Eye crack width calibration and calibration component

Abstract

The utility model provides a calibration and calibration component for the width of an eye crack, which comprises a push rod, a reflecting mirror, an eye corner clamping point, a clamping point fixing seat and an eye crack width calibration object assembly, and the eye crack width calibration object assembly is formed by assembling an eye crack width calibration object base and an eye crack width calibration object. The eye crack width calibration object is provided with an eyelid area simulating the width of the eye crack, the eye corner clamping point and the eye crack width calibration object assembly are connected through the clamping point fixing base, the clamping point fixing base is fixedly connected with the eye corner clamping point, the clamping point fixing base is movably connected with the eye crack width calibration object assembly, and the reflecting mirror is fixed to the front end of the eye corner clamping point. The push rod is arranged on one side of the eye crack width calibration object base, and the eye crack width calibration object of the eye crack width calibration object assembly is pushed towards the canthus clamping point through the push rod. According to the utility model, the eye crack width measured by the eye parameter evaluation device can be calibrated and calibrated.

Description

Technical Field

[0001] The utility model relates to the technical field of eye measurement, in particular to a component for marking and calibrating the width of an eye fissure. Background Art

[0002] Thyroid eye disease (TAO) is an inflammatory eye lesion caused by autoimmune thyroid disease, especially Graves' disease. Up to 20-50% of patients with abnormal thyroid function may suffer from this disease, which often occurs in the critical period of life between 30 and 50 years old, leading to obvious disfiguring changes in appearance and visual dysfunction, such as diplopia and vision loss. Patients have a strong desire to seek medical treatment. The current diagnosis of TAO follows the Barteley criteria established by George B. Barteley and Colum A. Gorman in 1995, as well as the latest TAO diagnosis and treatment guidelines in 2022. Thyroid-related eye disease can cause some clinical signs in patients, including eyelid retraction, proptosis, eye movement disorders and strabismus. Among them, eye movement disorders can make the patient's eyes unable to move freely.

[0003] Eyelid retraction is unique to thyroid eye disease and is also the most common sign, so the measurement of palpebral fissure width is very important. The existing measurement scheme is that doctors directly measure the patient with a ruler and read the distance between the upper eyelid edge and the lower eyelid edge through the center of the pupil as a quantitative indicator of palpebral fissure width. This method is too subjective, and it is difficult for the human eye to locate the center of the pupil, resulting in a larger error when reading the scale.

[0004] Based on the above needs, the applicant of this application proposed an eye parameter evaluation device (application number ZL202210989498.3), which can measure eyeball protrusion, eyeball mobility, conjunctival congestion and palpebral fissure width. At present, the main method process for testing the accuracy of the above eye parameter evaluation device in measuring palpebral fissure width is as follows:

[0005] The doctor asks the patient to relax and look into the distance in the first eye position (looking straight ahead) with a normal head position. When measuring, a ruler is used to measure the distance between the upper eyelid edge and the lower eyelid edge through the center of the pupil. The patient's palpebral fissure width value is recorded, and then the ophthalmologist uses an eye parameter evaluation device to measure the patient's palpebral fissure width and record the value. By comparing the two values, the accuracy of the eye parameter evaluation device is tested. This method has the following main defects: the current measurement method mainly relies on doctors to measure manually, the measurement process is complicated, requires a high degree of patient cooperation, and the difficulty in reading causes a large measurement error; the palpebral fissure width of real people has no real value, and the eye parameter evaluation device cannot be fed back and calibrated. Therefore, it is still necessary to find a better standard method to verify the measurement accuracy of the palpebral fissure width in the above-mentioned eye parameter evaluation device. Summary of the invention

[0006] In order to overcome the deficiency of the prior art that the measurement accuracy of the palpebral fissure width is not considered, the utility model proposes a palpebral fissure width calibration component and its calibration and calibration system. A calibration object and a fixed installation method for measuring the palpebral fissure width of the human eye are designed. The calibration object simulates the eyelid part of the human eye so that it can be automatically identified and calculated by the eye parameter evaluation device. The fixed installation method of the calibration object ensures stability during the measurement process. The palpebral fissure width calibration and calibration component is matched with the eye parameter evaluation device, and the calibration and calibration component is measured. The eye parameter evaluation device can be calibrated and calibrated using the measurement results.

