Visual function inspection device and control method thereof

Abstract

The invention relates to a visual function inspection device and a control method thereof. The visual function inspection device comprises a shell, a mounting plate, an optical machine module, an optical lens assembly, a transmission device, a lens bracket fixing panel and a magnetic lens bracket, at least two fixed lens brackets are arranged on the lens bracket fixing panel and are used for placing fixed lenses; a shading structure is arranged at one end of the mounting plate close to the fixed lens; the light machine module is fixedly connected with the transmission device; the transmission device comprises a first transmission module, a second transmission module and a third transmission module; and the magnetic mirror bracket is adsorbed on the mirror bracket fixing panel and is used for placing an optical lens assembly. The beneficial effects are that the convex lens with + 5 diopters is installed at the front end of the light machine module and is used for simulating an infinite adjustment demand, and the control panel controls the movement distance of the light machine module and matches with different lenses to satisfy visual function inspection of different demands, so that visual function assessment is more comprehensive.

Description

Technical Field

[0001] The present invention relates to the technical field of eye vision examination, and more particularly to a visual function examination device and a control method thereof. Background Art

[0002] Traditional visual function tests mainly rely on professionals to conduct inspections. The accuracy of the inspections mainly depends on the professionalism of the optometrist, and the labor cost of the inspections is relatively high. With the advancement of the times, the advent of intelligence has made it possible to solve the above problems. In order to change the traditional visual function inspection mode, the visual function inspection system of the comprehensive ophthalmometer is used for inspection. However, the ophthalmometer operation is cumbersome, time-consuming and labor-intensive, which restricts the efficiency of the visual function inspection system. At the same time, using trial lenses with a measurement interval of 0.25D to measure the accommodation response and positive and negative relative accommodation makes it difficult to achieve the clearest state of the visual mark, affecting the accuracy of the measurement results. Common visual function inspection items, such as convergence near point, vergence sensitivity, accommodation sensitivity and the measurement of accommodation amplitude by the near method, cannot be carried out by the comprehensive ophthalmometer visual function inspection system. Related handheld inspection equipment is also required, which increases the equipment cost.

[0003] This application is suitable for the precise assessment and personalized rehabilitation treatment of visual dysfunctions such as amblyopia, myopia, and strabismus. It also integrates traditional visual training function tests, such as vision test, color vision assessment, four-hole lamp test, stereoscopic vision test, anisocoria analysis, perceptual crowding assessment, near and far eye position measurement (horizontal / vertical), convergence / divergence ability test, contrast sensitivity test, Amsler scale screening, and accommodation function test (NRA, BCC, PRA, AMP, AC / A) and other full-dimensional visual function assessments. Summary of the Invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes a visual function inspection device and a control method thereof.

[0005] The present invention provides a visual function testing device, comprising a housing, a mounting plate, an optical machine module, an optical lens assembly, a transmission device, a frame fixing panel, and a magnetic frame;

[0006] The frame fixing panel is provided at one end of the housing and is fixedly connected to the housing;

[0007] At least two fixed lens brackets are provided on the fixed panel of the frame for placing fixed lenses; the fixed lens brackets are movably located on one side of the fixed panel of the frame;

[0008] A light shielding structure is provided on one end of the mounting plate close to the fixed lens, and the light shielding structure is located between the optical machine module and the fixed lens bracket;

[0009] The optical engine module is fixedly connected to the transmission device and is respectively arranged on the mounting plate, and the mounting plate is fixedly arranged in the housing;

[0010] The transmission device includes a first transmission module, a second transmission module and a third transmission module; the first transmission module is fixedly connected to the optical machine module; the second transmission modules are movably connected to the fixed lens bracket; the third transmission module is movably connected to the shading structure;

[0011] The magnetic frame is adsorbed on the frame fixing panel, and the magnetic frame is used to place the optical lens assembly.

[0012] Furthermore, the optical lens assembly includes positive spherical lenses, negative spherical lenses, cross-cylindrical lenses, rotating prisms or auxiliary lenses to meet inspections with different requirements;

[0013] The shading structure includes a shading bracket, a left frame and a right frame; the left frame and the right frame are respectively movably arranged on the shading bracket, and a plurality of partitions are provided on the shading bracket. The left frame and the right frame are respectively movably connected to the partitions and move in the horizontal direction to adjust the field of vision of both eyes.

