An apparatus for measuring and analyzing visual persistence

Abstract

The application discloses a device for measuring and analyzing visual persistence, which comprises a shell, a viewing port is formed in one side of the shell, a supporting structure for supporting the head of a user is installed on the viewing port, a fixation mark is arranged on the inner wall of the shell and corresponds to the position of the viewing port, a single-point light source is installed in the shell, a moving mechanism for driving the single-point light source to move is arranged between the single-point light source and the shell, and a main control chip is arranged at the bottom of the shell and used for controlling the on-off of the single-point light source. The application relates to the technical field of visual detection, and the approximate spherical dark environment can eliminate the interference of external stray light and head position movement, ensure the consistency and repeatability of test conditions, the single-point light source can realize linear movement, radial diffusion, sequence stimulation and other visual scenes, the adjustable range of parameters is wide, and the multidimensional characteristics of visual persistence can be comprehensively evaluated.

Description

Beneficial effects

[0001] The user places their head on the jaw support and forehead rest, and their face is covered by the shell. The near-spherical dark environment can eliminate external stray light and interference from head movement, ensuring the consistency and repeatability of test conditions.

[0002] The single-light point source can achieve various visual scenarios such as linear movement, radial diffusion, and sequential stimulation through the X-axis movement module, Y-axis movement module, and crossbar. The parameters are adjustable over a wide range, and the multi-dimensional characteristics of visual persistence can be comprehensively evaluated.

[0003] Using objective physiological monitoring modules and subjective response modules, subjective response data can be collected simultaneously with objective eye movement, pupillary response, and nystagmus data, enabling quantitative measurement of visual persistence and correlation analysis of physiological mechanisms, thereby improving the accuracy and reliability of test results.

[0004] This design is simple to use. Subjects only need to fix their head position and give simple responses. Operators can complete the test plan settings and view the results through the host computer, which lowers the threshold for use. Technical Field

[0005] This invention relates to the field of visual inspection technology, specifically to a device for measuring and analyzing visual persistence. Background Technology

[0006] Visual persistence is one of the core physiological phenomena of the human visual system, referring to the phenomenon that visual perception persists for a period of time after light stimulation ceases to act on the retina. Its physiological mechanism is directly related to the photochemical bleaching and regeneration processes of rhodopsin and retinal in retinal photoreceptor cells: when light shines on the retina, rhodopsin undergoes photochemical bleaching, converting into retinal and triggering neural electrical signals; when the light disappears, rhodopsin needs a certain amount of time to regenerate, during which time visual perception continues, thus forming the visual persistence effect.

[0007] The normal human visual persistence time is approximately 0.3 seconds, which is affected by various factors such as optic nerve function, retinal condition, individual age differences, and ambient lighting conditions. When the optic nerve or retina is diseased (such as optic neuritis, retinitis pigmentosa, macular degeneration, etc.), or when an individual engages in occupations that require extremely high visual response speed, such as high-speed movement, high-altitude work, or precision operations, the visual persistence time will change significantly, thus affecting the accuracy of visual perception and reaction speed.

[0008] Currently, the detection of visual persistence has important applications in clinical ophthalmology, occupational health assessment, and sports vision research, but existing detection equipment and methods have the following significant drawbacks: 1. Insufficient standardization of the testing environment: Most testing equipment cannot provide a closed, interference-free dark environment, and stray light from the outside can easily affect the visual perception of the subjects; at the same time, there is a lack of precise head fixation and distance fixing devices, and the movement of the subject's head will cause changes in the testing distance and viewing angle, thus introducing systematic errors.

[0009] 2. Limited Stimulus Light Source Parameters: Existing devices mostly use fixed types and parameters of light sources, which cannot achieve flexible adjustment of light source type (laser, infrared light, incandescent light, LED, etc.), spot size, color, brightness, movement speed and trajectory. It is difficult to simulate visual stimuli in different scenarios and cannot fully evaluate the multi-dimensional characteristics of visual persistence.