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

[0008] A palpebral fissure width calibration and marking component comprises: a push rod, a reflector, an eye corner clamping point, a clamping point fixing seat, and an palpebral fissure width calibration object assembly, wherein the palpebral fissure width calibration object assembly is composed of an eye corner clamping point base and an eye corner clamping object, an eyelid area simulating the palpebral fissure width of a human eye is arranged on the palpebral fissure width calibration object, the eye corner clamping point and the palpebral fissure width calibration object assembly are connected via a clamping point fixing seat, the clamping point fixing seat is fixedly connected to the eye corner clamping point, the clamping point fixing seat is movably connected to the palpebral fissure width calibration object assembly, the reflector is fixed to the front end of the eye corner clamping point, the push rod is arranged on one side of the palpebral fissure width calibration object base, and the palpebral fissure width calibration object of the palpebral fissure width calibration object assembly is pushed toward the eye corner clamping point via the push rod.

[0009] Furthermore, the palpebral fissure width calibration object assembly is composed of a palpebral fissure width calibration object base and a palpebral fissure width calibration object adsorbed by a magnet.

[0010] Furthermore, the canthus card point has a hollow cavity, and a pressure sensor is arranged in the hollow cavity of the canthus card point. When the palpebral fissure width calibration object of the palpebral fissure width calibration object assembly is pushed toward the canthus card point by a push rod, the pressure sensor is used to monitor the pressure value.

[0011] Furthermore, the eyelid area set on the palpebral fissure width calibration object includes a simulated human upper eyelid, a simulated human pupil, and a simulated human lower eyelid.

[0012] Furthermore, the palpebral fissure width calibration and calibration component also includes a pin shaft, the card point fixing seat has a U-shaped seat body, the U-shaped seat body is fixed to the eye corner card point by screws, and the palpebral fissure width calibration base also includes a connecting rod, and the connecting rod is movably connected to the waist of the U-shaped seat body by a pin shaft.

[0013] Furthermore, the palpebral fissure width calibrator is a replaceable part, and different palpebral fissure width calibrators have different palpebral fissure width values ​​of the eyelid area that simulate the palpebral fissure width of a human eye, and the palpebral fissure width value is marked on the palpebral fissure width calibrator.

[0014] The utility model also includes a palpebral fissure width calibration and marking system, characterized in that it includes an eye parameter evaluation device and the palpebral fissure width calibration and marking component, wherein the palpebral fissure width calibration and marking component is used to cooperate with the eye parameter evaluation device to calibrate and mark the palpebral fissure width.

[0015] The technical solution of the utility model has the following beneficial effects:

[0016] 1. By combining the calibration and calibration components of the palpebral fissure width with the eye parameter evaluation device in the prior art, replacing the actual human eye in the eye parameter evaluation device with the palpebral fissure width calibration object, the eye parameter evaluation device is used to capture images and perform calculations to obtain the value of the palpebral fissure width, and the calibration value of the palpebral fissure width of the calibration object is compared with the calibration value of the palpebral fissure width of the third-party metrology institute in advance 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 can be easily replaced by magnetic attraction, and the measurement accuracy of different palpebral fissure widths can be calibrated.

[0017] 2. The push rod pushes the calibration and calibration components of the eye fissure width to make them contact with the reflector, thereby simulating the contact measurement during the eye fissure width measurement process. 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 tight installation and protect the equipment from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 An exploded view of the calibration and calibration components for the eye cleft width in the utility model;

[0019] Figure 2 A schematic diagram of an eye fissure width calibration object with different eye fissure width values ​​in the present invention;

[0020] Figure 3 It is an assembly diagram of the calibration and calibration components of the eye cleft width in the utility model;

[0021] Figure 4 It is a structural diagram of the eye fissure width calibration object of the utility model. DETAILED DESCRIPTION

[0022] 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.

