Calibration component for conjunctival congestion degree

Abstract

The utility model discloses a calibration and calibration component for the conjunctival congestion degree, which comprises a push rod, a reflecting mirror, an eye corner clamping point, a clamping point fixing seat and a conjunctival congestion calibration object, one surface of the conjunctival congestion calibration object is a plane for simulating the sclera of a human eye, and the other surface of the conjunctival congestion calibration object is a plane for simulating the sclera of a human eye. The plane is composed of a red area simulating conjunctival congestion, a white normal sclera area and an interference area, the canthus clamping points and the conjunctival congestion calibration object are connected through the clamping point fixing base, the clamping point fixing base is fixedly connected with the canthus clamping points and movably connected with the conjunctival congestion calibration object, the reflecting mirror is fixed to the front ends of the canthus clamping points, and the reflecting mirror is fixed to the front end of the conjunctival congestion calibration object. The push rod is arranged on the opposite side of the plane, simulating the human eye sclera, of the conjunctival congestion calibration object, and the plane, simulating the human eye sclera, of the conjunctival congestion calibration object is pushed towards the canthus clamping point through the push rod. According to the utility model, the conjunctival congestion degree measured by the eye parameter evaluation device can be calibrated.

Description

Technical Field

[0001] The utility model relates to the technical field of eye measurement, in particular to a demarcation and calibration component for conjunctival hyperemia. Background Art

[0002] Thyroid-associated ophthalmopathy (TAO) is an orbital inflammation caused by an autoimmune reaction. Its clinical features include eyelid retraction, proptosis, soft tissue inflammation, ocular motility disorders, and strabismus. The disease not only causes eye pain, discomfort, and visual impairment, but may also cause disfigurement and lead to psychological problems. The onset of thyroid-associated ophthalmopathy is usually insidious, occasionally acute, and has a long onset period and diverse symptoms. Currently, there is no biochemical, immunological, or other blood test that can identify the disease, and diagnosis mainly relies on clinical evaluation.

[0003] How to objectively evaluate and improve the symptoms of patients with thyroid eye disease, how to perform early screening and long-term disease tracking, and how to correctly diagnose and treat thyroid-related diseases have become difficult problems faced by endocrinologists. Clinically, doctors are required to be within 1 meter of the patient and judge the degree of conjunctival congestion based on their manual experience. Due to the subjective consciousness of different doctors, there is no unified standard for judging mild, moderate, and severe, which can easily lead to misdiagnosis and missed diagnosis. The different conditions of patients can also cause doctors to make deviations in their judgments.

[0004] The prior art discloses a TAO activity assessment device with a main body and measurement software for collecting eye characteristics of patients with thyroid-related eye diseases. The device measures four index parameters, namely, eyeball protrusion, eyeball mobility, palpebral fissure width, and conjunctival congestion percentage. The device provides doctors with effective references in the diagnosis and treatment stage through the changing values ​​of eyeball protrusion and mobility of TAO patients at different stages, and smoothly connects with the doctor's diagnosis and treatment process to assist doctors in making standardized assessments of TAO disease stages. Among them, the degree of conjunctival congestion is one of the important reference indicators for doctors to evaluate inflammation in patients' eyes.

[0005] In addition, the applicant previously proposed an eye parameter evaluation device (application number ZL202210989498.3), which can measure eyeball protrusion, eyeball mobility, conjunctival congestion and palpebral fissure width. However, the measurement accuracy of conjunctival congestion in the above eye parameter evaluation device needs to be verified. Summary of the invention

[0006] In order to overcome the deficiency of the prior art that the measurement accuracy of the degree of conjunctival congestion is not taken into account, the utility model proposes a conjunctival congestion degree calibration and calibration component and its system. A calibration object and a fixed installation method for measuring the degree of conjunctival congestion of the human eye are designed. The calibration object simulates the sclera part of the human eye so that it can be automatically identified and calculated. The fixed installation method of the calibration object ensures stability during the measurement process. The calibration and calibration component of the conjunctival congestion degree is matched with the eye parameter evaluation device, and the calibration and calibration component is measured. The measurement results can be used to calibrate and calibrate the eye parameter evaluation device.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A conjunctival congestion degree calibration and calibration component, the calibration and calibration component comprising: a push rod, a reflector, an eye corner card point, a card point fixing seat, and a conjunctival congestion calibration object, wherein one side of the conjunctival congestion calibration object is a plane simulating the human eye sclera, the plane is composed of a red area simulating conjunctival congestion, a white normal sclera area, and an interference area, the eye corner card point and the conjunctival congestion calibration object are connected by a card point fixing seat, the card point fixing seat is fixedly connected to the eye corner card point, the card point fixing seat is movably connected to the conjunctival congestion calibration object, the reflector is fixed to the front end of the eye corner card point, the push rod is arranged on the opposite side of the plane simulating the human eye sclera of the conjunctival congestion calibration object, and the plane simulating the human eye sclera of the conjunctival congestion calibration object is pushed toward the eye corner card point by the push rod.

