the distance information between each sensing element 20 and the corneal center 210; if so, going to step S50; if not, going back to step S10 to resend the charge signal.

[0145] Step S50, determining that the intraocular pressure monitoring device 1 is in an aligned state.

[0146] Preferably, in step S10, each sensing element 20 can be controlled to emit a charge signal to the cornea of ​​the eye 200 to be tested in different time sequences, and each sensing element 20 corresponds to a sensing channel. Accordingly, in step S20, the first sensing signal of the sensing channel where each sensing element 20 is located is received in a time-sharing manner. The signals of the sensing channels where each sensing element 20 is located will not interfere with each other, which is conducive to improving the accuracy of the judgment of the alignment state.

[0147] It can be understood that the distance information obtained in step S30 is information that can characterize the distance between the sensing element 20 and the corneal center 210, which includes but is not limited to measured distance values, dielectric induction data or other digital signal values, etc., but all of them can characterize the distance between the sensing element 20 and the corneal center 210.

[0148] Figure 8 yes Figure 7 A schematic flow chart of determining whether the distances between each sensing element and the center of the cornea are equal. In some embodiments, referring to Figure 8 According to the distance information between each sensing element 20 and the corneal center 210, step S40 of determining whether the distances between each sensing element 20 and the corneal center 210 are equal may specifically include:

[0149] Step S41, acquiring dielectric induction data corresponding to the sensing element 20 according to the first sensing signal;

[0150] Step S42 determines whether the dielectric induction data corresponding to each sensing element 20 are the same; if so, go to step S43; if not, go to step S44;

[0151] Step S43, determining that the distances between each sensing element 20 and the corneal center 210 are equal; and

[0152] Step S44, determining that the distances between each sensing element 20 and the corneal center 210 are not completely equal.

[0153] In some other embodiments, step S40 of determining whether the distances between each sensing element 20 and the corneal center 210 are equal may also specifically include:

[0154] Acquire a first distance value corresponding to each sensing element 20 according to the first sensing signal; the first distance value is the distance between the sensing element 20 and the corneal center 210;

[0155] Determine whether the first distance values ​​corresponding to the sensing elements 20 are the same;

[0156] If yes, it is determined that the distances between each sensing element 20 and the corneal center 210 are equal;

[0157] If not, it is determined that the distances between each sensing element 20 and the corneal center 210 are not completely equal.

[0158] In some other embodiments, step S40 of determining whether the distances between each sensing element 20 and the corneal center 210 are equal may also specifically include:

[0159] Acquire a second distance value corresponding to each sensing element 20 according to the first sensing signal, the second distance value being the distance between the projection point of the sensing element 20 in the reference plane d and the corneal center 210, the reference plane d being perpendicular to the central axis of the probe 10 and passing through the corneal center 210;

[0160] Determining whether the second distance values ​​corresponding to the sensing elements 20 are the same;

[0161] If yes, it is determined that the distances between each sensing element 20 and the corneal center 210 are equal;

[0162] If not, it is determined that the distances between each sensing element 20 and the corneal center 210 are not completely equal.

[0163] Fig. 9 is a schematic flow chart of a control method of an intraocular pressure monitoring device provided in the second embodiment of the present application. In some embodiments, referring to Fig. 9 After step S50, the control method provided in the embodiment of the present application further includes:

[0164] Step S61, obtaining the distance between the proximal end of the probe tube 62 and the corneal center 210 in the aligned state;

[0165] Step S62, calculating the corneal dielectric constant of the eye 200 to be tested according to the distance between the proximal end of the probe cylinder 62 and the corneal center 210 in the aligned state; and

[0166] Step S63, obtaining the corneal thickness of the eye 2 to be tested according to the corneal dielectric constant of the eye 200 to be tested;

[0167] Step S64, determining a target driving voltage of the probe 10 according to the distance between the proximal end of the probe barrel 62 and the corneal center 210 and the corneal thickness in the aligned state; and

[0168] Step S65 , driving the probe 10 to move along the axis a of the intraocular pressure monitoring device 100 toward the direction approaching the eye 200 to be tested according to the target driving voltage.