[0023] like Figure 1-4 As shown, the utility model provides a calibration and calibration component for palpebral fissure width, including: a push rod 10, a pin 11, a reflector 12, an eye corner clamping point 13, a clamping point fixing seat 14, a palpebral fissure width calibration base 15, a magnet 16, a palpebral fissure width calibration object 17, a simulated human upper eyelid 171; a simulated human pupil 172; a simulated human lower eyelid 173; a screw 18, and a screw 19. The palpebral fissure width calibration object assembly is composed of the palpebral fissure width calibration object base 15 and the palpebral fissure width calibration object 17, and the two are connected by a magnet 16. The palpebral fissure width calibration object 17 includes: Figure 2 The replaceable calibration objects shown in the figure are replaceable in that the values ​​of the palpebral fissure width are different, such as the palpebral fissure width values ​​of 5, 10, 15, 20, etc. The span of the palpebral fissure width values ​​of different calibration objects is usually 5. The palpebral fissure width value is marked on the palpebral fissure width calibration object, such as Figure 2 and Figure 4 As shown. The eye fissure width calibration object base 15 and the eye fissure width calibration object 17 are adsorbed and connected by a magnet 16, so that replacement is simple and reliable. The eye corner clamping point 13 and the eye fissure width calibration object base 15 are connected by a clamping point fixing seat 14. The eye corner clamping point 13 is a long arm-shaped member with a hollow cavity. The clamping 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 clamping point 13 by screws 18, and the longer screws 19 are used to tighten the open end of the U-shaped seat body. The clamping point fixing seat 14 is connected to the eye fissure width calibration object base 15 through a pin 11. There are connecting rods on both sides of the eye fissure width calibration object base 15. The connecting rods are provided with through holes. The through holes are inserted into the slots on 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. The reflector 12 is fixed to the front end of the eye corner clamping point 13. The fixing method can be selected from bonding, clamping, screw connection, etc.

[0024] In order to ensure the tight fit of the calibration object assembly 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 eye fissure width calibration object 17 of the eye fissure width calibration object assembly 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.

[0025] The above-mentioned palpebral fissure width calibration and calibration component cooperates with the eye parameter evaluation device to calibrate and calibrate the palpebral fissure width, which can completely simulate the measurement process of real people, thereby obtaining a palpebral fissure width calibration and calibration system for calibrating and calibrating the palpebral fissure width. Specifically, the eye corner clamping 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 with the palpebral fissure width calibration and calibration component of the utility model, the eye corner clamping point 13 in the palpebral fissure width calibration and calibration component is used to replace the eye corner clamping point in the eye parameter evaluation device, and the reflector 12 in the palpebral fissure width calibration and calibration component is used to replace the reflector in the eye parameter evaluation device, and the palpebral fissure width calibration object 17 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 palpebral fissure width measured by the eye parameter evaluation device using the palpebral fissure width calibration and calibration components, the eye corner card point 13, the reflector 12 and the eye corner card point and the reflector in the eye parameter evaluation device should be consistent in size and angle, and the reference surface of the palpebral fissure width calibration object 17 should be parallel to the eye parameter evaluation device when the push rod 10 pushes the palpebral fissure width calibration object assembly into place. After the palpebral fissure width calibration and calibration components are replaced with the relevant components in the eye parameter evaluation device, the measurement principle of the palpebral fissure width is exactly the same as the measurement principle described in the eye parameter evaluation device in the aforementioned application.

[0026] Below we explain the calibration and calibration principle of the utility model through a specific calibration and calibration process:

[0027] 1. First, the tester installs the eye crack width calibration object base 15, the magnet 16, and the eye crack width calibration object 17 to form an eye crack width calibration object. Figure 3 As shown, it is installed and fixed in the above manner so that the side simulating the eyelid of a human eye faces the eye parameter evaluation device.

[0028] 2. Make the palpebral fissure width calibration object fully visible on the screen of the eye parameter evaluation device, and select the palpebral fissure width measurement index.