[0009] Furthermore, the color of the interference area consists of pink and brown.

[0010] Furthermore, the eye corner card point has a hollow cavity, and a pressure sensor is arranged in the hollow cavity of the eye corner card point. When the plane of the conjunctival congestion calibration object simulating the human eye sclera is pushed toward the eye corner card point by a push rod, the pressure sensor is used to monitor the pressure value.

[0011] Furthermore, the conjunctival congestion degree calibration and calibration component also includes a pin, the card point fixing seat has a U-shaped seat body, and the U-shaped seat body is fixed to the eye corner card point by a screw. The conjunctival congestion calibration object also includes a connecting rod, and the connecting rod is movably connected to the waist of the U-shaped seat body by a pin.

[0012] Furthermore, the conjunctival hyperemia calibration object is a replaceable part, and the area of ​​the red region simulating conjunctival hyperemia of different conjunctival hyperemia calibration objects accounts for different proportions of the area of ​​the plane.

[0013] The utility model also includes a conjunctival congestion degree calibration and calibration system, including an eye parameter evaluation device and the aforementioned conjunctival congestion degree calibration and calibration component, the conjunctival congestion degree calibration and calibration component is used to cooperate with the eye parameter evaluation device to calibrate and calibrate the conjunctival congestion degree.

[0014] The technical solution of the utility model has the following beneficial effects:

[0015] 1. By combining the calibration and calibration components of the conjunctival congestion degree with the eye parameter evaluation device in the prior art, replacing the actual human eye in the eye parameter evaluation device with the conjunctival congestion calibration object, the eye parameter evaluation device is used to capture images and perform calculations to obtain the numerical value of the conjunctival congestion degree, and the calibration value of the conjunctival congestion degree of the calibration object is compared with the calibration value of the conjunctival congestion degree of the calibration object in advance by a third-party metrology institute to determine whether the measurement accuracy of the eye parameter evaluation device meets the requirements, thereby calibrating the measurement accuracy of the eye parameter evaluation device to ensure the accuracy in subsequent actual measurements. The calibration object is replaceable and can be used to calibrate the measurement accuracy of different conjunctival congestion degrees.

[0016] 2. The push rod pushes the calibration and calibration components of the conjunctival congestion degree to make them contact with the reflector, thereby simulating the contact measurement during the measurement of the conjunctival congestion degree. Since a pressure sensor is set in the hollow cavity of the eye corner card point, the pressure sensor is used to monitor the matching clearance of the equipment, which can ensure a tight installation and protect the equipment from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 An exploded view of the demarcation and calibration components for the degree of conjunctival hyperemia in the utility model;

[0018] Figure 2 It is a schematic diagram of the conjunctival hyperemia calibration object with different hyperemia degrees in the utility model;

[0019] Figure 3 This is an assembly diagram of the demarcation and calibration components for the conjunctival hyperemia degree in the present invention. DETAILED DESCRIPTION

