Visual function examination training instrument

Abstract

The invention discloses a visual function examination training instrument, and relates to the technical field of visual light equipment, the visual function examination training instrument comprises a casing, liquid lenses and a first display screen, the casing is provided with a first hole and a second hole respectively corresponding to the left eye and the right eye of a human body, the first hole and the second hole are both provided with the liquid lenses, and the casing is internally provided with the first display screen. A screen of the first display screen is located in a visible range of the liquid lens, and the liquid lens is electrically connected with electric control equipment used for adjusting supply voltage; according to the principle that the diopters of the liquid lens are different under different voltages, the diopter change of the liquid lens can be controlled by utilizing the electric control equipment, so that smooth zooming, step zooming and jump zooming operations of the liquid lens are completed, the adjustment range, the adjustment precision and the adjustment speed are greatly improved, and the inspection efficiency and the training effect are improved.

Description

Technical Field

[0001] The invention relates to the technical field of ophthalmic optometry equipment, in particular to a visual function testing and training instrument. Background Art

[0002] Eyes are one of the important organs of the human body, and their visual health is the focus of attention. However, visual dysfunction is a serious threat to human visual health. Common visual dysfunctions include amblyopia, fusion deficiency, pseudomyopia, presbyopia, etc.

[0003] For the above-mentioned visual function abnormalities, a better treatment method is to use a comprehensive visual function examination and training instrument to perform personalized visual function examination and training. The commonly used visual function examination and training instrument mainly includes an eyepiece disk and a display screen. The eyepiece disk is a disk-shaped disk on which a plurality of lenses distributed in a circular shape are arranged. The refractive powers of the plurality of lenses are different. The eyepiece disk is driven by a motor to rotate, thereby switching lenses of different refractive powers to correspond to the human eye, thereby completing the inspection and training operations. However, the refractive power and number of the lenses limit the adjustment range of the visual function examination and training instrument, which leads to the problem of poor inspection and training effects.

[0004] Therefore, people are in urgent need of a visual function inspection and training instrument with a large adjustment range and good inspection and training effect. Summary of the invention

[0005] The purpose of the present invention is to provide a visual function inspection training instrument to solve the problems existing in the above-mentioned prior art. By replacing the eyepiece disc with a liquid lens, the adjustment range, accuracy and speed can be effectively improved, which is conducive to improving inspection efficiency and training effect.

[0006] To achieve the above-mentioned purpose, the present invention provides the following solution: The present invention provides a visual function test training instrument, including a casing, a liquid lens, and a first display screen. The casing is provided with a first hole and a second hole corresponding to the left eye and the right eye of the human body respectively. The first hole and the second hole are both provided with liquid lenses. The first display screen is provided inside the casing. The screen of the first display screen is located within the visible range of the liquid lens. The liquid lens is electrically connected to an electronic control device for adjusting the supply voltage.

[0007] Preferably, the first display screen is installed inside the casing via a mounting bracket, the mounting bracket is in a square cylindrical shape, and heat dissipation holes are provided on the mounting bracket and the casing.

[0008] Preferably, a frustum-shaped darkroom tube is provided between the liquid lens and the first display screen, one end of the darkroom tube is buckled around the first display screen, and the other end is buckled around the lens of the liquid lens.

[0009] Preferably, the first hole and the second hole are both horizontally arranged waist-shaped holes or strip-shaped holes, the liquid lens is connected to the housing through a pupil distance adjustment mechanism, and the two liquid lenses move toward or away from each other in the first hole and the second hole respectively.

[0010] Preferably, the visual function test training instrument also includes a shading plate for blocking the first hole or the second hole during the movement of the liquid lens, the shading plate is provided at the first hole and the second hole, the shading plate is provided with a through hole matching the liquid lens, the liquid lens is arranged in the through hole, and the shading plate is connected to the pupil distance adjustment mechanism.

[0011] Preferably, the pupil distance adjustment mechanism includes a slider and a screw, the two liquid lenses are respectively fixedly connected to the slider, a threaded hole is provided on the slider, the screw is rotatably arranged on the housing, the screw includes a first thread segment and a second thread segment with opposite threads, the sliders arranged on the two liquid lenses are respectively threadedly connected to the first thread segment and the second thread segment, one end of the screw passes through the housing to form a force-applying rotating portion, and a limiting mechanism is arranged on the periphery of the slider to prevent it from rotating around the screw.