[0010] 3. Lack of objectivity in data collection: Traditional testing mainly relies on the subject's subjective verbal response, lacking the synchronous collection of objective physiological data such as eye movement, pupillary light reflex, and nystagmus. This makes the test results susceptible to the influence of the subject's subjective judgment bias, distraction, and other factors, resulting in low reliability and repeatability.

[0011] 4. Low level of automation in analysis and reporting: Existing systems mostly rely on manual data recording and manual analysis of results, which cannot achieve real-time processing, statistical analysis, and standardized graphic report generation of test data. This results in low testing efficiency and makes it difficult to meet the standardization requirements of clinical and occupational assessments.

[0012] 5. Insufficient system integration: Each functional module (light source control, eye-tracking monitoring, response acquisition, and data analysis) is independent of each other, lacks a unified overall control and scheduling mechanism, has poor timing synchronization, and cannot achieve linkage analysis of subjective and objective data. Summary of the Invention

[0013] To address the shortcomings of existing technologies, this invention provides a device for measuring and analyzing visual persistence, which solves the problems that existing visual persistence detection technologies are not perfect, the detection results are not comprehensive, and they are prone to errors.

[0014] To achieve the above objectives, the present invention provides the following technical solution: a device for measuring and analyzing visual persistence, comprising: The housing has an observation port on one side, and a support structure for supporting the user's head is installed on the observation port. A gaze marker is provided on the inner wall of the housing corresponding to the position of the observation port. The support structure is an arc-shaped headrest, which is installed on the observation port using a damping pivot connection method; The shell is a spherical shell with an inner wall coated with a matte black light-absorbing material, the light absorption rate of which is ≥98%. A single-light point light source is installed inside the housing, and a moving mechanism for moving the single-light point light source is provided between the single-light point light source and the housing. The main control chip, located at the bottom of the housing, is used to control the on / off state of the single-point light source.

[0015] In some embodiments, the support structure may further be: A forehead support, which is installed on the upper wall of the observation port; A fixed sleeve is installed on the lower wall of the observation port. A support rod is slidably fitted inside the fixed sleeve in the vertical direction, and a jaw frame is installed at the upper end of the support rod. A rotating shaft is rotatably mounted on the bottom of the fixed sleeve and connected to a lead screw. The lead screw is threadedly engaged with the support rod, and a first bevel gear is fitted onto the outside of the rotating shaft. A rotating rod is rotatably engaged with the fixed sleeve. A second bevel gear and a knob are respectively installed at both ends of the rotating rod, and the second bevel gear meshes with the first bevel gear.

[0016] In some embodiments, the moving mechanism includes: a speed reducer, the speed reducer being mounted on the housing and having a ring mounted on its rotating end, the ring being fixedly sleeved on the outside of the gaze target, the ring being connected to a crossbar, and the number of single-light point sources being several and axially arranged on the crossbar.

[0017] In some embodiments, the mobility mechanism further includes: Y-axis moving module, wherein the Y-axis moving module is longitudinally disposed within the housing; The X-axis moving module is arranged laterally within the housing and moves in coordination with the Y-axis moving module. The single-point light source moves in coordination with the X-axis moving module.

[0018] In some embodiments, the housing further includes: An objective physiological monitoring module, comprising a high-speed infrared camera and a high-speed camera, wherein the high-speed infrared camera is used to acquire images of eye movement and the high-speed camera is used to acquire images of pupil and nystagmus; A subjective response module, located outside the housing and consisting of a button handle and a host computer, is used for user subjective response operations.

[0019] In some embodiments, the host computer includes a real-time display panel, a graphic report generation panel, and a printing panel; The real-time display panel includes: Light source parameter panel: Real-time display of the current single light source type, brightness, color, spot size, and movement speed parameters; Physiological data panel: Real-time plotting of eye movement trajectory, pupil diameter change curve, and nystagmus waveform; Response data panel: Displays response time, response result, and dwell time calculation result in real time; The graphic report generation panel is used to print the user's graphic report, which includes the subject's basic information, test environment parameters, light source stimulation scheme, subjective and objective data statistics, trend charts, and clinical interpretation suggestions. The printing panel supports connecting to a printer to directly output paper reports or exporting them to a medical information system for archiving.

