A calibration and alignment component and method for eye movement

Abstract

The present application protects a kind of calibration and calibration components and calibration and calibration methods of eye movement, the component is used and eye parameter evaluation device cooperation to calibrate and calibrate the precision of the eye movement to be measured before eye parameter evaluation device measures eye movement, the component includes push rod, mirror, eye corner card point, card point fixing seat, eye movement calibration object, eye corner card point and eye movement calibration object are connected by card point fixing seat, mirror is fixed to the front end of eye corner card point, push rod is arranged in one side of eye movement calibration object, eye movement calibration object has eight connecting rods. By the calibration and calibration components of eye movement and the cooperation of the above-mentioned eye parameter evaluation device, the calibration and calibration components are measured, and the measurement results can be used to calibrate and calibrate the above-mentioned eye parameter evaluation device.

Description

Technical Field

[0001] This invention relates to the field of ocular measurement technology, specifically to a calibration and scaling component and method for ocular movement. Background Technology

[0002] Thyroid-associated ophthalmopathy (TAO) is an inflammatory eye condition caused by autoimmune thyroid diseases, particularly Graves' disease. It affects 20%-50% of patients with abnormal thyroid function, and is most common between the ages of 30 and 50, leading to significant disfiguring changes and visual impairment (diplopia and vision loss), prompting patients to seek medical attention. The diagnosis of TAO currently follows the Barteley criteria established by George B. Barteley and Colum A. Gorman in 1995, as well as the latest diagnostic and treatment guidelines for TAO from 2022. Thyroid-associated ophthalmopathy causes several clinical signs, including eyelid retraction, proptosis, oculomotor dysfunction, and strabismus. Oculomotor dysfunction restricts the free movement of the eyes. Current methods for assessing oculomotor dysfunction primarily involve a qualitative assessment of the patient's eye movements by a physician. The main methods for examining oculomotor function include:

[0003] 1. Direct observation method: The doctor holds a spotlight about half a meter in front of the patient and guides the patient's eyes to follow the target to judge the patient's eye movement. This method is too subjective, lacks quantitative indicators, and cannot record the patient's activity data or images for that examination.

[0004] 2. Infrared eye-tracking: This method uses an infrared light source to emit infrared light and detects eye movements by utilizing the difference in reflection at the edge of the cornea. This method actively illuminates the human eye with an infrared emitter. The equipment structure and system are complex, require a special environment, can cause discomfort to the patient, and are expensive.

[0005] 3. Corneal light reflex test: This method involves having the patient look at a light source 33cm directly in front of them and determining whether the corneal reflective point is located in the center of both pupils to determine if the eyes are in a normal eye position. This method is mainly used to determine strabismus and is not suitable for the diagnosis and examination of eye movement disorders.

[0006] The aforementioned methods cannot quantitatively calculate eye movement. Therefore, the applicant has proposed an eye parameter assessment device (application number ZL202210989498.3) and an eye movement assessment method, system, and storage medium (application number ZL202210989508.3). The devices involved in the aforementioned patents can measure eye movement. However, whether the eye movement measured by the aforementioned devices is consistent with the true value of eye movement still needs further verification. Summary of the Invention

[0007] To overcome the shortcomings of existing technologies that do not consider the accuracy of eye movement measurement, this invention proposes an eye movement calibration and standardization component and method. A calibration object and its fixed installation method for measuring human eye movement are designed. This calibration object simulates the pupil and iris of the human eye, enabling automatic identification and calculation. The fixed installation method ensures stability during the measurement process. By cooperating with the aforementioned eye movement calibration and standardization component and an eye parameter evaluation device, measurements are taken using the calibration and standardization component, and the measurement results are used to calibrate and standardize the eye parameter evaluation device.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] An eye movement calibration and standardization component is provided for use with an ocular parameter assessment device to calibrate and standardize the accuracy of the eye movement to be measured before the ocular parameter assessment device measures the eye movement. The component includes: a push rod, a reflector, an eye corner locking point, a locking point fixing seat, and an eye movement calibration object. The eye movement calibration object includes a protruding hemisphere with a simulated human pupil and iris on it. The eye corner locking point and the calibration object are connected via the locking point fixing seat, which is fixedly connected to the eye corner locking point and movably connected to the eye movement calibration object. The reflector... The front end of the device is fixed at the corner of the eye. A push rod is set on one side of the eye movement calibration object. The push rod pushes the side of the eye movement calibration object with the simulated human pupil and iris toward the corner of the eye. The eye movement calibration object includes a replaceable calibration object with an eye movement of 0 degrees and a calibration object with an eye movement of a preset angle. The calibration object with an eye movement of 0 degrees is used as the reference for calibration and adjustment. The calibration object with an eye movement of a preset angle has eight evenly distributed connecting rods on its outside. By rotating the calibration object, the eight connecting rods are sequentially engaged with the fixing seat of the eye movement calibration object to realize the movable connection between the fixing seat of the eye movement calibration object and the eye movement calibration object.