[0012] Preferably, a light source with adjustable brightness is disposed in the housing, and the light source is disposed toward the first display screen.

[0013] Preferably, the side wall of the housing is provided with a second display screen for displaying inspection training data and operating the instrument.

[0014] Preferably, an eye tracking module for monitoring eye movements is provided in the housing, and the eye tracking module is electrically connected to the data processing and control module.

[0015] Preferably, an eyepiece disc for switching between different lenses is provided inside the liquid lens.

[0016] Compared with the prior art, the present invention mainly achieves the following technical effects:

[0017] Based on the principle that the refractive power of the liquid lens is different under different voltages, the electronic control equipment can be used to control the change in the refractive power of the liquid lens, thereby completing the smooth zoom, step zoom and jump zoom operations of the liquid lens, greatly improving the adjustment range, accuracy and speed, which is beneficial to improving inspection efficiency and training effects; in addition, the volume of the liquid lens itself is smaller than the volume of the eyepiece disk, which is beneficial to reducing the space occupancy of the overall instrument, and maintenance is also relatively convenient, while the noise generation is low.

[0018] Compared with the prior art, other solutions of the present invention have achieved the following technical effects:

[0019] The setting of the heat dissipation holes can increase the service life of the instrument. At the same time, the darkroom tube can prevent the ambient light that penetrates into the casing through the heat dissipation holes from affecting the inspection and training effect.

[0020] On the basis of providing the pupil distance adjustment mechanism, the provision of the shading plate can prevent external ambient light from entering the housing through the first hole or the second hole, which is beneficial to improving the inspection training effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 This is a schematic diagram of the structure of the visual function test training instrument in this embodiment;

[0023] Figure 2 This is a front view of the visual function test training instrument in this embodiment;

[0024] Figure 3 This is a top view of the visual function test training device in this embodiment after the top wall of the housing is hidden;

[0025] Figure 4 This is a schematic diagram of the structure of the visual function test training instrument in this embodiment after the top wall of the casing is hidden;

[0026] Figure 5 This is a schematic diagram of the internal structure of the visual function test training instrument in this embodiment after the top wall of the casing and the darkroom tube are hidden;

[0027] Figure 6 is a structural schematic diagram of a pupil distance adjustment mechanism in another embodiment;

[0028] Figure 7 is a structural schematic diagram of a pupil distance adjustment mechanism in another embodiment;

[0029] Figure 8 is a structural schematic diagram of a pupil distance adjustment mechanism in another embodiment;

[0030] Among them, 1. housing; 2. liquid lens; 3. first display screen; 4. first hole; 5. second hole; 6. USB interface; 7. mounting bracket; 8. heat dissipation hole; 9. darkroom tube; 10. sunshade; 11. slider; 12. screw rod; 13. force-applying rotating part; 14. rotating motor; 15. telescopic rod; 16. push block; 17. nose groove; 18. second display screen; 19. base; 20. level; 21. degree display; 22. opening and closing button; 23. indicator light; 24. rubber ring; 25. eyepiece plate; 26. eyepiece motor. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The purpose of the present invention is to provide a visual function inspection training instrument to solve the problems existing in the prior art. By replacing the eyepiece disc with a liquid lens, the adjustment range, accuracy and speed can be effectively improved, which is conducive to improving inspection efficiency and training effect.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Please refer to Figures 1 to 8 As shown, a visual function test training instrument is provided, including a housing 1, a liquid lens 2, and a first display screen 3. The housing 1 is provided with a first hole 4 and a second hole 5 corresponding to the left eye and the right eye of the human body respectively. The first hole 4 and the second hole 5 are both provided with a liquid lens 2. A first display screen 3 is provided inside the housing 1. The screen of the first display screen 3 is located within the visual range of the liquid lens 2. The liquid lens 2 is electrically connected to an electric control device for adjusting a supply voltage. The electric control device can select a voltage-stabilizing power supply that can adjust an output voltage. When the output voltage of the electric control device changes, the liquid lens 2 is zoomed (the diopter changes). In principle, during actual inspection training, the output voltage can be adjusted to control the liquid lens 2 to perform smooth zoom, step zoom and jump zoom operations, and the liquid lens 2 itself has high lens precision, with a minimum precision of 0.005dpt, so the instrument's diopter adjustment range, precision and speed can be greatly improved, which is beneficial to improving inspection efficiency and training effects; in addition, the volume of the liquid lens 2 itself is smaller than the volume of the eyepiece disc, which is beneficial to reducing the space occupancy of the entire instrument, and at the same time can reduce the weight of the entire instrument, making it more convenient to carry, and compared with the eyepiece disc, the liquid lens 2 is more convenient to maintain and has less noise during operation.