[0020] In some embodiments, the main control chip is electrically connected to the single-light point source, the Y-axis motion module, the X-axis motion module, the speed reducer, the objective physiological monitoring module, the subjective response module, the high-speed infrared camera, and the high-speed camera via wired or wireless communication.

[0021] In some embodiments, the single-point light source includes at least one of laser, infrared light, incandescent light, and LED light source.

[0022] In some embodiments, the main control chip may also be a PLC, which is used to program the on / off mode of the single-point light source.

[0023] In some embodiments, a limiting groove is axially formed on the inner wall of the fixed sleeve, and a limiting slider is fixedly installed on the outer wall of the support rod, with the limiting slider slidingly engaged with the limiting groove. Attached Figure Description

[0024] Figure 1 This is the front view of the present invention.

[0025] Figure 2 This is a schematic diagram of the structure of the fixing sleeve of the present invention.

[0026] Figure 3 This is a schematic diagram of the crossbar structure of the present invention.

[0027] Figure 4 This is a schematic diagram showing the positions of the Y-axis moving module and the X-axis moving module of the present invention.

[0028] In the diagram: 1. Housing; 2. Gazing target; 3. Observation port; 4. Single-light point source; 5. Main control chip; 6. Fixing sleeve; 7. Limiting slider; 8. Support rod; 9. Lead screw; 10. Rotating shaft; 11. First bevel gear; 12. Second bevel gear; 13. Knob; 14. Rotating rod; 15. Jaw frame; 16. Forehead support; 17. Reducer; 18. Ring; 19. Crossbar; 20. Y-axis moving module; 21. X-axis moving module; 22. Button handle; 23. Host computer; 24. High-speed infrared camera; 25. High-speed camera. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figure 1-4 The present invention provides a technical solution: a device for measuring and analyzing visual persistence, comprising: like Figure 1 As shown, the housing 1 has an observation port 3 on one side, and a support structure for supporting the user's head is installed on the observation port 3. A gaze marker 2 is set on the inner wall of the housing 1 corresponding to the position of the observation port. The support structure is an arc-shaped headrest, which is installed on the observation port 3 by a damping pivot connection. The housing 1 is a spherical shell, and the inner wall is coated with a matte black light-absorbing material with a light absorption rate of ≥98%. A single light source 4 is installed inside the housing 1, and a moving mechanism is provided between the single light source 4 and the housing 1 to move the single light source 4. A main control chip 5 is located at the bottom of the housing 1 and is used to control the brightness of the single light source 4.

[0031] The spherical shell, combined with a matte black light-absorbing material with an absorption rate of ≥98%, maximizes the absorption of stray light, avoiding interference from external light and internal reflected light, ensuring that the light from the single-light point source 4 is the sole visual stimulus, and improving the accuracy of visual persistence measurement. The arc-shaped headrest, connected by a damping pivot, can be flexibly adjusted in angle and position according to the user's head size, achieving stable head support and avoiding gaze deviation caused by head shaking during measurement, thus ensuring the stability of measurement data. The main control chip 5 precisely controls the on / off state of the single-light point source 4, enabling stimulation modes with different on / off frequencies and durations, adapting to the visual persistence measurement needs in different scenarios, and providing a reliable light source control foundation for subsequent data acquisition and analysis.

[0032] The main control chip 5 adopts an STM32F407 embedded main control chip + Linux embedded operating system architecture to realize unified scheduling and timing synchronization of the entire device.

[0033] The main control chip 5 can also be a PLC, which is used to program the on / off state of the single-point light source 4. like Figure 2 As shown, in some embodiments, the support structure may also be: Forehead support 16, which is installed on the upper wall of observation port 3; A fixed sleeve 6 is installed on the lower wall of the observation port 3. A support rod 8 is slidably fitted inside the fixed sleeve 6 in the vertical direction. A jaw frame 15 is installed at the upper end of the support rod 8. A rotating shaft 10 is rotatably mounted on the bottom of a fixed sleeve 6 and connected to a lead screw 9. The lead screw 9 is threadedly engaged with a support rod 8. A first bevel gear 11 is fitted on the outside of the rotating shaft 10. Rotating rod 14 is rotatably engaged with fixed sleeve 6. A second bevel gear 12 and a knob 13 are respectively installed at both ends of rotating rod 14. The second bevel gear 12 and the first bevel gear 11 are meshed and connected.