[0010] Furthermore, the corner of the eye has a hollow cavity, and a pressure sensor is installed in the hollow cavity of the corner of the eye. When the side of the eye movement calibrator that simulates the pupil and iris of a human eye is pushed toward the corner of the eye by the push rod, the pressure sensor monitors the pressure value.

[0011] Furthermore, the eye movement calibration and adjustment component also includes a pin, and the locking point fixing seat has a U-shaped body. The U-shaped body is fixed to the corner locking point by screws, and the connecting rod is movably connected to the waist of the U-shaped body by a pin.

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

[0013] Furthermore, a reference rod located at the center and an angle positioning rod at a certain preset angle are provided on the opposite side of the protruding hemisphere, with a range of motion of a certain preset angle.

[0014] This application also provides a method for calibrating and standardizing eye movement, which uses the aforementioned eye movement calibration and standardization component in conjunction with an eye parameter evaluation device, wherein the eye movement calibration and standardization component is mounted on the eye parameter evaluation device, characterized in that the method includes the following steps:

[0015] S1: Install a calibration object with an eye movement of 0 degrees, and push the side of the calibration object that simulates the pupil and iris of a human eye toward the corner of the eye using a push rod;

[0016] S2: When the calibration object comes into contact with the reflector, an image of the calibration object is acquired by the eye parameter evaluation device as a reference for calibration and standardization.

[0017] S3: Remove the calibration object with an eye movement of 0 degrees and replace it with a calibration object with an eye movement of a preset angle. By rotating the calibration object, the eight connecting rods are sequentially engaged with the locking point fixing seat to achieve a movable connection between the locking point fixing seat and the eye movement calibration object. After each connection, the side of the calibration object with the simulated human pupil and iris is pushed towards the corner of the eye locking point by the push rod. When the calibration object contacts the reflector, the eye parameter evaluation device collects an image of the calibration object. Based on the eight collected images of the calibration object and the image of the calibration object used as a reference, the values ​​of eye movement in each direction in the second and third eye positions are calculated.

[0018] S4: Compare the calculated eye movement values ​​with the calibrated eye movement values ​​of the eye movement calibrator.

[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 values ​​is less than or equal to the set value, the measurement accuracy of the eye parameter assessment device is determined to meet the requirements, and the calibration and adjustment are completed.

[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, the structural assembly or parameter setting in the eye parameter evaluation device is further adjusted, and the process returns to step S1.

[0022] Furthermore, a pressure sensor is placed inside the hollow cavity at the corner of the eye and electrically connected to the eye parameter evaluation device. When the side of the calibrator with the simulated human pupil and iris is pushed towards the corner of the eye by the push rod, the pressure value of the pressure sensor is monitored by the eye parameter evaluation device. When the calibrator contacts the reflector and the pressure value is constant, it is determined that the calibrator has been pushed into place.

[0023] Furthermore, when the eye parameter assessment device acquires images of the eye movement calibration object and calculates the value of eye movement, it uses a method of averaging multiple measurements to obtain the value of eye movement.

[0024] Furthermore, the calibration value of eye movement is obtained by a third-party metrology institute from the angle between the axis of the hemisphere and the line connecting the center of the simulated human pupil and the center of the hemisphere in a calibration object at a certain preset angle.

