Eyeball motion range calibration and calibration component and calibration and calibration method

Abstract

The invention discloses an eyeball motion range calibration and calibration component and a calibration and calibration method, and the component is used for cooperating with an eye parameter evaluation device so as to calibrate and calibrate the precision of the to-be-measured eyeball motion range before the eye parameter evaluation device measures the eyeball motion range. The component comprises a push rod, a reflecting mirror, a canthus clamping point, a clamping point fixing seat and an eyeball motion range calibration object, the canthus clamping point and the eyeball motion range calibration object are connected through the clamping point fixing seat, the reflecting mirror is fixed to the front end of the canthus clamping point, the push rod is arranged on one side of the eyeball motion range calibration object, and the eyeball motion range calibration object is provided with eight connecting rods which are evenly distributed. The calibration and calibration component for the eyeball motion range is matched with the eye parameter evaluation device, the calibration and calibration component is measured, and the eye parameter evaluation device can be calibrated and calibrated according to a measurement result.

Description

Technical Field

[0001] The invention relates to the technical field of eye measurement, and in particular to a calibration component and a calibration method for eyeball mobility. 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 is common in the critical period of life between 30 and 50 years old, leading to obvious disfiguring changes in appearance and visual dysfunction (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. The existing examination of eye movement disorders mainly relies on doctors to make a qualitative judgment on the patient's eye movement. The main methods for examining eye movement are:

[0003] 1. Direct observation method: the doctor holds a spotlight about half a meter in front of the patient and guides the patient's eyeballs to move with the target to judge the patient's eye movement. This method is too subjective, has no quantitative indicators, and cannot record the patient's activity data and pictures during the examination.

[0004] 2. Infrared eye movement method. This method uses an infrared light source to emit infrared light and uses the reflection difference at the edge of the cornea to detect eye movement. This method actively illuminates the human eye through an infrared transmitter. The equipment structure and system are complex, and the required environment is special. It will cause discomfort to the patient and is expensive.

[0005] 3. Corneal reflection method: this method requires the patient to look at the light 33cm in front of them and determine whether the corneal reflection point is located in the center of the pupils of both eyes to determine whether the eyes are in the correct position. This method is mainly used to determine strabismus and is not suitable for the judgment and examination of ocular movement disorders.

[0006] The above method cannot quantitatively calculate the eyeball activity. For this reason, the applicant proposed an eye parameter evaluation device (application number ZL202210989498.3) and an eyeball activity evaluation method, system and storage medium (application number ZL202210989508.3). The device involved in the above patent can measure the eyeball activity. However, whether the eyeball activity measured by the above device is consistent with the true value of the eyeball activity still needs further verification. Summary of the invention

[0007] In order to overcome the deficiency of the prior art that the accuracy of eyeball activity measurement is not taken into account, the present invention proposes a calibration and calibration component for eyeball activity and a calibration and calibration method. A calibration object and a fixed installation method for measuring the eyeball activity of the human body are designed. The calibration object simulates the pupil and iris 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 for eyeball activity 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.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] The invention discloses a calibration and calibration component for eyeball activity, which is used to cooperate with an eye parameter evaluation device so as to calibrate and calibrate the accuracy of the eyeball activity to be measured before the eye parameter evaluation device measures the eyeball activity. The calibration and calibration component for eyeball activity comprises: a push rod, a reflector, an eye corner card point, a card point fixing seat, and an eyeball activity calibration object, wherein the eyeball activity calibration object comprises a protruding hemisphere, on which a simulated human pupil and iris are arranged, the eye corner card point and the eyeball activity calibration object are connected via 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 eyeball activity calibration object, and the reflector is Fixed at the front end of the eye corner card point, the push rod is set on one side of the eye mobility calibration object, and the side of the eye mobility calibration object with simulated human pupil and iris is pushed toward the eye corner card point by the push rod. The eye mobility calibration object includes a replaceable calibration object with an eye mobility of 0 degrees and a calibration object with an eye mobility of a preset angle. By installing the calibration object with an eye mobility of 0 degrees as a reference for calibration and calibration, the outside of the calibration object with a mobility of a preset angle has eight evenly distributed connecting rods, and by rotating the calibration object, the eight connecting rods are matched with the card point fixing seat in turn to realize the movable connection between the card point fixing seat and the eye mobility calibration object.