[0034] The support structure eliminates the influence of the subject's head movement on the test results through the double fixation of the jaw frame 15 and the forehead support 16; the spherical dark environment provides a uniform and interference-free visual stimulus background to ensure the purity of the light source stimulus signal; the fixation target 2 guides the subject to maintain continuous central fixation and avoids visual perception deviation caused by eyeball deflection.

[0035] An alternative adjustable support structure is provided, with the forehead rest 16 and chin rest 15 working together to fix the vertical position of the head, adapting to users of different heights and head shapes, thus expanding the applicable population of the device; by rotating the knob on the rotating rod 14, the bevel gear transmission drives the lead screw 9 to rotate, which in turn drives the support rod 8 to rise and fall along the fixed sleeve 6, providing high adjustment precision and convenient operation. It can accurately adjust the relative position of the user's eyes with the gaze target and the single-light point light source 4, ensuring that the gaze angle meets the measurement standard, reducing measurement errors caused by head position deviations, and further improving the accuracy of the measurement.

[0036] like Figure 3 As shown, in some embodiments, the moving mechanism includes: a reducer 17, the reducer 17 is mounted on the housing 1 and a ring 18 is mounted on the rotating end, the ring 18 is sleeved on the outside of the gaze target 2, the ring 18 is connected to a crossbar 19, and the number of single light source 4 is several and axially arranged on the crossbar 19.

[0037] Several single-light point light sources 4 located on the crossbar 19 can be independently controlled to turn on or off or to turn on and off sequentially.

[0038] The reducer 17 can precisely control the rotation speed and angle of the ring 18, avoiding visual stimulation instability caused by excessive rotation speed, while also enabling adjustable rotation speed to adapt to the requirements of light source movement speed in different measurement scenarios; several single-light point light sources 4 are axially arranged on the crossbar 19, and together with the ring 18 rotating around the gaze target, the single-light point light sources 4 can make circular motion around the gaze point, simulating visual stimulation in different directions and trajectories, which can comprehensively measure the visual persistence characteristics of users under different visual trajectories, enrich the measurement dimensions, and improve the comprehensiveness of the measurement results.

[0039] like Figure 4 As shown, in some embodiments, the moving mechanism further includes a Y-axis moving module 20, which is longitudinally disposed within the housing 1; X-axis moving module 21 is arranged horizontally inside housing 1 and moves in coordination with Y-axis moving module 20. Single light source 4 moves in coordination with X-axis moving module 21.

[0040] The X-axis moving module 21 and the Y-axis moving module 20 work together to realize the two-dimensional movement of the single light source 4 in the horizontal and vertical directions. Combined with the circular motion of the ring 18, the single light source 4 can achieve flexible movement in multiple directions and multiple trajectories, which can simulate more complex visual scenes and meet different types of visual persistence measurement needs.