[0014] Furthermore, the optical machine module, the mirror frame fixing panel and the light shielding bracket are respectively provided with a plurality of guide rods;

[0015] The guide rods of the optical machine module are arranged on the left and right sides of the optical machine module;

[0016] The left frame and the right frame are respectively provided with a first connecting block, a limiting block and a first sliding block, the limiting block and the first sliding block are respectively movably provided on different guide rods on the light-shielding bracket, and the first connecting block is fixedly connected to the third transmission module;

[0017] The fixed lens bracket is provided with a second connecting block and a second sliding block respectively. The second connecting block and the second sliding block are respectively provided on different guide rods on the fixed panel of the frame.

[0018] Furthermore, the first transmission module includes a first driver, a driving belt, and a fixed block. One end of the driving belt is connected to the first driver to drive the driving belt to operate. The fixed block is fixedly connected to the optical machine module and the driving belt respectively, so that the driving belt drives the optical machine module to move.

[0019] The second transmission module includes a second driving rod and a second driver, one end of the second connecting block is movably connected to the second driving rod, and the other end is movably connected to the guide rod on the fixing panel of the frame; one end of the second driving rod is connected to the second driver for driving the second driving rod to move;

[0020] The third transmission module includes a third driving rod and a driving block, one end of the driving block is movably connected to the third driving rod, and the other end is fixedly connected to the first connecting block; one end of the third driving rod is connected to the first driver to drive the third driving rod to move;

[0021] The optical machine module includes a frame, a display module and a window surface, wherein the display module is arranged on the frame, and the window surface is vertically arranged on the mounting plate;

[0022] A control panel is provided at one end of the mounting plate, and the control panel is electrically connected to the optical machine module and the transmission device respectively.

[0023] A control method for a visual function testing device is constructed, comprising the following steps:

[0024] Obtain the subject's identity information and pupil distance information through the preset control panel;

[0025] Select test items based on the needs of the examinee;

[0026] NRA tests the ability of the eyes to relax and adjust;

[0027] The lag or advance situation of adjustment through BCC test;

[0028] The PRA tests the ability of the eyes to stimulate accommodation;

[0029] AMP measures the maximum accommodative power that can be used by one or both eyes;

[0030] The change in aggregate volume per unit adjustment change is quantified by AC / A;

[0031] The control panel obtains and records the test results.

[0032] Furthermore, the control panel calculates the relationship between the movement distance of the optical machine module and the adjustment requirement of the eyes according to a preset first formula.

[0033] The first formula is:

[0034]

[0035] Where D is the diopter, and N is the object distance from the optical machine module to the eye;

[0036] The step of testing the eye's ability to relax and adjust using the NRA includes attaching a magnetic frame with a positive spherical lens to a frame fixing panel, resetting the display modules to both sides of the optical mechanism module via the control panel, moving the optical mechanism module from a first position to a third position, and visually determining whether the sight mark is clear.

[0037] If yes, continue to move the optical machine module toward the third position until the sight mark becomes blurred and unrecognizable;

[0038] If not, the number of times the optical machine module moves is recorded and the NRA value is calculated.

[0039] Furthermore, the step of adjusting the lag or advance by BCC test includes:

[0040] The magnetic frame with the cross-cylindrical lenses is attached to the frame fixing panel, and the display module is switched to the 2D single-screen mode through the control panel. The optical engine module is moved to the second position and then to the first position or the third position. The horizontal and vertical lines of the tic-tac-toe sight mark are judged by the eyes to see whether they are equally clear.

[0041] If yes, record the distance moved by the optical machine module and calculate the BCC value;

[0042] If not, the optical machine module moves toward the first position or the third position until the horizontal and vertical lines of the tic-tac-toe sight mark are equally clear.

[0043] Furthermore, the step of testing the eye's ability to stimulate accommodation through PRA includes:

[0044] Adsorbing the magnetic frame with the negative spherical lens onto the frame fixing panel, and resetting the display modules to both sides of the optical machine module;

[0045] Move the optical machine module from the third position to the first position, and visually determine whether the sight mark is clear;

[0046] If yes, continue to move the optical machine module toward the first position until the sight mark becomes blurred and unrecognizable;

[0047] If not, the number of times the optical machine module moves is recorded and the PRA value is calculated.

[0048] Furthermore, the step of measuring the maximum accommodative power of one or both eyes by AMP includes:

[0049] Adsorbing the magnetic frame with the negative spherical lens onto the frame fixing panel, and switching the display module to 2D single-screen mode;

[0050] Move the optical machine module from the third position to the first position, and visually determine whether the sight mark is clear and recognizable;

[0051] If yes, continue to move the optical machine module toward the first position until the sight mark becomes blurred and unrecognizable;

[0052] If not, the distance moved by the optical machine module is recorded and the AMP value is calculated.