[0169] It can be understood that step S61 is performed after step S50.

[0170] Fig.10 yes Fig. 9 In some embodiments, referring to Fig.10 The specific implementation of step S61 may include:

[0171] Step S611, in the aligned state, controlling the probe tube 62 to emit a charge signal to the cornea of ​​the eye 200 to be tested;

[0172] Step S612, receiving a second sensing signal emitted by the electric charge gathered at the cornea center 210 of the eye 200 to be tested through the probe tube 62;

[0173] Step S613, acquiring dielectric induction data corresponding to the probe cylinder 62 according to the second induction signal received by the probe cylinder 62; and

[0174] Step S614 , calculating the distance d0 between the proximal end of the probe cylinder 62 facing the eye 200 to be measured and the corneal center 210 according to the dielectric induction data corresponding to the probe cylinder 62 .

[0175] The distance d0 between the proximal end of the eye 200 to be tested and the corneal center 210 can be calculated by referring to the above formula, which will not be described in detail here.

[0176] In some embodiments, after step S65, the control method provided by the embodiment of the present application further includes:

[0177] After the probe 10 rebounds in the reverse direction, the current generated by the measuring coil is obtained;

[0178] Determine the measured intraocular pressure value of the eye 200 to be measured according to the current generated by the measuring coil;

[0179] The measured intraocular pressure value is corrected according to the corneal thickness to obtain a corrected intraocular pressure value of the eye 200 to be measured.

[0180] In summary, the present application utilizes dielectric induction technology to achieve objective judgment of the alignment and positioning of the probe and the center of the cornea, thereby eliminating the subjective dependence caused by the user's self-judgment and the measurement error caused thereby. Furthermore, by obtaining the corneal dielectric constant, the corneal thickness of the eye to be measured is obtained, and based on the corneal thickness and the distance between the end of the probe tube and the center of the cornea, the target driving voltage of the probe at the time of initial emission is controlled by the controller, thereby controlling the probe to impact the cornea with a suitable impact force, thereby improving the accuracy of the measurement without causing damage to the cornea. Finally, the obtained measured intraocular pressure value is corrected according to the corneal thickness to obtain a more accurate corrected intraocular pressure value, providing an objective detection basis for clinical diagnosis.

[0181] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An intraocular pressure monitoring device, characterized in that: include: A probe is arranged along the axis of the intraocular pressure monitoring device; A plurality of sensing elements are distributed at intervals on a ring surrounding the probe, the center of the ring is located on the axis, and the plane where the ring is located is perpendicular to the axis; each of the sensing elements is used to transmit a charge signal to the cornea and receive a first sensing signal generated by the charge gathered at the center of the cornea; as well as A main control device is connected to the signals of each of the sensing elements. The main control device is used to control the multiple sensing elements to individually transmit the charge signals according to different timings, and is also used to obtain the distance information between each of the sensing elements and the center of the cornea according to the first sensing signal, and determine that the probe is in an aligned state when the distance information indicates that the distances between each of the sensing elements and the center of the cornea are equal.

2. The intraocular pressure monitoring device according to claim 1, characterized in that: The main control device is used to obtain dielectric induction data corresponding to each of the sensing elements according to the first sensing signal, wherein the dielectric induction data is used to represent the distance information between the sensing element and the center of the cornea; or The main control device is used to obtain a first distance value corresponding to each of the sensing elements according to the first sensing signal, the first distance value is used to represent the distance information between the sensing element and the center of the cornea, and the first distance value is the distance between the sensing element and the center of the cornea; or The main control device is used to obtain a second distance value corresponding to each of the sensing elements according to the first sensing signal, the second distance value is used to characterize the distance information between the sensing element and the center of the cornea, the second distance value is the distance between the projection point of the sensing element in the reference plane and the center of the cornea, and the reference plane is perpendicular to the axis of the intraocular pressure monitoring device and passes through the center of the cornea.