[0041] The single-light point source 4 includes three switchable stimulation modes: 1. Single-point moving light source, supporting single-point light sources such as laser (650nm red light), infrared light (850nm), incandescent light, and RGB LED; the light source is mounted on the Y-axis moving module 20 and the X-axis moving module 21, with lateral and longitudinal movement capabilities, equipped with an electric zoom lens group and an adjustable aperture, capable of achieving a light spot diameter (1110mm), color (RGB full color gamut), and brightness (0.11000cd / m²). 2 Continuous modulation; used to test persistence response to linear moving visual stimuli and assess the duration of a subject's perception of dynamic visual signals; 2. Annular diffusion light source, supporting single light source such as laser (650nm red light), infrared light (850nm), incandescent light, RGBLED, etc. Several single light source 4 are arranged horizontally on a horizontal bar 19 that can rotate around the gaze target 2. The light source moves at a uniform or variable speed along the annular track by the sequential lighting and extinguishing of the single light source 4. It is used to test the persistence response under radial diffusion visual stimulation and simulate the visual perception characteristics under the scene of visual field expansion. 3. A horizontal array light source supports single-point light sources such as laser (650nm red light), infrared light (850nm), incandescent light, and RGB LED. Several single-point light sources 4 are arranged horizontally on a horizontal bar 19 that can rotate around the gaze target 2. The horizontal bar 19 is driven to rotate by a reducer 17, and the rotation speed is adjustable (0.1-5r / s). The lighting sequence and brightness of each light point can be independently controlled. The lights can be set to light on and off sequentially (from one end of the arm to the other) or randomly, to achieve sequential visual stimulation. The rotation speed and the lighting sequence of the lights can be adjusted synchronously to simulate dynamic visual signals of different frequencies. It is used to test the persistence response under sequential visual stimulation and to evaluate the subject's ability to integrate high-frequency visual signals.

[0042] In some embodiments, the housing 1 further includes: The objective physiological monitoring module consists of a high-speed infrared camera 24 and a high-speed camera 25. The high-speed infrared camera 24 is used to acquire images of eye movement, and the high-speed camera 25 is used to acquire images of pupil and nystagmus. A 120fps high-speed infrared camera 24 is used, which is installed on the side of the observation window and the distance between the camera and the subject's eyes is fixed at 30cm. The pupil is illuminated by an infrared light source to collect images of eye movement and calculate the center position of the eyeball, the direction of gaze, and the eye movement trajectory in real time to ensure that the subject always maintains central gaze. Pupil images are acquired using a high-speed camera 25, the pupil diameter change rate is calculated in real time, the time delay and amplitude of pupil contraction or dilation after light source stimulation are recorded, the light response function of the retina and optic nerve is assessed, and the frequency, amplitude and duration of nystagmus are identified through eye movement trajectory data analysis, which can be used to assist in the assessment of vestibular visual function and neurological lesions.

[0043] The subjective response module, located outside the housing 1, consists of a button handle 22 and a host computer 23, and is used for the user's subjective response operation.

[0044] The button handle 22 can be a wireless button device or a mobile phone / tablet APP. Users can subjectively judge and respond to the appearance or disappearance of light source stimuli, movement direction, trajectory changes, etc. by operating the button or touch screen. The host computer 23 system records the response time (the time difference from the end of the stimulus to the trigger of the response) and the response result in real time. It is linked with objective physiological data to calculate the visual persistence time (subjective response time - objective light stimulus end time). The host computer 23 system monitors the test dynamics in real time, records information such as changes in light source parameters, subject gaze state, and response sequence, and generates test logs to ensure that the test process is traceable.

[0045] In some embodiments, the host computer 23 includes a real-time display panel, a graphic report generation panel, and a printing panel; The real-time display panel includes: Light source parameter panel: Real-time display of the current single light source type, brightness, color, spot size, and movement speed parameters; Physiological data panel: Real-time plotting of eye movement trajectory, pupil diameter change curve, and nystagmus waveform; Response data panel: Displays response time, response result, and dwell time calculation result in real time; The graphic report generation panel is used to print the user's graphic report, which includes the subject's basic information, test environment parameters, light source stimulation plan, subjective and objective data statistics, trend charts, and clinical interpretation suggestions. After the test is completed, the system automatically extracts the test data, fills in the report template, and generates a PDF report; The printing panel supports connecting to a printer to directly output paper reports or exporting them to a medical information system for archiving.

[0046] The real-time display panel can simultaneously visualize light source parameters, physiological data, and response data, facilitating operators to monitor the measurement process in real time, promptly identify and adjust any abnormalities, and ensure the smooth progress of the measurement process. The graphic report generation panel can automatically integrate all measurement data to generate graphic reports containing multi-dimensional information and clinical interpretation suggestions, eliminating the need for manual processing, improving work efficiency, and providing clear and comprehensive data support for clinical diagnosis and scientific research analysis. The printing panel supports paper report output and archiving in medical information systems, adapting to the data management needs of medical, scientific research, and other scenarios, enhancing the practicality and applicability of the device, and achieving standardized management of measurement data.