[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 side of the eyeball mobility calibration object with simulated human pupil and iris 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 eyeball mobility calibration and calibration component also includes a pin, 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 connecting rod is movably connected to the waist of the U-shaped seat body by a pin.

[0012] Furthermore, the preset angle is 30 degrees.

[0013] Furthermore, the calibration object with a movable range of a certain preset angle is provided with a reference rod located in the center and an angle positioning rod which forms a certain preset angle with the reference rod on the opposite side of the protruding hemisphere.

[0014] The present application also provides a method for calibrating and calibrating eyeball activity, which uses the above-mentioned eyeball activity calibration and calibration component to cooperate with an eye parameter evaluation device, and installs the eyeball activity calibration and calibration component on the eye parameter evaluation device, characterized in that the method comprises the following steps:

[0015] S1: Install a calibration object with an eyeball activity of 0 degrees, and push the side of the calibration object with simulated human pupil and iris toward the eye corner card point through a push rod;

[0016] S2: When the calibration object is in contact with the reflector, the image of the calibration object is collected by the eye parameter evaluation device as a reference for calibration and correction;

[0017] S3: remove the calibration object with an eyeball mobility of 0 degrees, and replace it with a calibration object with an eyeball mobility of a preset angle, and rotate the calibration object so that the eight connecting rods are matched with the card point fixing seat in turn to realize the movable connection between the card point fixing seat and the eyeball mobility calibration object. After each connection, the side of the calibration object with the simulated human eye pupil and iris is pushed toward the eye corner card point by the push rod. When the calibration object contacts the reflector, the eye parameter evaluation device collects the image of the calibration object, and based on the collected eight images of the calibration object and the image of the calibration object used as the reference, the values ​​of the eyeball mobility in various directions of the second eye position and the third eye position are calculated;

[0018] S4: comparing the calculated values ​​of the eyeball activity with the calibration values ​​of the eyeball activity calibration objects;

[0019] S5: Determine whether the difference between the two is less than or equal to the set value;

[0020] S51: When the difference between the two is less than or equal to the set value, it is determined that the measurement accuracy of the eye parameter evaluation device meets the requirement, and the calibration and calibration are terminated;

[0021] S52: When one of the differences between the two is greater than the set value, it is determined that there is a deviation in the structural assembly or parameter setting of the eye parameter evaluation device. When a deviation occurs, further adjust the structural assembly or parameter setting in the eye parameter evaluation device and return to step S1.

[0022] Furthermore, a pressure sensor is disposed in the hollow cavity of the eye corner card point and electrically connected to the eye parameter evaluation device. When the side of the calibration object having the simulated human pupil and iris is pushed toward the eye corner card point by a push rod, the pressure value of the pressure sensor is monitored by the eye parameter evaluation device. When the calibration object contacts the reflector and the pressure value is constant, it is determined that the object is pushed into place.

[0023] Furthermore, when the eye parameter evaluation device collects images of the eyeball activity calibration object and calculates the value of the eyeball activity, the value of the eyeball activity is obtained by averaging multiple measurements.

[0024] Furthermore, the calibration value of the eyeball movement is the angle between the axis of the hemisphere and the line passing through the center of the simulated human eye pupil and the center of the sphere in a calibration object with a preset angle, which is obtained through a third-party metrology institute.

[0025] Furthermore, the set value is 5 degrees.