[0035] A data connector and a USB interface 6 for importing data into the first display screen 3 are provided on the rear side wall of the housing 1 corresponding to the first display screen 3 .

[0036] In this embodiment, the first display screen 3 is installed inside the casing 1 through a mounting bracket 7. The mounting bracket 7 is in a square cylindrical shape. Both the mounting bracket 7 and the casing 1 are provided with heat dissipation holes 8. The setting of the heat dissipation holes 8 can better dissipate the heat generated by the first display screen 3 during operation, which is beneficial to improving the service life of the first display screen 3.

[0037] When the heat dissipation hole 8 is set, the external ambient light will penetrate into the casing 1 through the heat dissipation hole 8. In order to avoid the influence of ambient light on the inspection training, a frustum-shaped darkroom tube 9 is set between the liquid lens 2 and the first display screen 3. One end of the darkroom tube 9 is buckled around the first display screen 3. Specifically, it can be buckled at the edge of the mounting bracket 7, and the other end is buckled around the lens of the liquid lens 2. The buckling position is tightly fitted, which prevents the external ambient light from entering the darkroom tube 9, thereby improving the inspection training effect.

[0038] An additional light source may be provided, and a high-brightness LED light group may be selected as the light source. The light source is provided inside the casing 1, and the light source is provided toward the first display screen 3. Specifically, the light source may be provided in a darkroom tube 9, and the brightness of the light source may be adjusted. The specific brightness may be controlled by adjusting the current. During the visual function inspection and examination process, appropriate light intensity may be provided according to different inspection items and ambient light conditions. For example, during a low-light vision inspection, the brightness of the light source may be reduced to simulate a nighttime visual environment.

[0039] Since the pupil distance of different human bodies is different, in this embodiment, the first hole 4 and the second hole 5 are both horizontally arranged waist-shaped holes or strip-shaped holes, and the liquid lens 2 is connected to the housing 1 through the pupil distance adjustment mechanism. Under the control of the pupil distance adjustment mechanism, the two liquid lenses 2 move toward or away from each other in the first hole 4 and the second hole 5 respectively, so as to achieve the adjustment of the pupil distance.

[0040] The visual function inspection training instrument also includes a shading plate 10 for blocking the first hole 4 or the second hole 5 during the movement of the liquid lens 2. The shading plate 10 is arranged at the first hole 4 and the second hole 5. The shading plate 10 is provided with a through hole matching the liquid lens 2. The liquid lens 2 is arranged in the through hole. The shading plate 10 is connected to the pupil distance adjustment mechanism. Taking the first hole 4 as an example, when the liquid lens 2 corresponds to any position of the first hole 4, the shading plate 10 blocks other positions of the first hole 4 except the corresponding liquid lens 2. The setting of the shading plate 10 can prevent external ambient light from entering the casing 1 through the first hole 4 or the second hole 5, which is beneficial to improving the inspection training effect.

[0041] In this embodiment, the shading plate 10 is closely disposed on the inner wall surface of the housing 1 .

[0042] In this embodiment, the pupil distance adjustment mechanism includes a slider 11 and a screw 12. The two liquid lenses 2 are fixedly connected to the slider 11 respectively. A threaded hole is provided on the slider 11. The direction of the screw 12 is parallel to the direction of the first hole 4 and the second hole 5. The screw 12 is located in the housing 1. The screw 12 is rotatably arranged on the housing 1 through a bearing. The screw 12 includes a first thread segment and a second thread segment with opposite threads. The sliders 11 arranged on the two liquid lenses 2 are threadedly connected to the first thread segment and the second thread segment respectively. One end of the screw 12 passes through the housing 1 to form a force-applying rotating portion 13. The diameter of the force-applying rotating portion 13 can be larger than the diameter of the thread segment of the screw 12. The slider 11 has a diameter and anti-slip grooves to improve the convenience of force application. A limiting mechanism can be provided on the side of the slider 11 to prevent it from rotating around the screw rod 12. The limiting mechanism can be a limiting rod or a limiting plate. The limiting rod or the limiting plate is parallel to the screw rod 12 and is fixedly arranged in the casing 1. The limiting rod or the limiting plate abuts against the planar outer wall of the slider 11; the limiting mechanism can also be a dovetail groove and a slide rail. Specifically, a slide rail parallel to the screw rod 12 is arranged on the inner wall surface of the casing 1, and a dovetail groove is arranged at the position of the slider 11 corresponding to the slide rail. The dovetail groove is parallel to the screw rod 12 and passes through the slider 11. The slide rail matches the dovetail groove, and the slider 11 slides on the slide rail through the dovetail groove.