[0047] In some embodiments, the housing 1 is a spherical shell with an inner wall coated with a matte black light-absorbing material, the light absorption rate of which is ≥98%; the bottom of the spherical shell is a conical pedestal.

[0048] In some embodiments, the single-light point source 4 includes at least one of laser, infrared light, incandescent light, and LED light source.

[0049] In some embodiments, the main control chip 5 is electrically connected to the single-light point source 4, the Y-axis motion module 20, the X-axis motion module 21, the reducer 17, the objective physiological monitoring module and the subjective response module, as well as the high-speed infrared camera 24 and the high-speed camera 25 via wired or wireless communication.

[0050] The main control chip 5 communicates via RS485, USB, Bluetooth / WiFi, etc., with a timing synchronization accuracy of ≤1ms.

[0051] The main control chip 5 and the single-light point source 4 are connected via an RS485 bus to send control commands such as light source type, brightness, color, spot size, and moving speed. The main control chip 5 is connected to the physiological monitoring module via a USB 3.0 interface to receive physiological data such as eye movement, pupil size, and nystagmus. The main control chip 5 connects to the subjective response module via Bluetooth 5.0 or WiFi to receive response signals; The main control chip 5 transmits test data and control commands to the host computer 23 via Ethernet or USB interface.

[0052] In some embodiments, a limiting groove is axially formed on the inner wall of the fixed sleeve 6, and a limiting slider 7 is fixedly installed on the outer wall of the support rod 8, with the limiting slider 7 slidingly engaging with the limiting groove.

[0053] The sliding engagement between the limiting slider 7 and the limiting groove can limit and guide the lifting and lowering movement of the support rod 8, preventing the support rod 8 from shifting or rotating during the lifting and lowering process, and ensuring the stability of the jaw frame position.

[0054] Example 1: Visual persistence measurement in single-spot moving mode; The user sits in front of the device and turns knob 13. Knob 13 drives the second bevel gear 12 to rotate via lever 14. The second bevel gear 12 drives the rotating shaft 10 to rotate via the first bevel gear 11 that meshes with it. The rotating shaft 10 drives the upper lead screw 9 to rotate, which in turn drives the support rod 8 to rise or fall, thereby adjusting the height of the jaw frame 15. Then the user's chin and forehead can rest on the jaw frame 15 and forehead support 16 respectively. At this time, the user's face is against the observation port 3, and the eyes need to be focused on the gaze target 2.

[0055] At this time, high-speed infrared camera 24 and high-speed camera 25 are activated to collect eye physiological data and transmit it to host computer 23 as initial data.

[0056] Then, the single-light source 4 is activated to stimulate the user's eyes with a single light point, and visual persistence measurement is performed. During the measurement, the Y-axis movement module 20 or the X-axis movement module 21 is activated respectively, so that the single-light source 4 can move laterally or vertically. The stimulation duration of the single-light source 4 is 2 seconds. After the stimulation ends, a response prompt is triggered 0.5 seconds later. The user responds via the button handle 22 to whether they can still see the light point. During this process, the high-speed infrared camera 24 and the high-speed camera 25 continue to collect eye physiological data and transmit it to the host computer 23. The host computer 23 records the stimulation end time, response time, pupillary response data, and eye movement data. This process needs to be repeated 10 times, and the average value is taken as the final result.

[0057] Finally, the user's graphic report is printed through the graphic report generation panel of the host computer 23.

[0058] In this technical solution, when a subject sees a moving light spot, as the rotation speed increases, they will see an arc-shaped line. When the speed is even faster, the two ends appear to form a loop. The subject can then respond, and the speed value is recorded. When the loop disappears, the subject responds again, and a persistence of vision value is recorded. This allows for dual-number support for result analysis. Example 2: Visual persistence measurement in annular diffusion mode; The preliminary preparation work is the same as in Example 1. After the user's face is placed on the observation port 3, the eyes need to be focused on the gaze target 2. The high-speed infrared camera 24 and high-speed camera 25 are activated to collect eye physiological data and transmit it to the host computer 23 as initial data.