[0026] The technical solution of the present invention has the following beneficial effects:

[0027] 1. By coordinating the eye movement calibration and calibration components with the eye parameter evaluation device or eye movement evaluation system in the prior art, the actual human eye in the eye parameter evaluation device is replaced by the eye movement calibration object, and the eye parameter evaluation device is used to capture images of the 0 degree calibration object and a preset angle calibration object and perform calculations to obtain multiple activity values ​​of the second eye position and the third eye position, and the calibration values ​​of the eye movement of the calibration object are compared with those of a third-party metrology institute in advance to determine whether the measurement accuracy of the eye parameter evaluation device meets the requirements. If it does not meet the requirements, the structural assembly or parameters of the eye parameter evaluation device can be further recalculated and determined, thereby improving the measurement accuracy of the eye parameter evaluation device to ensure accuracy in subsequent actual measurements.

[0028] 2. The eye movement calibration object is pushed by the push rod to make the eye movement calibration object contact with the reflector, thereby simulating the contact measurement during the eye movement 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 a tight installation and protect the equipment from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 An exploded view of the calibration and calibration components for eyeball mobility in the present invention;

[0030] Figure 2 It is a schematic diagram of a calibration object with a range of motion of 0 degrees and a calibration object with a range of motion of 30 degrees in the present invention;

[0031] Figure 3It is an assembly diagram of the calibration and calibration components of the eyeball activity in the present invention;

[0032] Figure 4 Another view of the assembly diagram of the calibration and calibration components of the eyeball movement in the present invention;

[0033] Figure 5 A schematic diagram of the definition of the calibration value of the eyeball activity in the present invention;

[0034] Figure 6 A flow chart of the calibration and calibration of eyeball activity in the present invention; DETAILED DESCRIPTION

[0035] The specific implementation of the present invention is further described in detail below 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.

[0036] Embodiment 1:

[0037] like Figure 1-5 As shown, this embodiment provides a calibration and calibration component for eyeball mobility, including: a push rod 10, a pin 11, a reflector 12, an eye corner clamping point 13, a clamping point fixing seat 14, and an eyeball mobility calibration object 15. The eyeball mobility calibration object 15 includes a calibration object with a mobility of 0 degrees and a calibration object with a mobility of 30 degrees. Figure 2The eyeball mobility calibration object 15 includes a protruding hemisphere, on which a simulated human eye pupil and iris are arranged, wherein a calibration object with a mobility of 0 degrees means that the simulated human eye pupil and iris are located at the center of the hemisphere, and a calibration object with a mobility of 30 degrees means that the simulated human eye pupil and iris are located at an eccentric position of the hemisphere and the eccentricity is 30 degrees, and the eccentricity refers to the angle between the axis of the hemisphere and the line passing through the center of the simulated human eye pupil and the center of the sphere. Of course, the eyeball mobility can also be selected to be other degrees, for example, 15 degrees, 45 degrees, etc. The outside of the calibration object has connecting rods, wherein the calibration object with a mobility of 0 degrees has two connecting rods, and the calibration object with a mobility of 30 degrees has eight evenly distributed connecting rods, and 360 degrees are equally divided by the eight evenly distributed connecting rods to serve as the simulation basis for the second eye position and the third eye position. The eye corner clamping point 13 and the eyeball mobility calibration object 15 are connected by the clamping point fixing seat 14. The eye corner clamping point 13 is a long arm-shaped component 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 16. The long screw 17 is used to tighten the open end of the U-shaped seat body. The clamping point fixing seat 14 and the eyeball mobility calibration object 15 are connected by a pin 11. A through hole is provided on the connecting rod of the calibration object. The through hole 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 or rotated, 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 clamping point 13. The fixing method can be selected from bonding, clamping, screw connection, etc. The push rod 10 is arranged on the side of the eyeball movement calibration object 15 opposite to the simulated human eye pupil and iris, and the side of the eyeball movement calibration object 15 with the simulated human eye pupil and iris is pushed toward the eye corner clamping point 13 by the push rod 10. 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, hydraulic, etc., as long as the assembly can be achieved and the position relationship can be maintained. Figure 4-5 It can be seen that the back of the calibration object with a range of motion of 30 degrees has two rods, namely the angle positioning rod and the reference rod. The calibration value of the eyeball mobility is the spatial angle between the above two rods, which is measured by a third-party metrology institute and a measurement report is issued.