[0029] 3. Test and adjust the distance of the eye corner card point in the eye parameter evaluation device, push the palpebral fissure width calibration object toward the device through the push rod 10, observe the pressure change of the eye corner card point 13 in the eye parameter evaluation device during this process, and click the measurement button in the eye parameter evaluation device when the pressure value is constant.

[0030] 4. The eye parameter evaluation device collects images of the calibration object, and automatically calculates the palpebral fissure width value of the palpebral fissure width calibration object after the collection is completed.

[0031] 5. Repeat steps 3 and 4 to measure the palpebral fissure width three times, and take the average value of the three times as the palpebral fissure width value of the palpebral fissure width calibration object measured by the eye parameter evaluation device.

[0032] 6. The measured value of the palpebral fissure width calibration object 17 is used as the gold standard, and compared with the palpebral fissure width value measured in the above step 5 to calibrate the measurement accuracy of the equipment.

[0033] 7. The measured value of the eye cleft width calibration object 17 in the above step 6 is measured by a third-party metrology institute at the opening of the eye cleft, and a measurement report is issued based on the measured data.

[0034] 8. Compare the palpebral fissure width measured by the device with the measured value of the palpebral fissure width calibration object 17. When the difference between the two values ​​is greater than 0.3 mm, it indicates that there is a deviation in the structural assembly or parameter setting of the eye parameter evaluation device, and its parameters need to be calibrated.

[0035] 9. During calibration, the parameters in the eye parameter evaluation device need to be recalculated and confirmed, such as: the internal calibration parameters of the camera; the motor position of the eye corner card point; whether the structural assembly error is too large, etc.

[0036] 10. After reconfirming and calculating the parameters of the eye parameter evaluation device, the latest parameters are applied to the eye parameter evaluation device and the palpebral fissure width calibration object is measured again.

[0037] 11. Repeat steps 3, 4, and 5 above to obtain the value of the palpebral fissure width calibration object, and compare this value with the measured value again.

[0038] 12. When the error between the measured value and the metered value is within 0.3 mm, it indicates that the measurement accuracy of the eye parameter evaluation device can meet the requirements, and the calibration process is completed.

[0039] 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 width of the eyelid fissure, It is characterized in that The calibration and marking components include: a push rod (10), a reflector (12), an eye corner clamping point (13), a clamping point fixing seat (14), and an eye fissure width calibration object assembly, wherein the eye fissure width calibration object assembly is composed of an eye fissure width calibration object base (15) and an eye fissure width calibration object (17) adsorbed by a magnet (16), a simulated eyelid region is set on the eyelid width calibration object (17), and the eye fissure width value of the eyelid region is displayed on the eye fissure width calibration object (17), and the eye fissure width calibration object (17) is fixed by the clamping point. The seat (14) connects the eye corner clamping point (13) and the eye fissure width calibration object assembly, the clamping point fixing seat (14) is fixedly connected to the eye corner clamping point (13), the clamping point fixing seat (14) is movably connected to the eye fissure width calibration object assembly, the reflector (12) is fixed to the front end of the eye corner clamping point (13), the push rod (10) is arranged on one side of the eye fissure width calibration object base (15), and the eye fissure width calibration object (17) of the eye fissure width calibration object assembly is pushed toward the eye corner clamping point (13) by the push rod (10).

2. The component for determining and calibrating the width of the palpebral fissure according to claim 1, It is 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 palpebral fissure width calibration object (17) of the palpebral fissure width calibration object assembly 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 palpebral fissure width calibration component according to claim 1, It is characterized in that The eyelid region provided on the palpebral fissure width calibration object (17) comprises a simulated human upper eyelid (171), a simulated human pupil (172), and a simulated human lower eyelid (173).

4. The palpebral fissure width calibration component according to claim 1, It is characterized in that The palpebral fissure width calibration object (17) is a replaceable part. Different palpebral fissure width calibration objects (17) have different palpebral fissure width values ​​for the simulated eyelid region. The palpebral fissure width value is marked on the palpebral fissure width calibration object (17).

5. The component for marking and calibrating the width of the palpebral fissure according to claim 1 or 2, It is characterized in that The palpebral fissure width calibration and marking 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 (18, 19); the palpebral fissure width calibration object base (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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