[0059] Then, the single-light point light source 4 is activated to stimulate the user's eyes with a single light point for visual persistence measurement. During the measurement, the reducer 17 is activated, and the reducer 17 drives the horizontal bar 19 to rotate around the fixation target 2 via the collar 18. Since the single-light point light sources 4 are arranged horizontally along the extension line of the horizontal bar 19 and there are several of them, during the uniform rotation of the horizontal bar 19, the single-light point light sources 4 on the horizontal bar 19 will light up and turn off sequentially from the side located at the collar 18 to the side away from the collar 18. Under the rotation of the horizontal bar 19, a ring diffusion pattern will be formed. The stimulation duration of the single-light point light source 4 is 3 seconds. After the response prompt is triggered 0.8 seconds after the stimulation ends, the user responds via the button handle 22 to whether the complete ring light spot can still be seen. During this process, the high-speed infrared camera 24 and the high-speed camera 25 will continue to collect eye physiological data and transmit it to the host computer 23. The host computer 23 will record the stimulation end time, response time, pupillary response data, and eye movement data. This process needs to be repeated 8 times, and the average value is taken as the final result.

[0060] Finally, the user's graphic report is printed through the graphic report generation panel of the host computer 23.

[0061] Example 3: Visual persistence measurement in horizontal arm LED array mode; The preliminary preparation work is the same as in Example 1. After the user's face is placed on the observation port 3, the eyes need to be focused on the gaze target 2. The high-speed infrared camera 24 and high-speed camera 25 are activated to collect eye physiological data and transmit it to the host computer 23 as initial data.

[0062] Then, the single-light source 4 is activated to stimulate the user's eyes with a single light source for visual persistence measurement. During the measurement, the reducer 17 is activated, which drives the horizontal bar 19 to rotate around the fixation target 2 via the collar 18. During the rotation of the horizontal bar 19, several single-light source sources 4 on the horizontal bar 19 randomly start to light up and turn off at a frequency of 10Hz. At the rotation speed of the horizontal bar 19 of 1r / s, a ring diffusion pattern is formed. The stimulation duration of the single-light source 4 is 3 seconds. After the response prompt is triggered 0.8 seconds after the stimulation ends, the user responds via the button handle 22 to whether they can still see the continuous light band. During this process, the high-speed infrared camera 24 and the high-speed camera 25 continue to collect eye physiological data and transmit it to the host computer 23. The host computer 23 records the stimulation end time, response time, pupillary response data, and eye movement data. This process needs to be repeated 12 times, and the average value is taken as the final result.

[0063] Finally, the user's graphic report is printed through the graphic report generation panel of the host computer 23.

[0064] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined by..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0065] It is worth noting that all standard parts used in this invention can be purchased from the market, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods of each part all adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The models of electrical structure equipment involved can be selected according to the user's needs, as long as they meet the requirements of this application. In addition, the circuit connection adopts conventional connection methods in the prior art. The supporting electrical structures such as the control, current detection, position feedback, predicted voltage synchronization and parameter adjustment of the electrical equipment are all existing technologies, such as PLC controllers and module structures, so they will not be described in detail here.

[0066] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for measuring and analyzing visual persistence, characterized in that, include: The housing (1) has an observation port (3) on one side, and a support structure for supporting the user's head is installed on the observation port (3). A gaze marker (2) is provided on the inner wall of the housing (1) and corresponding to the position of the observation port. The support structure is an arc-shaped headrest, which is installed on the observation port (3) using a damping rotating shaft connection. The shell (1) is a spherical shell with an inner wall coated with a matte black light-absorbing material, the light absorption rate of which is ≥98%. A single light source (4) is installed inside the housing (1), and a moving mechanism for moving the single light source (4) is provided between the single light source (4) and the housing (1). The main control chip (5) is located at the bottom of the housing (1) and is used to control the brightness of the single light source (4).