[0038] 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 arranged 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 have an interface for electrical connection with the eye parameter evaluation device or the eye movement evaluation system. When the side of the eye movement calibration object 15 with the simulated human pupil and iris is pushed toward the eye corner clamping point 13 by the push rod 10, the pressure value is monitored by the pressure sensor. 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 may easily damage the device. Therefore, the push of the push rod 10 is stopped when the pressure value is constant.

[0039] The above-mentioned eyeball activity calibration and calibration component cooperates with the eye parameter evaluation device to calibrate and calibrate the eyeball activity, which can completely simulate the measurement process of real people. 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 with the eyeball activity calibration and calibration component in this embodiment, the eye corner card point 13 in the eyeball activity 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 eyeball activity calibration and calibration component is used to replace the reflector in the eye parameter evaluation device, and the eyeball activity 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 eyeball activity measured by the eye parameter evaluation device using the above-mentioned eyeball activity 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 eyeball activity calibration object 15 should be parallel to the eye parameter evaluation device when the push rod 10 pushes the eyeball activity calibration object 15 into place. After the eyeball activity calibration and calibration components have replaced the relevant components in the eye parameter evaluation device, the measurement principle of the eyeball activity is exactly the same as the measurement principle described in the eye parameter evaluation device in the aforementioned application.

[0040] Embodiment 2:

[0041] like Figure 6 As shown, this embodiment provides a method for calibrating and calibrating eyeball activity, using the eyeball activity calibration and calibration component in Example 1 in conjunction with an eye parameter evaluation device or an eyeball activity evaluation system to calibrate and calibrate the eyeball activity measured by the eye parameter evaluation device or the eyeball activity evaluation system before actual measurement, and the operation of the calibration and calibration method is as follows:

[0042] Step S1: Install a calibration object with an eyeball activity of 0 degrees, and push the side of the calibration object with simulated human pupil and iris toward the eye corner card point 13 through the push rod 10;

[0043] In the above step S1, the pressure sensor is set in the hollow cavity of the corner of the eye card point 13. The position of the pressure sensor should be set close to the contact position between the connecting rod and the corner of the eye card point 13 and have an interface for electrical connection with the eye parameter evaluation device or the eyeball activity evaluation system. When the side of the calibration object with the simulated human pupil and iris is pushed toward the corner of the eye card point 13 by the push rod 10, the pressure value of the pressure sensor is monitored by the eye parameter evaluation device. When the calibration object is in contact with the reflector 12 and the pressure value is constant, it is determined that the push is in place. 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.

[0044] Step S2: when the calibration object is in contact with the reflector 12, the eye parameter evaluation device collects a picture of the calibration object as a reference for calibration and correction;

[0045] In step S2, the eye parameter evaluation device collects pictures of the calibration object by photographing. Since the calibration object at this time is a calibration object with an eyeball mobility of 0 degrees, the pupil and iris of the simulated human eye are located at the center of the hemisphere. The collected picture is an eye image of the first eye position, that is, the eye position of the eye looking straight ahead at infinity on the horizontal plane, which can be compared with the subsequent pictures of the second eye position and the third eye position for analysis and calculation.