[0053] Furthermore, the step of quantifying the change in the aggregate amount caused by each unit adjustment change by AC / A includes:

[0054] Switching the display module to a dual-screen split-view mode, with the dual screens displaying different visual targets, and moving the optical machine module from the third position to the first position;

[0055] When the optical machine module is in the third position, judging by eyes whether the sight marks are aligned;

[0056] If yes, record the value of the rotating prism and repeat at least three times, taking the average value as the final value;

[0057] If not, adjusting the control panel to align the different sight marks;

[0058] When the optical machine module is in the first position, judging by eyes whether the sight mark is aligned;

[0059] If yes, record the value of the rotating prism and repeat at least three times, taking the average value as the final value;

[0060] If not, adjusting the control panel to align the different sight marks;

[0061] The control panel calculates a value of AC / A according to the value of the third position feedback and the value of the first position feedback.

[0062] The beneficial effects of the present invention are: by installing a +5 diopter convex lens at the front end of the optical machine module, it is used to simulate the adjustment requirements of infinity. Among them, when the optical machine module moves to the 200mm position, it is equivalent to "pulling" the optical infinity point to 20cm. The object is just at the focus of the convex lens, and the optical machine module forms parallel light emission, simulating the state of the eyes looking at infinity. The movement range of the optical machine module is 133-200mm, corresponding to the adjustment stimulation of 0D to 2.5D. This range covers the 40cm close inspection requirements commonly used in clinical practice. The transmission device is adjusted through the control panel to reduce the manual ±0.25D lens superposition error, ensuring the repeatability and accuracy of the adjustment test results. The magnetic frame can be adsorbed on the frame fixing panel of the shell. Different lenses can be placed on the magnetic frame for different project tests. It not only retains the flexibility of traditional lens replacement, but also simplifies the tedious process of manual lens replacement. The control panel controls the movement distance of the optical machine module to achieve detection of different items, and different lenses of the optical lens assembly can be matched to meet the visual function inspection needs of different requirements, making the evaluation of visual function more comprehensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 is an exploded view of a visual function testing device according to one embodiment of the present invention;

[0064] Figure 2 is an exploded view of a visual function testing device from another perspective in one embodiment of the present invention;

[0065] Figure 3 This is a three-dimensional diagram of an optical-mechanical module of a visual function testing device according to an embodiment of the present invention;

[0066] Figure 4 This is a perspective view of a transmission device of a visual function testing device in one embodiment of the present invention;

[0067] Figure 5 This is a three-dimensional diagram of a light shielding structure of a visual function testing device according to an embodiment of the present invention;

[0068] Figure 6 is a three-dimensional diagram of a frame fixing panel of a visual function testing device according to one embodiment of the present invention;

[0069] Figure 7 This is a three-dimensional diagram of another perspective of a frame fixing panel of a visual function testing device in one embodiment of the present invention;

[0070] Figure 8 This is a schematic diagram of the assembly of a visual function testing device according to one embodiment of the present invention;

[0071] Figure 9 It is an assembly diagram of another embodiment of a visual function testing device according to one embodiment of the present invention;

[0072] Figure 10 This is a flowchart of the steps of a visual function testing device and a control method thereof in one embodiment of the present invention.

[0073] Description of the label: Shell 1,

[0074] Mounting plate 2, shading structure 21, shading bracket 211, partition 212, left frame 213, right frame 214, first connecting block 215, limiting block 216, first slider 217;

[0075] Frame fixed panel 3, fixed lens bracket 31, second connecting block 311, second slider 312, fixed lens 32;

[0076] Optical machine module 4, frame 41, display module 42, window surface 43;

[0077] Optical lens assembly 5;

[0078] Transmission device 6, first transmission module 61, first driver 611, drive belt 612, fixed block 613; second transmission module 62, second drive rod 621, second driver 622; third transmission module 63, third drive rod 631, drive block 632;

[0079] Magnetic mirror frame 7, guide rod 8, control panel 9. DETAILED DESCRIPTION

[0080] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the following will be a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work shall fall within the scope of protection of the present invention.