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

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

[0027] 1. By integrating the eye movement calibration and measurement components with existing eye parameter assessment devices or eye movement assessment systems, and replacing the actual human eye in the eye parameter assessment device with an eye movement calibration object, the eye parameter assessment device captures images of the 0-degree calibration object and a calibration object at a preset angle, and performs calculations to obtain multiple movement values ​​for the second and third eye positions. These values ​​are then compared with the pre-calibrated eye movement values ​​of the calibration object by a third-party metrology institute to determine whether the measurement accuracy of the eye parameter assessment device meets the requirements. If it does not meet the requirements, the structure, assembly, or parameters of the eye parameter assessment device can be further recalculated and determined, thereby improving the measurement accuracy of the eye parameter assessment device and ensuring the 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 the reflector. This can simulate the contact measurement process in the eye movement measurement process. Since a pressure sensor is set in the hollow cavity of the corner of the eye, the pressure sensor is used to monitor the fitting gap of the equipment, which can ensure tight installation and protect the equipment from damage. Attached Figure Description

[0029] Figure 1 This is an exploded view of the eye movement calibration and scaling component in this invention;

[0030] Figure 2 This is a schematic diagram of a calibration object with a degree of activity of 0 degrees and a calibration object with a degree of activity of 30 degrees in this invention;

[0031] Figure 3This is an assembly diagram of the eye movement calibration and calibration components in this invention;

[0032] Figure 4 Another view showing the assembly diagram of the eye movement calibration and calibration components in this invention;

[0033] Figure 5 This is a schematic diagram illustrating the definition of the calibration value for eye movement in this invention;

[0034] Figure 6 This is a flowchart illustrating the calibration and scaling of eye movement in this invention. Detailed Implementation

[0035] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0036] Example 1:

[0037] like Figure 1-5 As shown, this embodiment provides a calibration and scaling component for eye movement, including: a push rod 10, a pin 11, a reflector 12, an eye corner locking point 13, a locking point fixing seat 14, and an eye movement calibration object 15. The eye movement calibration object 15 includes a calibration object with a movement of 0 degrees and a calibration object with a movement of 30 degrees. See also... Figure 2The eye movement calibration object 15 includes a protruding hemisphere, on which a simulated human pupil and iris are mounted. A calibration object with 0 degrees of movement means the simulated human pupil and iris are located at the center of the hemisphere. A calibration object with 30 degrees of movement means the simulated human pupil and iris are located off-center from the hemisphere with an eccentricity of 30 degrees. Eccentricity refers to the angle between the axis of the hemisphere and the line connecting the center of the simulated human pupil to the center of the hemisphere. Of course, other degrees of eye movement can also be selected, such as 15 degrees, 45 degrees, etc. The calibration object has connecting rods on its exterior. A calibration object with 0 degrees of movement has two connecting rods, and a calibration object with 30 degrees of movement has eight evenly distributed connecting rods. These eight evenly distributed connecting rods divide the 360 ​​degrees equally to serve as the basis for simulating the second and third eye positions. The corner eye anchor 13 and the eye movement calibration object 15 are connected by an anchor 14. The corner eye anchor 13 is a long, arm-shaped component with a hollow cavity. The anchor 14 contains a U-shaped base. The two arms of the U-shaped base are connected to the cavity of the corner eye anchor 13 by screws 16. A long screw 17 is used to tighten the open end of the U-shaped base. The anchor 14 and the eye movement calibration object 15 are connected by a pin 11. The connecting rod of the calibration object has a through hole that is inserted into a slot in the waist of the U-shaped base. The pin 11 passes through the through hole on the U-shaped base and the connecting rod to connect the two. When it is necessary to replace or rotate the calibration object, 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 corner eye anchor 13. The fixing method can be adhesive, snap-fit, screw connection, etc. The push rod 10 is positioned on the side of the eye movement calibration object 15 opposite to the simulated human pupil and iris. The push rod 10 pushes the side of the eye movement calibration object 15 with the simulated human pupil and iris towards the corner of the eye locking point 13. This embodiment does not limit the power source of the push rod 10; in practice, various methods such as electric, pneumatic, and hydraulic can be used to push the push rod 10, as long as proper assembly and positional maintenance are achieved. Figure 4-5 As can be seen, the back of the calibration object with a range of motion of 30 degrees has two rods, namely an angle positioning rod and a reference rod. The calibration value of the eye movement is the spatial angle between the two rods, which is measured by a third-party metrology institute and a metrology report is issued.