[0046] Step S3: remove the calibration object with an eye mobility of 0 degrees, and replace it with a calibration object with an eye mobility of 30 degrees. By rotating the calibration object, the eight connecting rods are matched with the card point fixing seat 14 in turn to realize the active connection between the card point fixing seat 14 and the eye mobility calibration object 15. After each connection, the side of the calibration object with simulated human pupil and iris is pushed toward the eye corner card point 13 by the push rod 10. When the calibration object contacts the reflector 12, the pressure can still be monitored by the pressure sensor in the same way as in step S1 to ensure that it is assembled in place. After assembly, the image of the calibration object is collected by the eye parameter evaluation device. Based on the collected eight images of the calibration object and the image of the calibration object used as the reference, the values ​​of the eye mobility in various directions of the second eye position and the third eye position are calculated, and the values ​​are obtained by Figure 4 It can be seen that the second eye position refers to the eye position when the eyeball moves up, down, inward, and outward, corresponding to Figure 4The eye positions when the four connecting rods 14 are matched with the card point fixing seat 14 are engraved with 30 degrees above, 30 degrees below, 30 degrees on the left and 30 degrees on the right. The third eye position refers to the eye position when the eyeball is rotated obliquely inward, inward, outward and outward, corresponding to Figure 4 When the four connecting rods with upper left 30 degrees, lower left 30 degrees, upper right 30 degrees, and lower right 30 degrees are matched with the card point fixing seat 14, there are eight calculated values ​​of mobility, and the calculation method is exactly the same as the calculation method in the aforementioned eye parameter evaluation device and eyeball mobility evaluation system. When calculating the eyeball mobility value, the method of multiple measurements and averaging can be used to reduce the measurement and calculation errors, and the number of multiple measurements can be, for example, three times.

[0047] Step S4: Compare the eight calculated values ​​of eye mobility with the calibration values ​​of the eye mobility calibration object respectively. The calibration value is 30 degrees, which is the angle between the axis of the hemisphere of the calibration object and the line passing through the center of the simulated human eye pupil and the center of the sphere. It is obtained through a third-party metrology institute, and a measurement report is issued by the third-party metrology institute.

[0048] Step S5: Determine whether the difference between the two is less than or equal to a set value. Preferably, the set value may be 5 degrees.

[0049] Step S51: when the difference between the two is less than or equal to the set value, it is determined that the measurement accuracy of the eye parameter evaluation device meets the requirements, and the calibration is terminated;

[0050] Step S52: When one of the differences between the two is greater than the set value, it is determined that there is a deviation in the structural assembly or parameter setting of the eye parameter evaluation device. When there is a deviation, the structural assembly or parameter setting in the eye parameter evaluation device is further adjusted. For example, the distance from the camera to the eye corner card point in the eye parameter evaluation device, the angle between the reflector and the measurement reference surface in the eye corner card point, the motor position of the eye corner card point, etc. are adjusted. After adjustment, return to step S1 to re-calibrate and calibrate until the accuracy requirement is met.

[0051] By using the above-mentioned method for calibrating and calibrating the eyeball movement, each eye parameter evaluation device can be calibrated and calibrated after it is installed in place, so as to ensure the measurement accuracy of the subsequent eye parameter evaluation devices.

[0052] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A calibration component for eyeball activity, used for cooperating with an eye parameter evaluation device to calibrate and calibrate the accuracy of the eyeball activity to be measured before the eye parameter evaluation device measures the eyeball activity, characterized in that: The eyeball mobility calibration and calibration components include: a push rod (10), a reflector (12), an eye corner card point (13), a card point fixing seat (14), and an eyeball mobility calibration object (15), wherein the eyeball mobility calibration object (15) includes a protruding hemisphere, on which a simulated human eye pupil and iris are arranged, the eye corner card point (13) and the eyeball mobility 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 eyeball mobility calibration object (15), the reflector (12) is fixed at the front end of the eye corner card point (13), and the push rod (10) is arranged at the eye corner card point (13). One side of the eyeball mobility calibration object (15) is pushed toward the eye corner clamping point (13) by a push rod (10). The eyeball mobility calibration object (15) further comprises a replaceable calibration object with an eyeball mobility of 0 degrees and a calibration object with an eyeball mobility of a certain preset angle. The calibration object with an eyeball mobility of 0 degrees is installed as a reference for calibration and correction. The calibration object with an eyeball mobility of a certain preset angle has eight evenly distributed connecting rods on the outside. The calibration object is rotated so that the eight connecting rods are matched with the clamping point fixing seat (14) in turn, thereby realizing the movable connection between the clamping point fixing seat (14) and the eyeball mobility calibration object (15).