[0081] Please refer to the attached Figures 1-9The present invention proposes a visual function inspection device, comprising a housing 1, a mounting plate 2, an optical machine module 4, an optical lens assembly 5, a transmission device 6, a frame fixing panel 3 and a magnetic frame 7; the frame fixing panel 3 is arranged at one end of the housing 1 and is fixedly connected to the housing 1; at least two fixed lens brackets 31 are provided on the frame fixing panel 3 for placing fixed lenses 32; the fixed lens brackets 31 are movably located on one side of the frame fixing panel 3; a shading structure 21 is provided on the end of the mounting plate 2 close to the fixed lens 32, and the shading structure 21 is located at the optical machine module 4 and the fixed lens bracket 31; the optical machine module 4 is fixedly connected to the transmission device 6, and are respectively arranged on the mounting plate 2, and the mounting plate 2 is fixedly arranged in the outer shell 1; the transmission device 6 includes a first transmission module 61, a second transmission module 62 and a third transmission module 63; the first transmission module 61 is fixedly connected to the optical machine module 4; the second transmission module 62 is movably connected to the fixed lens bracket 31; the third transmission module 63 is movably connected to the shading structure 21; the magnetic mirror frame 7 is adsorbed on the mirror frame fixed panel 3, and the magnetic mirror frame 7 is used to place the optical lens assembly 5.

[0082] In this embodiment, the optical mechanism module 4 and the transmission device 6 are respectively mounted on the mounting plate 2, which is fixedly mounted within the housing 1. The frame fixing panel 3 is fixedly mounted at one end of the housing 1 and is provided with a peephole. The magnetic frame 7 is attached to the frame fixing panel 3. The optical lens assembly 5 is specifically mounted on the magnetic frame 7, and the optical lens assembly 5 is positioned correspondingly to the peephole on the frame fixing panel 3. A fixed lens 32 is provided at the front end of the optical mechanism module 4 (i.e., the end near the frame fixing panel 3). The fixed lens 32 is specifically located on the side of the frame fixing panel 3 near the optical mechanism module 4. A fixed lens bracket 31 on the frame fixing panel 3 is used to place the fixed lens 32 and align the fixed lens 32 with the peephole on the frame fixing panel 3. The fixed lens 32 is specifically a 5D convex lens used to simulate the adjustment requirements of infinity. This is equivalent to "pulling" the optical infinity point closer to 20 cm. When the optical module 4 moves to the 200mm position, the object is precisely at the focal point of the convex lens, and the optical module 4 generates parallel light output, simulating the state of the eye looking at infinity. The specific range of movement of the optical module 4 is 133-200mm, corresponding to accommodative stimulation from 0D to 2.5D. This range covers the 40cm close-up examination requirements commonly used in clinical practice. The optical module 4 adjusts the movement distance through the control panel via the adjustment of the transmission device 6, reducing the manual ±0.25D lens superposition error and ensuring the repeatability and accuracy of the adjustment test results. The magnetic frame 7 is equipped with a magnetic element, and the frame fixing panel 3 also has a magnetic element with opposite magnetic properties to the magnetic element on the magnetic frame 7. When the magnetic frame 7 is close to the frame fixing panel 3 of the housing 1, the magnetic frame 7 can be quickly attached to the frame fixing panel 3. This not only retains the flexibility of traditional lens replacement, but also allows for rapid switching between different magnetic frames 7 through the magnetic interface, simplifying the tedious process of manual replacement.

[0083] The relationship between the optical machine movement distance and eye adjustment is: Wherein, D is the diopter, and N is the object distance from the optical machine module 4 to the eye.

[0084] The object distance N is changed by moving the optical module 4. When the optical module 4 moves away from the lens, the object distance N increases, and the accommodative stimulus D decreases. When the optical module 4 moves closer to the lens, the object distance N decreases, and the accommodative stimulus D increases. In traditional visual function examinations, optometrists need to manually change lenses to test different items during NRA / PRA tests. Now, the control panel 9 controls the movement distance of the optical module 4 to achieve different test items, greatly reducing the number of manual operations.

[0085] The shading structure 21 effectively blocks ambient stray light and scattered light from the optical module 4, ensuring that only the image (target sight mark) from the optical module 4 reaches the subject's eyes. When performing NRA, PRA, BCC, AMP, and other regulated tests, the subject must be highly sensitive to changes in blur or clarity. Shading significantly improves image contrast and eliminates background interference, ensuring that the subject's visual axis, the imaging axis of the optical module 4, and the optical center of the lens are aligned.