[0043] In another embodiment, the pupil distance adjustment mechanism includes a slider 11 and a screw rod 12 , and the specific structure is the same as the above embodiment, except that the screw rod 12 is connected to the rotating motor 14 for transmission to achieve automatic adjustment, and the force-applying rotating part 13 is no longer provided.

[0044] In another embodiment, the pupil distance adjustment mechanism includes at least two telescopic rods 15 and a pushing block 16. The telescopic rod 15 can be an electric telescopic rod. One end of the telescopic rod 15 is connected to the inner wall surface of the housing 1, and the other end is connected to the pushing block 16. The pushing block 16 is fixedly connected to the liquid lens 2. The telescopic direction of the telescopic rod 15 is parallel to the first hole 4 and the second hole 5. The movement of the liquid lens 2 is driven by the telescopic movement of the telescopic rod 15. A dovetail groove and a matching structure of a slide rail can be additionally provided between the pushing block 16 and the inner wall surface of the housing 1, so that the pushing block 16 is slidably set on the inner wall surface of the housing 1.

[0045] In another embodiment, the pupil distance adjustment mechanism includes at least two telescopic rods 15. The difference from the above embodiment is that the telescopic rods 15 directly push the liquid lens 2 to move; the matching structure of the dovetail groove and the slide rail is arranged on the liquid lens 2 and the inner wall of the housing 1.

[0046] On the basis of setting the sunshade 10 , the slider 11 in this embodiment can be connected to the sunshade 10 ; the pushing block 16 in another embodiment can be connected to the sunshade 10 ; and the telescopic rod 15 in another embodiment can directly push the sunshade 10 .

[0047] In order to improve the functionality of the training instrument, an eyepiece disk 25 for switching different lenses is provided on the inner side of the liquid lens 2. 2.5D lenses, red lenses, green lenses and 0D lenses or hollow holes can be provided on the eyepiece disk 25. The 2.5D, red and green lenses and the 0D lenses or hollow holes are evenly distributed around the axis of the eyepiece disk 25. By rotating the eyepiece disk 25, different lenses can be switched to correspond to the liquid lens 2. The 2.5D lens can relax the eyes. When doing the third-level visual function inspection and training, the red and green lenses can be called out for inspection and training. Under normal training, the 0D lens or the hollow hole can be used to correspond to the liquid lens 2.

[0048] The specific setting method of the eyepiece disk 25 in this embodiment is as follows: the eyepiece disk 25 is rotatably set on the shading plate 10 through a rotating shaft, a rack is set on the outer peripheral wall of the eyepiece disk 25, and an eyepiece motor 26 is set on the shading plate 10. The movement of the eyepiece motor 26 can be controlled by a control system. The eyepiece motor 26 drives the eyepiece disk 25 to rotate through the engagement of the gear and the rack to switch different lenses. The eyepiece disk 25 and the eyepiece motor 26 move with the shading plate 10. A avoidance opening is provided on the darkroom tube 9 to avoid the movement of the eyepiece disk 25. The spacing between the avoidance opening and the eyepiece disk 25 should be minimized to ensure the blocking effect on the external ambient light. In other embodiments, a telescopic structure can also be separately set to make the eyepiece disk 25 match the adjustment of the pupil distance. At this time, the eyepiece disk 25 and the eyepiece motor 26 need to be arranged on the telescopic end of the telescopic structure.

[0049] A rubber ring 24 is arranged around the liquid lens 2. When in use, the rubber ring 24 fits against the skin around the eye to provide support and reduce the influence of external light sources, thereby improving the comfort of use.