[0020] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0021] like Figure 1-3 As shown, the utility model provides a conjunctival congestion degree calibration and calibration component, including: a push rod 10, a pin 11, a reflector 12, an eye corner card point 13, a card point fixing seat 14, a conjunctival congestion calibration object 15, a screw 16, a screw 17, and the conjunctival congestion calibration object 15 includes the following Figure 2The interchangeable markers shown are interchangeable, and the interchangeability refers to different degrees of conjunctival hyperemia. Figure 2 As shown, the conjunctival congestion calibration object 15 is a square structure with connecting rods on both sides. The eye corner card point 13 and the conjunctival congestion calibration object 15 are connected through the card point fixing seat 14. The eye corner card point 13 is a long arm-shaped component with a hollow cavity. The card point fixing seat 14 contains a U-shaped seat body. The two arms of the U-shaped seat body are connected to the cavity of the eye corner card point 13 through screws 16. The long screw 17 is used to tighten the open end of the U-shaped seat body. The card point fixing seat 14 is connected to the conjunctival congestion calibration object 15 through a pin 11. The connecting rod of the calibration object is provided with a through hole, which is inserted into the slot at the waist of the U-shaped seat body. The pin 11 penetrates the through holes on the U-shaped seat body and the connecting rod to connect the two. When the calibration object needs to be replaced, it is only necessary to remove the pin 11 and pull out the connecting rod. The reflector 12 is fixed to the front end of the eye corner card point 13. The fixing method can be selected from bonding, clamping, screw connection, etc. The calibration object 15 has a plane simulating the sclera of the human eye, and the plane is composed of a red area simulating conjunctival congestion, a white normal sclera area, and an interference area composed of purple and brown. The calibration object is replaceable, and the area of ​​the red area simulating conjunctival congestion of different conjunctival congestion calibration objects has a different proportion in the area of ​​the plane. In this embodiment, the position of each area of ​​the plane is not limited. For example, the red area simulating conjunctival congestion can be located in the middle of the plane or in other positions of the plane, as long as the ratio requirement of the area to the plane is met. In order to ensure the tight fit of the calibration object and the eye corner clamping point 13, and to protect the device from excessive compression, a pressure sensor is set in the hollow cavity of the eye corner clamping point 13. The position of the pressure sensor should be close to the contact position between the connecting rod and the eye corner clamping point 13 and an interface for electrical connection with the eye parameter evaluation device is reserved. When the plane side of the conjunctival congestion calibration object 15 is pushed toward the eye corner clamping point 13 by the push rod 10, the pressure sensor is used to monitor the pressure value. When there is no contact, the pressure value is zero. When the pressure value tends to be constant, it means that the assembly is in place. If the pressure value continues to increase, it means that the pressure is too tight, which is easy to damage the device. Therefore, the push of the push rod 10 is stopped when the pressure value is constant. In this embodiment, the power device of the push rod 10 is not limited. In fact, the push rod 10 can be pushed by various methods such as electric, pneumatic, and hydraulic, as long as the assembly can be achieved and the position relationship can be maintained.

[0022] The above-mentioned conjunctival congestion degree calibration and calibration component cooperates with the eye parameter evaluation device to calibrate and calibrate the conjunctival congestion degree, which can completely simulate the measurement process of real people, thereby obtaining a conjunctival congestion degree calibration and calibration system for calibrating and calibrating the conjunctival congestion degree. Specifically, the eye corner card point used to fix the outer canthus point of the eye corner and the reflector matched therewith in the eye parameter evaluation device are first removed, and replaced by the conjunctival congestion degree calibration and calibration component of the utility model, the eye corner card point 13 in the conjunctival congestion degree calibration and calibration component is used to replace the eye corner card point in the eye parameter evaluation device, and the reflector 12 in the conjunctival congestion degree calibration and calibration component is used to replace the reflector in the eye parameter evaluation device, and the conjunctival congestion calibration object 15 is used to simulate the real human eye in the eye parameter evaluation device. In order to ensure the accuracy of the calibration and calibration of the conjunctival congestion degree measured by the eye parameter evaluation device using the above-mentioned conjunctival congestion degree calibration and calibration components, the consistency of the size and angle of the eye corner card point 13 and the reflector 12 with the eye corner card point and the reflector in the eye parameter evaluation device should be ensured, and the reference surface of the conjunctival congestion calibration object 15 should be parallel to the eye parameter evaluation device when the push rod 10 pushes the conjunctival congestion calibration object 15 into place. After the conjunctival congestion degree calibration and calibration components replace the relevant components in the eye parameter evaluation device, the measurement principle of the conjunctival congestion degree is exactly the same as the measurement principle described in the eye parameter evaluation device in the aforementioned application.

[0023] Below we explain the calibration and calibration principles of the present invention through a specific calibration and calibration process:

[0024] 1. First, the tester installs and fixes the conjunctival congestion calibration object 15 in the above manner, so that the side simulating the human eye sclera faces the eye parameter evaluation device.

[0025] 2. Make the conjunctival congestion calibration object fully visible on the screen of the eye parameter evaluation device, and select the conjunctival congestion measurement index.

[0026] 3. Test and adjust the distance of the eye corner card point in the eye parameter evaluation device, push the conjunctival congestion calibration object 15 toward the device through the push rod 10 of the device, observe the pressure change of the eye corner card point 13 in the eye parameter evaluation device during this process, and when the pressure value is constant, click the conjunctival congestion measurement button in the eye parameter evaluation device.