[0038] To ensure a tight fit between the calibrator and the corner eye point 13, and to protect the device from excessive pressure, a pressure sensor is installed inside the hollow cavity of the corner eye point 13. The pressure sensor should be positioned close to the contact point between the connecting rod and the corner eye point 13, and should have an interface for electrical connection to an eye parameter assessment device or an eye movement assessment system. When the side of the eye movement calibrator 15 with the simulated human pupil and iris is pushed towards the corner eye point 13 by the push rod 10, the pressure sensor monitors the pressure value. When there is no contact, the pressure value is zero. When the pressure value tends to be constant, it indicates that the assembly is in place. If the pressure value continues to increase, it indicates that the pressure is too tight, which may easily damage the device. Therefore, the push rod 10 is stopped from being pushed further when the pressure value is constant.

[0039] The aforementioned eye movement calibration and standardization component works in conjunction with the eye parameter assessment device to calibrate and standardize eye movement, completely simulating the measurement process during real-person measurement. Specifically, the canthus point used to fix the outer canthus of the eye and the corresponding reflector in the eye parameter assessment device are first removed and replaced with the eye movement calibration and standardization component of this embodiment. The canthus point 13 in the eye movement calibration and standardization component replaces the canthus point in the eye parameter assessment device, and the reflector 12 in the eye movement calibration and standardization component replaces the reflector in the eye parameter assessment device. The eye movement calibration object 15 is used to simulate the real human eye in the eye parameter assessment device. To ensure the accuracy of the calibration and calibration of eye movement measured by the ocular parameter assessment device using the aforementioned ocular movement calibration and calibration components, the dimensions and angles of the corner locator 13 and reflector 12 should be consistent with those of the corner locator and reflector in the ocular parameter assessment device. Furthermore, when the push rod 10 pushes the ocular movement calibration object 15 into place, the reference plane of the ocular movement calibration object 15 should be parallel to the ocular parameter assessment device. After the ocular movement calibration and calibration components replace the relevant components in the ocular parameter assessment device, the measurement principle of ocular movement is completely identical to the measurement principle described in the aforementioned application for the ocular parameter assessment device.

[0040] Example 2:

[0041] like Figure 6 As shown, this embodiment provides a method for calibrating and standardizing eye movement. The eye movement calibration and standardization component from Embodiment 1 is used in conjunction with an eye parameter assessment device or an eye movement assessment system to calibrate and standardize the eye movement measured by the eye parameter assessment device or the eye movement assessment system before actual measurement. The calibration and standardization method is as follows:

[0042] Step S1: Install the calibration object with an eye movement of 0 degrees, and push the side of the calibration object with the simulated human pupil and iris toward the corner of the eye 13 by using the push rod 10;

[0043] In step S1 above, the pressure sensor is placed inside the hollow cavity of the corner eye locking point 13. The pressure sensor should be positioned close to the contact point between the connecting rod and the corner eye locking point 13, and an interface should be provided for electrical connection with the eye parameter evaluation device or the eye movement assessment system. When the side of the calibrator with the simulated human pupil and iris is pushed towards the corner eye locking point 13 by the push rod 10, the pressure value of the pressure sensor is monitored by the eye parameter evaluation device. When the calibrator contacts the reflector 12 and the pressure value is constant, it is determined that the calibrator has been pushed into place. The pressure sensor monitors the pressure value. When there is no contact, the pressure value is zero. When the pressure value tends to be constant, it indicates that the assembly is in place. If the pressure value continues to increase, it indicates that the pressure is too tight, which may damage the device. Therefore, the push rod 10 is stopped when the pressure value is constant.

[0044] Step S2: When the calibration object comes into contact with the reflector 12, an image of the calibration object is acquired by the eye parameter evaluation device as a reference for calibration and standardization.

[0045] In step S2, the eye parameter evaluation device acquires images of the calibration object by taking pictures. Since the calibration object at this time is a calibration object with an eye movement of 0 degrees, simulating the human eye pupil and iris located at the center of the hemisphere, the acquired image is the eye image in the first eye position, that is, the eye position when looking straight ahead at infinity on the horizontal plane. It can be compared, analyzed and calculated with the subsequent second and third eye position images.