[0050] A base 19 is provided at the bottom of the casing 1 to strengthen the bottom structural strength of the entire instrument; the base 19 can be replaced by a three-dimensional motion platform, which can provide XYZ three-dimensional motion, and thus the casing 1 can be adjusted front and back, left and right, and up and down.

[0051] A level 20 is provided on the housing 1, and the level 20 is used for leveling when installing the instrument.

[0052] The side wall of the housing 1 is provided with a second display screen 18, which is a touch display screen and is used to display information such as inspection training data, detection results, training suggestions, and precautions. For example, text prompts are displayed on the display screen or voice broadcasts the detected vision problems and corresponding improvement measures, and the user can input personal information, select detection or training items, adjust instrument parameters, etc. through the second display screen 18; of course, the operation of the second display screen 18 can also be achieved through an external mouse.

[0053] Operation buttons and a voice control module can be arranged on the periphery of the second display screen 18 to provide multiple ways to control the instrument. The operation buttons and the voice control module of the second display screen 18 both serve as interaction modules.

[0054] A corresponding depression can be provided at the position of the housing 1 corresponding to the human face to avoid the human face and prevent the human face from making hard contact with the housing 1 when using the device, which affects the use experience.

[0055] The outer end surface of the housing 1 close to the liquid lens 2 is an inclined surface. Specifically, the inclined surface presents an inclined posture where the top is closer to the first display screen 3 than the bottom. In this inclined posture, the user's head presents a downward inclined posture, which can enable the user's eyes to better fit the liquid lens 2. On the basis of setting the rubber ring 24, it can also enable the skin around the user's eyes to better fit the rubber ring 24.

[0056] A nasal groove 17 can be provided at the position of the housing 1 corresponding to the human nose to accommodate the user's nose and avoid hard extrusion of the nose, thereby improving the use comfort.

[0057] A forehead support can be provided at the position of the housing 1 corresponding to the human forehead, and a chin support can be provided at the position corresponding to the human chin to improve the use comfort. The forehead support can be adjusted back and forth, and the chin support can be adjusted up and down. The up and down adjustment utilizes a structure that can generate translational motion, such as a lead screw drive structure or an electric push rod, etc.

[0058] A diopter display 21 can be provided below both the first hole 4 and the second hole 5, so that the person being inspected and trained can more intuitively see the diopter of the left and right eyes. The diopter display 21 and the second display screen 18 are both electrically connected to the data processing module.

[0059] The power supply method of the overall instrument can be: a power supply is arranged in the housing 1 to supply power to each device; or directly powered by an external power supply; an opening and closing button 22 for starting and closing the instrument is provided on the instrument.

[0060] An indicator light 23 is provided on the housing 1 to indicate that the current instrument is in the on state by lighting up.

[0061] The housing 1 is made of engineering plastics and is manufactured through an injection molding process, and has the advantages of being strong and durable, light in weight, and having good insulation performance.

[0062] The edges of the housing 1 may be rounded to prevent sharp edges from causing damage to the user.

[0063] In another embodiment, the visual function test training instrument is additionally provided with an eye tracking module and a data processing and control module. The eye tracking module includes a high-precision eye tracking sensor based on an infrared camera arranged within the visible range of the liquid lens 2, which can capture the infrared reflected light of the user's eyeball, thereby monitoring the eyeball movement in real time. Specifically, it can be arranged above or below the first display 3. When a darkroom tube 9 is set, it needs to be located inside the darkroom tube 9. The eye tracking sensor transmits the collected eye movement data to the data processing and control module. The eye movement analysis algorithm in the data processing and control module processes the received eye movement data to calculate the eyeball movement trajectory, gaze point position, pupil size change, etc. The eye tracking module can accurately judge the user's visual concentration, accuracy and fluency of saccadic movements, and ability to follow movements during visual function tests. In visual training, the display position, movement speed, and direction of the training image are adjusted according to the eye tracking data feedback to implement personalized visual training programs. For example, if the user is found to have frequent eye saccades or deviations when looking at a certain sight mark, the trainer can automatically adjust the display position of the sight mark or add guiding prompts to help the user better complete the training task. In binocular vision function tests, the coordination ability and stereoscopic vision function of the binoculars are evaluated by analyzing the differences and fusion of the binocular gaze points.