2. The eyeball activity calibration component 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 side of the eyeball activity calibration object (15) having the simulated human pupil and iris 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 eyeball activity calibration component according to claim 2, characterized in that: The eyeball mobility calibration and calibration component also includes a pin (11), and the card point fixing seat (14) has a U-shaped seat body, the U-shaped seat body is fixed to the eye corner card point (13) by screws (17, 18), and the connecting rod is movably connected to the waist of the U-shaped seat body by the pin (11).

4. The eyeball activity calibration component according to claim 1, characterized in that: The preset angle is 30 degrees.

5. The eyeball activity calibration component according to any one of claims 1 to 4, characterized in that: The calibration object with a movable degree of a certain preset angle is provided with a reference rod located in the center and an angle positioning rod which forms a certain preset angle with the reference rod on the opposite side of the protruding hemisphere.

6. A method for calibrating and correcting eyeball activity, comprising: using the eyeball activity calibration and correction component as claimed in any one of claims 1 to 5 in combination with an eye parameter evaluation device, and installing the eyeball activity calibration and correction component on the eye parameter evaluation device, characterized in that: The method comprises the following steps: S1: installing a calibration object with an eyeball activity of 0 degrees, and pushing the side of the calibration object with simulated human pupil and iris toward the eye corner clamping point (13) by means of a push rod (10); S2: when the calibration object is in contact with the reflector (12), an image of the calibration object is collected by the eye parameter evaluation device to serve as a reference for calibration and correction; S3: removing the calibration object with an eyeball mobility of 0 degrees and replacing it with a calibration object with an eyeball mobility of a preset angle, rotating the calibration object so that eight connecting rods are sequentially matched with the card point fixing seat (14) to realize the movable connection between the card point fixing seat (14) and the eyeball mobility calibration object (15), and after each connection, pushing the side of the calibration object with simulated human pupil and iris toward the eye corner card point (13) by the push rod (10), when the calibration object contacts the reflector (12), collecting images of the calibration object by the eye parameter evaluation device, and calculating the values ​​of the eyeball mobility in various directions of the second eye position and the third eye position based on the collected eight images of the calibration object and the image of the calibration object used as the reference; S4: comparing the calculated values ​​of the eyeball activity with the calibration values ​​of the eyeball activity calibration object (15); S5: Determine whether the difference between the two is less than or equal to the set value; S51: When the difference between the two is less than or equal to the set value, it is determined that the measurement accuracy of the eye parameter evaluation device meets the requirement, and the calibration and calibration are terminated; S52: When one of the differences between the two is greater than the set value, it is determined that there is a deviation in the structural assembly or parameter setting of the eye parameter evaluation device. When a deviation occurs, further adjust the structural assembly or parameter setting in the eye parameter evaluation device and return to step S1.

7. The method for calibrating eyeball activity as claimed in claim 6, characterized in that: The pressure sensor is arranged in the hollow cavity of the eye corner clamping point (13) and is electrically connected to the eye parameter evaluation device. When the side of the calibration object having the simulated human pupil and iris is pushed toward the eye corner clamping point (13) by the push rod (10), the pressure value of the pressure sensor is monitored by the eye parameter evaluation device. When the calibration object contacts the reflector (12) and the pressure value is constant, it is determined that the calibration object has been pushed into place.

8. The method for calibrating and calibrating eyeball activity as claimed in claim 6 or 7, characterized in that: When the eye parameter evaluation device collects a picture of the eyeball activity calibration object (15) and calculates the value of the eyeball activity, the value of the eyeball activity is obtained by using a method of averaging multiple measurements.

9. The method for calibrating and calibrating eyeball activity as claimed in claim 6 or 7, characterized in that: The calibration value of eyeball mobility is the angle between the axis of the hemisphere and the line passing through the center of the simulated human eye pupil and the center of the sphere in a calibration object with a preset angle, which is obtained through a third-party metrology institute.

10. The method for calibrating and calibrating eyeball activity according to claim 6 or 7, characterized in that: The set value is 5 degrees.

Images