[0046] Step S3: Remove the calibration object with an eye movement range of 0 degrees and replace it with a calibration object with an eye movement range of 30 degrees. By rotating the calibration object, the eight connecting rods sequentially engage with the locking point fixing seat 14, thereby achieving a movable connection between the locking point fixing seat 14 and the eye movement calibration object 15. After each connection, the side of the calibration object with the simulated human pupil and iris is pushed towards the corner locking point 13 by the push rod 10. When the calibration object contacts the reflector 12, the pressure is monitored by the pressure sensor in the same way as in step S1 to ensure proper assembly. After proper assembly, images of the calibration object are acquired by the eye parameter evaluation device. Based on the acquired images of the eight calibration objects and the image of the reference calibration object, the values ​​of eye movement range in each direction at the second and third eye positions are calculated. Figure 4 As can be seen, the second eye position refers to the eye position when the eyeball moves upward, downward, inward, and outward, corresponding to... Figure 4The four connecting rods, marked with angles of 30 degrees upward, downward, left, and right, are positioned when engaged with the locking point 14. The third eye position refers to the eye position when the eyeball rotates obliquely inward, upward, downward, outward, and downward, corresponding to... Figure 4 The four connecting rods, marked with angles of 30 degrees to the upper left, lower left, upper right, and lower right, mate with the eye position when engaged with the locking point 14. A total of eight motion range values ​​are calculated, using the same method as those in the aforementioned eye parameter assessment device and eye movement assessment system. To reduce measurement and calculation errors, multiple measurements can be taken and averaged; for example, three measurements can be performed.

[0047] Step S4: Compare the calculated values ​​of the eight eye movements with the calibrated values ​​of the eye movements of the calibration object. The angle between the axis of the hemisphere and the line connecting the center of the simulated human pupil and the center of the hemisphere in the calibration object with a calibration value of 30 degrees is obtained by a third-party metrology institute, and a metrology 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 can be 5 degrees.

[0049] Step S51: When the difference between the two values ​​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 and adjustment are completed.

[0050] Step S52: If either of the differences is greater than the set value, it is determined that there is a deviation in the structural assembly or parameter settings of the eye parameter evaluation device. If a deviation occurs, further adjustments are made to the structural assembly or parameter settings of the eye parameter evaluation device. For example, adjusting the distance from the camera to the corner of the eye, the angle between the reflector at the corner of the eye and the measurement reference plane, and the position of the motor at the corner of the eye. After adjustment, return to step S1 for recalibration and re-calibration until the required accuracy is achieved.

[0051] By using the above-mentioned methods for calibrating and standardizing eye movement, each eye parameter assessment device can be calibrated and standardized after installation to ensure the measurement accuracy of subsequent eye parameter assessment 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 principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A calibration and standardization component for eye movement, used in conjunction with an ocular parameter assessment device to calibrate and standardize the accuracy of the eye movement to be measured before the ocular parameter assessment device measures the eye movement, characterized in that, The calibration and scaling components for eye movement include: a push rod (10), a reflector (12), an eye corner locking point (13), a locking point fixing seat (14), and an eye movement calibration object (15). The eye movement calibration object (15) includes a protruding hemisphere, on which a simulated human pupil and iris are provided. The eye corner locking point (13) and the eye movement calibration object (15) are connected by the locking point fixing seat (14). The locking point fixing seat (14) is fixedly connected to the eye corner locking point (13) and movably connected to the eye movement calibration object (15). The reflector (12) is fixed to the front end of the eye corner locking point (13), and the push rod (10) is set on the eye movement calibration object (15). On one side of the motion calibration object (15), the side of the eye movement calibration object (15) with the simulated human pupil and iris is pushed toward the corner of the eye (13) by the push rod (10). The eye movement calibration object (15) also includes a replaceable calibration object with an eye movement of 0 degrees and a calibration object with an eye movement of a certain preset angle. The calibration object with an eye movement of 0 degrees is installed as the reference for calibration and adjustment. The calibration object with an eye movement of a certain preset angle has eight evenly distributed connecting rods on its outside. By rotating the calibration object, the eight connecting rods are sequentially engaged with the locking point fixing seat (14) to realize the movable connection between the locking point fixing seat (14) and the eye movement calibration object (15).