[0064] The first display screen 3, the second display screen 18, the light adjustment module, the eye tracking module and the electronic control setting of the liquid lens 2 are all connected to the data processing and control module, which collects, processes and analyzes the data of each module. The data processing and control module is equipped with a high-performance embedded processor and a storage unit, which stores various algorithm programs for visual function detection and training; the storage unit can record and store various data in real time during the detection and training process, such as visual acuity value, refractive power, binocular vision function parameters, eye movement data, etc., so that subsequent doctors or optometrists can conduct detailed analysis and evaluation and track the changing trend of visual function. Adjust the treatment or training plan in time; the data processing and control module can automatically generate personalized visual function examination plans and training plans based on the user's personal information (such as age, gender, vision history, etc.) and test results; for example, for adolescent myopia patients, the data processing and control module can give priority to myopia-related visual function examination items, and formulate a comprehensive training plan including accommodation function training, convergence function training and eye habit guidance based on the examination results; for younger users with myopia tendencies, priority is given to myopia-related risk assessment items, such as accommodation amplitude, accommodation sensitivity and accommodation lag detection.

[0065] In addition, the data processing and control module collects data from each module in real time, analyzes and processes it, and stores the test results in a local storage chip. At the same time, it can transmit the data to a remote server or a doctor's terminal device through a network interface (such as Wi-Fi or Bluetooth) to facilitate remote diagnosis and guidance by the doctor. During the visual training process, the display parameters of the training image, such as the movement speed, direction, and size of the visual mark, are continuously adjusted according to the eye tracking data and the preset training plan to adapt to the user's visual ability and training progress.

[0066] Adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0067] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0068] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A visual function test training instrument, characterized in that: The invention comprises a housing, a liquid lens and a first display screen. The housing is provided with a first hole and a second hole respectively corresponding to the left eye and the right eye of the human body. The first hole and the second hole are both provided with liquid lenses. The housing is provided with the first display screen. The screen of the first display screen is located within the visible range of the liquid lens. The liquid lens is electrically connected to an electric control device for adjusting the supply voltage.

2. The visual function test training instrument according to claim 1, characterized in that: The first display screen is installed inside the housing through a mounting bracket, the mounting bracket is in a square cylinder shape, and heat dissipation holes are provided on the mounting bracket and the housing.

3. The visual function test training instrument according to claim 2, characterized in that: A frustum-shaped darkroom tube is arranged between the liquid lens and the first display screen. One end of the darkroom tube is buckled around the first display screen, and the other end is buckled around the lens of the liquid lens.

4. The visual function test training instrument according to claim 1, characterized in that: The first hole and the second hole are both horizontally arranged waist-shaped holes or strip-shaped holes, the liquid lens is connected to the housing through a pupil distance adjustment mechanism, and the two liquid lenses move towards or away from each other in the first hole and the second hole respectively.

5. The visual function test training instrument according to claim 4, characterized in that: The visual function test training instrument also includes a shading plate for blocking the first hole or the second hole during the movement of the liquid lens. The shading plate is provided at the first hole and the second hole. The shading plate is provided with a through hole matching the liquid lens. The liquid lens is arranged in the through hole, and the shading plate is connected to the pupil distance adjustment mechanism.

6. The visual function test training instrument according to claim 4, characterized in that: The pupil distance adjustment mechanism includes a slider and a screw rod. The two liquid lenses are fixedly connected to the sliders respectively. A threaded hole is provided on the slider. The screw rod is rotatably arranged on the housing. The screw rod includes a first thread segment and a second thread segment with opposite threads. The sliders arranged on the two liquid lenses are threadedly connected to the first thread segment and the second thread segment respectively. One end of the screw rod passes through the housing to form a force-applying rotating portion. A limiting mechanism is arranged on the periphery of the slider to prevent it from rotating around the screw rod.

7. The visual function test training instrument according to claim 1, characterized in that: A light source with adjustable brightness is arranged in the housing, and the light source is arranged toward the first display screen.

8. The visual function test training instrument according to claim 1, characterized in that: The side wall of the housing is provided with a second display screen for displaying inspection training data and operating the instrument.

9. The visual function test training instrument according to claim 1, characterized in that: An eye tracking module for monitoring eye movements is arranged in the housing, and the eye tracking module is electrically connected to the data processing and control module.

10. The visual function test training instrument according to claim 1, characterized in that: An eyepiece disc for switching different lenses is arranged inside the liquid lens.

Images