2. The device for measuring and analyzing visual persistence according to claim 1, characterized in that, The supporting structure may also be: Forehead support (16), the forehead support (16) is installed on the upper wall of the observation port (3); A fixed sleeve (6) is installed on the lower wall of the observation port (3). A support rod (8) is slidably fitted inside the fixed sleeve (6) in the vertical direction. A jaw frame (15) is installed at the upper end of the support rod (8). A rotating shaft (10) is rotatably mounted on the bottom of the fixed sleeve (6) and connected to a lead screw (9). The lead screw (9) is threadedly engaged with the support rod (8). A first bevel gear (11) is fitted on the outside of the rotating shaft (10). Rotating rod (14) is rotatably engaged with fixed sleeve (6). A second bevel gear (12) and a knob (13) are respectively installed at both ends of the rotating rod (14). The second bevel gear (12) meshes with the first bevel gear (11).

3. The device for measuring and analyzing visual persistence according to claim 1, characterized in that, The moving mechanism includes: a speed reducer (17), which is mounted on the housing (1) and has a ring (18) mounted on its rotating end. The ring (18) is fixedly sleeved on the outside of the gaze target (2). The ring (18) is connected to a crossbar (19). The number of single light source (4) is several and they are axially arranged on the crossbar (19).

4. The device for measuring and analyzing visual persistence according to claim 3, characterized in that, The mobile mechanism also includes: Y-axis moving module (20), the Y-axis moving module (20) is longitudinally arranged inside the housing (1); X-axis moving module (21), which is arranged laterally in the housing (1) and moves in coordination with the Y-axis moving module (20), and the single light source (4) moves in coordination with the X-axis moving module (21).

5. The device for measuring and analyzing visual persistence according to claim 4, characterized in that, The housing (1) also contains: An objective physiological monitoring module is composed of a high-speed infrared camera (24) and a high-speed camera (25). The high-speed infrared camera (24) is used to acquire images of eye movement, and the high-speed camera (25) is used to acquire images of pupils and nystagmus. The subjective response module is located outside the housing (1) and consists of a button handle (22) and a host computer (23) for user subjective response operation.

6. The apparatus for measuring and analyzing visual persistence according to claim 5, characterized in that, The host computer (23) includes a real-time display panel, a graphic report generation panel, and a printing panel; The real-time display panel includes: Light source parameter panel: Real-time display of the current single light source type, brightness, color, spot size, and movement speed parameters; Physiological data panel: Real-time plotting of eye movement trajectory, pupil diameter change curve, and nystagmus waveform; Response data panel: Displays response time, response result, and dwell time calculation result in real time; The graphic report generation panel is used to print the user's graphic report, which includes the subject's basic information, test environment parameters, light source stimulation scheme, subjective and objective data statistics, trend charts, and clinical interpretation suggestions. The printing panel supports connecting to a printer to directly output paper reports or exporting them to a medical information system for archiving.

7. The apparatus for measuring and analyzing visual persistence according to claim 6, characterized in that, The main control chip (5) is electrically connected to the single light source (4), the Y-axis moving module (20), the X-axis moving module (21), the reducer (17), the objective physiological monitoring module, the subjective response module, the high-speed infrared camera (24), and the high-speed camera (25) via wired or wireless communication.

8. The device for measuring and analyzing visual persistence according to claim 1, characterized in that, The single-light point source (4) includes at least one of laser, infrared light, incandescent light and LED light source.

9. The device for measuring and analyzing visual persistence according to claim 1, characterized in that, The main control chip (5) can also be a PLC, which is used to program the on / off state of the single light source (4).

10. The apparatus for measuring and analyzing visual persistence according to claim 2, characterized in that, A limiting groove is axially formed on the inner wall of the fixed sleeve (6), and a limiting slider (7) is fixedly installed on the outer wall of the support rod (8). The limiting slider (7) slides in cooperation with the limiting groove.

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