2. The eye movement calibration and standardization component as described in claim 1, characterized in that, The corner of the eye (13) has a hollow cavity. A pressure sensor is installed in the hollow cavity of the corner of the eye (13). When the side of the eye movement calibrator (15) that simulates the pupil and iris of a human eye is pushed toward the corner of the eye (13) by the push rod (10), the pressure sensor monitors the pressure value.

3. The eye movement calibration and standardization component as described in claim 2, characterized in that, The eye movement calibration and calibration component also includes a pin (11), and the locking point fixing seat (14) has a U-shaped seat body. The U-shaped seat body is fixed to the corner locking point (13) by screws, and the connecting rod is movably connected to the waist of the U-shaped seat body by the pin (11).

4. The eye movement calibration and standardization component as described in claim 1, characterized in that, The preset angle is 30 degrees.

5. The eye movement calibration and standardization component as described in any one of claims 1-4, characterized in that, A calibration object with a certain preset angle of mobility is provided on the opposite side of the protruding hemisphere, with a reference rod located at the center and an angle positioning rod at a certain preset angle to the reference rod.

6. A method for calibrating and standardizing eye movement, comprising using an eye movement calibration and standardization component as described in any one of claims 1-5 in conjunction with an eye parameter evaluation device, wherein the eye movement calibration and standardization component is mounted on the eye parameter evaluation device, characterized in that, The method includes the following steps: S1: Install a calibrator with an eye movement of 0 degrees, and push the side of the calibrator with the simulated human pupil and iris toward the corner of the eye (13) by using the push rod (10); S2: When the calibration object comes into contact with the reflector (12), an image of the calibration object is acquired by the eye parameter evaluation device as a reference for calibration and standardization; S3: Remove the calibration object with an eye movement of 0 degrees and replace it with a calibration object with an eye movement of a certain preset angle. By rotating the calibration object, the eight connecting rods are sequentially engaged with the locking point fixing seat (14) to realize the movable connection between the locking point fixing seat (14) and the eye movement calibration object (15). After each connection, the side of the calibration object with the simulated human pupil and iris is pushed towards the corner locking point (13) by the push rod (10). When the calibration object contacts the reflector (12), the image of the calibration object is collected by the eye parameter evaluation device. Based on the collected images of the eight calibration objects and the image of the calibration object used as a reference, the values ​​of eye movement in each direction of the second eye position and the third eye position are calculated. S4: Compare the calculated values ​​of eye movement with the calibrated values ​​of eye movement of the eye movement calibrator (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 values ​​is less than or equal to the set value, the measurement accuracy of the eye parameter assessment device is determined to meet the requirements, and the calibration and adjustment are completed. 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, the structural assembly or parameter setting in the eye parameter evaluation device is further adjusted, and the process returns to step S1.

7. The method for calibrating and determining eye movement as described in claim 6, characterized in that, The pressure sensor is placed in the hollow cavity of the corner of the eye (13) and electrically connected to the eye parameter evaluation device. When the side of the calibrator with the simulated human pupil and iris is pushed toward the corner of the eye (13) by the push rod (10), the pressure value of the pressure sensor is monitored by the eye parameter evaluation device. When the calibrator contacts the reflector (12) and the pressure value is constant, it is determined that the calibrator has been pushed into place.

8. The method for calibrating and determining eye movement as described in claim 6 or 7, characterized in that, When the eye parameter assessment device acquires images of the eye movement calibration object (15) and calculates the value of eye movement, the value of eye movement is obtained by averaging multiple measurements.

9. The method for calibrating and determining eye movement as described in claim 6 or 7, characterized in that, The calibration value of eye movement is the angle between the axis of the hemisphere and the line connecting the center of the simulated human pupil and the center of the hemisphere in a calibration object at a certain preset angle, obtained by a third-party metrology institute.

10. The method for calibrating and determining eye movement as described in claim 6 or 7, characterized in that, The set value is 5 degrees.

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