3. The intraocular pressure monitoring device according to claim 1, characterized in that: The intraocular pressure monitoring device further comprises a probe assembly, the probe assembly is arranged along the axis of the intraocular pressure monitoring device, the probe is mounted on the probe assembly, the probe assembly comprises a probe barrel, and the ring where the multiple sensing elements are located surrounds the probe barrel; The probe barrel is used to transmit a charge signal to the cornea and receive a second sensing signal generated by the charge gathered at the center of the cornea; The main control device is further used to calculate the distance between the proximal end of the probe tube and the center of the cornea according to the second sensing signal in the aligned state.

4. The intraocular pressure monitoring device according to claim 3, characterized in that: The main control device is used to obtain dielectric induction data corresponding to the probe cylinder according to the second induction signal, and calculate the distance between the proximal end of the probe cylinder and the center of the cornea according to the dielectric induction data corresponding to the probe cylinder.

5. The intraocular pressure monitoring device according to claim 4, characterized in that: The main control device is used to calculate the distance between the proximal end of the probe barrel and the corneal center according to the following formula: Where, d0 is the distance between the proximal end of the probe barrel and the center of the cornea, ε r is the vacuum dielectric constant, S is the projected area of ​​the probe barrel in a plane perpendicular to the axis of the intraocular pressure monitoring device, k is the electrostatic force constant, and c is the dielectric induction data corresponding to the probe barrel.

6. The intraocular pressure monitoring device according to claim 3, characterized in that: The main control device is also used to calculate the corneal dielectric constant of the eye to be tested according to the distance between the proximal end of the probe tube and the corneal center in the aligned state, and to obtain the corneal thickness of the eye to be tested according to the corneal dielectric constant of the eye to be tested.

7. The intraocular pressure monitoring device according to claim 6, characterized in that: The main control device is used to calculate the corneal dielectric constant of the eye to be tested according to the following formula: Among them, ε1 is the dielectric constant of the cornea of ​​the eye to be tested, k is the electrostatic force constant, c is the dielectric induction data corresponding to the probe tube in the alignment state, d0 is the distance between the proximal end of the probe tube and the center of the cornea in the alignment state, ε0 is the dielectric constant of the aqueous humor of the eye to be tested, and S is the projection area of ​​the probe tube in a plane perpendicular to the axis of the intraocular pressure monitoring device.

8. The intraocular pressure monitoring device according to claim 6, characterized in that: The main control device is used to determine the target driving voltage of the probe during initial emission according to the distance between the proximal end of the probe barrel and the center of the cornea and the corneal thickness in the aligned state, and drive the probe to move along the axis of the intraocular pressure monitoring device according to the target driving voltage; The probe is configured to move along the axis of the intraocular pressure monitoring device until it contacts the cornea of ​​the eye to be tested and then rebound in the opposite direction along the axis of the intraocular pressure monitoring device.

9. The intraocular pressure monitoring device according to claim 8, characterized in that: The probe assembly further includes a driving coil and a measuring coil, wherein the driving coil is connected to the main control device and is used to drive the probe to move along the axis of the intraocular pressure monitoring device according to the target driving voltage, and the measuring coil is arranged in the moving path of the probe and is configured to generate a current when the probe rebounds and passes through the measuring coil; The main control device is also used to determine the measured intraocular pressure value of the eye to be measured according to the current generated by the measuring coil, and to correct the measured intraocular pressure value according to the corneal thickness to form a corrected intraocular pressure value of the eye to be measured.

10. The intraocular pressure monitoring device according to claim 1, characterized in that: The main control device includes a signal transmitting module, a signal processing module, a signal receiving module and a control module; The signal transmitting module is connected to the control module and each of the sensing elements by signal, and the signal transmitting module is used to trigger each of the sensing elements to transmit a charge signal under the control of the control module; The signal receiving module is connected to the signal processing module and each of the sensing elements, and the signal receiving module is used to receive the first sensing signal and send it to the signal processing module; The signal processing module is signal-connected to the control module, and is used to process the first sensing signal to form a first processing signal; The control module is used to send a control signal to each of the sensing elements through the signal transmitting module to prompt the sensing element to send a charge signal to the cornea; the control module is also used to obtain the distance information between each of the sensing elements and the center of the cornea according to the first processing signal, and determine that the probe is in an aligned state when the distance information indicates that the distances between each of the sensing elements and the center of the cornea are equal.