[0027] 4. The eye parameter evaluation device collects images of the conjunctival congestion calibration object, and after the collection is completed, it will automatically calculate the area percentage value of the conjunctival congestion calibration object in the area.

[0028] 5. Repeat steps 3 and 4 above to measure the calibration object three times, and take the average value of the three times as the conjunctival congestion percentage value of the conjunctival congestion calibration object measured by the eye parameter evaluation device.

[0029] 6. The measured value of the conjunctival hyperemia calibration object 15 is used as the gold standard, and compared with the conjunctival hyperemia value measured in the above step 5 to calibrate the measurement accuracy of the device.

[0030] 7. The measured value of the conjunctival hyperemia calibration object 15 in step 6 is measured by a third-party metrology institute, where the area of ​​the simulated human eye sclera is measured as A, and the area of ​​the simulated conjunctival hyperemia is measured as B; after the measurement is completed, the percentage of the value of A / B is calculated as C%, and C% is the measured value of conjunctival hyperemia. Figure 2 Shown are calibrants with conjunctival hyperemia percentages of 50% and 25%, respectively, and a measurement report is issued for the measured data of the calibrants.

[0031] 8. Compare the conjunctival congestion value measured by the device with the measured value of the conjunctival congestion calibration object 15. When the difference between the two values ​​is greater than 3%, it indicates that there is a deviation in the parameter setting of the eye parameter evaluation device or the light field environment, and its parameters need to be calibrated.

[0032] 9. During calibration, it is necessary to recalculate and confirm the parameters in the eye parameter evaluation device and re-adjust the light field environment, for example: the internal calibration parameters of the camera; whether the camera exposure and white balance parameters are set reasonably; whether the light field environment is too bright or too dark, etc.

[0033] 10. After re-analyzing and adjusting the parameters of the eye parameter evaluation device, the latest parameters and light field environment are applied to the eye parameter evaluation device, and the conjunctival congestion calibration object is measured again.

[0034] 11. Repeat steps 3 and 4 above to obtain the numerical value of the conjunctival congestion degree of the conjunctival congestion calibration object, and compare the numerical value with the measured value again.

[0035] 12. When the error between the measured value and the metered value is within 3%, it indicates that the measurement accuracy of the eye parameter evaluation device can meet the requirements, and the calibration process is completed.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A component for calibrating and calibrating the degree of conjunctival hyperemia, characterized in that: The calibration and marking components include: a push rod (10), a reflector (12), an eye corner card point (13), a card point fixing seat (14), and a conjunctival congestion calibration object (15), wherein one side of the conjunctival congestion calibration object (15) is a plane simulating the sclera of a human eye, and the plane includes an area simulating conjunctival congestion, a normal sclera area, and an interference area, and the eye corner card point (13) and the conjunctival congestion calibration object (15) are connected via the card point fixing seat (14). The card point fixing seat (14) is fixedly connected to the eye corner card point (13), the card point fixing seat (14) is movably connected to the conjunctival congestion calibration object (15), the reflector (12) is fixed to the front end of the eye corner card point (13), the push rod (10) is arranged on the opposite side of the plane of the conjunctival congestion calibration object (15) simulating the human eye sclera, and the plane of the conjunctival congestion calibration object (15) simulating the human eye sclera is pushed toward the eye corner card point (13) by the push rod (10).

2. The component for calibrating and calibrating the degree of conjunctival hyperemia according to claim 1, characterized in that: The eye corner clamping point (13) has a hollow cavity, and a pressure sensor is arranged in the hollow cavity of the eye corner clamping point (13). When the plane of the simulated human eye sclera of the conjunctival congestion calibration object (15) is pushed toward the eye corner clamping point (13) by the push rod (10), the pressure sensor is used to monitor the pressure value.

3. The demarcation and calibration component for conjunctival hyperemia according to claim 1, characterized in that: The conjunctival congestion calibration object (15) is a replaceable part. The area of ​​the region simulating conjunctival congestion of different conjunctival congestion calibration objects (15) accounts for different proportions of the area of ​​the plane, and the proportions are calibrated in advance by a third-party metrology institute.

4. The demarcation and calibration component for conjunctival hyperemia according to claim 1 or 2, characterized in that: The conjunctival congestion degree calibration and calibration component further comprises a pin (11); the card point fixing seat (14) comprises a U-shaped seat body, the U-shaped seat body is fixed to the eye corner card point (13) via screws (16, 17); the conjunctival congestion calibration object (15) further comprises a connecting rod, the connecting rod is movably connected to the waist of the U-shaped seat body via the pin (11).

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