11. A control method for an intraocular pressure monitoring device according to any one of claims 1 to 10, characterized in that: include: Controlling each of the sensing elements to emit a charge signal to the cornea of ​​the eye to be tested in a time-sequential manner; Receiving, by each of the sensing elements, a first sensing signal generated by electric charges gathered at the center of the cornea of ​​the eye to be tested; Acquire the distance information between each of the sensing elements and the center of the cornea according to the first sensing signal; Determining whether the distances between each of the sensing elements and the center of the cornea are equal according to the distance information between each of the sensing elements and the center of the cornea; If so, it is determined that the probe is in an aligned state.

12. The control method according to claim 11, characterized in that: The determining whether the distances between each of the sensing elements and the center of the cornea are equal based on the distance information between each of the sensing elements and the center of the cornea is achieved by any of the following methods: Acquire dielectric induction data corresponding to each of the sensing elements according to the first sensing signal; determine whether the dielectric induction data corresponding to each of the sensing elements are the same; if so, determine that the distances between each of the sensing elements and the center of the cornea are equal; or Acquire a first distance value corresponding to each of the sensing elements according to the first sensing signal, the first distance value being the distance between the sensing element and the center of the cornea; determine whether the first distance values ​​corresponding to each of the sensing elements are the same; if so, determine that the distances between each of the sensing elements and the center of the cornea are equal; or According to the first sensing signal, a second distance value corresponding to each of the sensing elements is obtained, wherein the second distance value is the distance between the projection point of the sensing element in a reference plane and the center of the cornea, and the reference plane is perpendicular to the central axis of the probe and passes through the center of the cornea; it is determined whether the second distance values ​​corresponding to each of the sensing elements are the same; if so, it is determined that the distances between each of the sensing elements and the center of the cornea are equal.

13. The control method according to claim 11, characterized in that: The intraocular pressure monitoring device further comprises a probe assembly, the probe assembly is arranged along the axis of the intraocular pressure monitoring device, the probe is mounted on the probe assembly, the probe assembly comprises a probe barrel, and the ring where the multiple sensing elements are located surrounds the probe barrel; The control method further comprises: Acquiring the distance between the proximal end of the probe barrel and the center of the cornea in the aligned state; Calculating the corneal dielectric constant of the eye to be tested according to the distance between the proximal end of the probe barrel and the corneal vertex; and Acquire the corneal thickness of the eye to be tested according to the corneal dielectric constant of the eye to be tested; Determining a target driving voltage for initial firing of the probe according to the distance between the proximal end of the probe barrel and the corneal apex in the aligned state and the corneal thickness; and The probe is driven to move along the axis toward the direction approaching the eye to be tested according to the target driving voltage.

14. The control method according to claim 13, characterized in that: The probe assembly further includes a driving coil and a measuring coil, wherein the driving coil is used to drive the probe to move along the axis of the intraocular pressure monitoring device, the probe is configured to rebound along the axis of the intraocular pressure monitoring device after contacting the cornea of ​​the eye to be tested, and the measuring coil is used to generate current when the probe rebounds and passes through the measuring coil; The control method further comprises: After the probe rebounds in the opposite direction, obtaining the current generated by the measuring coil; Determining the measured intraocular pressure value of the eye to be measured according to the current generated by the measuring coil; The measured intraocular pressure value is corrected according to the corneal thickness to obtain a corrected intraocular pressure value of the eye to be measured.

15. The control method according to claim 13, characterized in that: The distance between the proximal end of the probe barrel and the center of the cornea in the aligned state is obtained by: In the aligned state, controlling the probe tube to emit a charge signal to the cornea of ​​the eye to be tested; receiving, through the probe tube, a second induction signal emitted by electric charges gathered on the cornea of ​​the eye to be tested; Calculating dielectric induction data corresponding to the probe cylinder according to the second induction signal; as well as The distance between the proximal end of the probe cylinder and the corneal apex is calculated according to the dielectric induction data corresponding to the probe cylinder.

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