[0086] In another embodiment, the optical mechanism module 4 is moved to a position corresponding to 40 cm (i.e., an object distance of 133 mm, corresponding to a 2.5D adjustment requirement). Directly moving the optical mechanism module 4 can replace manual lens replacement. When the optical mechanism moves away from the lens, negative accommodation stimulation is increased (equivalent to superimposing a negative lens), and when the optical mechanism moves toward the lens, positive accommodation stimulation is increased (equivalent to superimposing a positive lens).

[0087] Please refer to Figure 1 、 Figure 2 and Figure 8 The optical lens assembly 5 includes a positive spherical lens, a negative spherical lens, a cross cylindrical lens, a rotating prism, and an auxiliary lens. Different lenses of the optical lens assembly 5 can meet different inspection requirements.

[0088] In specific implementation: different lenses of the optical lens assembly 5 can meet different needs of visual function examination, wherein the visual function examination includes but is not limited to vision test, accommodation function test (such as: accommodation flexibility test, accommodation response test, accommodation amplitude test, positive and negative relative accommodation test, AC / A test, etc.), three-level visual function test (homovision test, Worth 4 points, eye position test, positive and negative fusional convergence range test, convergence flexibility test, stereopsis test, etc.), central gaze test, contrast sensitivity test, color vision test, eye movement test, reading ability test. The function of the accommodation system can be comprehensively evaluated from different angles (such as amplitude, flexibility, linkage balance, actual reaction).

[0089] In one embodiment, a magnetic component is provided on the housing 1 of the detection device, and the magnetic component adsorbs a magnetic frame 7 with opposite magnetism to the housing 1 through magnetism. The magnetic frame 7 can be used to place different lenses to meet different visual function tests, and the moving distance of the optical machine module 4 inside the housing 1 is adjusted through the control panel 9 to perform adjustment flexibility check, adjustment response check, adjustment amplitude check, positive and negative relative adjustment check, AC / A check, and then evaluate the function of the adjustment system.

[0090] In another embodiment, a lens turntable is provided within the magnetic frame 7, and the lenses are arranged diagonally relative to the lens turntable, so that the diagonally arranged lenses correspond to the peepholes on the frame fixed panel 3. Specifically, a controller is provided within the magnetic frame 7, and the controller is electrically connected to a control panel 9 within the housing 1. The controller is fixedly connected to the lens turntable, and the control panel 9 can then drive the controller to rotate the lens turntable. That is, the control panel 9 drives the controller to rotate the lens turntable at different angles, so that after rotating the lens turntable by +90° or -90°, a different set of lenses appears, which can correspond to the peepholes on the frame fixed panel 3.

[0091] Please refer to Figure 4 and Figure 5 The shading structure 21 includes a shading bracket 211, a left frame 213 and a right frame 214; the left frame 213 and the right frame 214 are respectively movably arranged on the shading bracket 211, and a plurality of partitions 212 are provided on the shading bracket 211. The left frame 213 and the right frame 214 are respectively movably connected to the partitions 212 and can be moved in the horizontal direction to adjust the field of vision of both eyes.

[0092] In specific implementation, the light-shielding structure 21 includes a light-shielding bracket 211, a left frame 213, and a right frame 214. The light-shielding structure 21 is specifically positioned between the frame fixing panel 3 and the optical-mechanical module 4, and is positioned near the frame fixing panel 3. The left frame 213 and the right frame 214 of the light-shielding structure 21 correspond to the positions of the peephole on the frame fixing panel 3. Specifically, the light-shielding bracket 211 is fixed to the mounting plate 2 and is provided with a plurality of partitions 212. The left frame 213 and the right frame 214 are movably connected to the partitions 212, respectively, to block ambient light or scattered light from the optical-mechanical module 4 from entering the subject's eyes, ensuring that only the image of the sight mark from the optical-mechanical module 4 is captured, thereby improving contrast sensitivity and detection accuracy.

[0093] Please refer to Figure 2 and Figure 4-Figure 6 , a number of guide rods 8 are respectively provided on the optical machine module 4, the frame fixing panel 3 and the shading bracket 211; the guide rods 8 of the optical machine module are arranged on the left and right sides of the optical machine module; the left frame 213 and the right frame 214 are respectively provided with a first connecting block 215, a limit block 216 and a first slider 217, the limit block 216 and the first slider 217 are respectively movably provided on different guide rods 8 on the shading bracket 211, and the first connecting block 215 is fixedly connected to the third transmission module 63; the fixed lens bracket 31 is respectively provided with a second connecting block 311 and a second slider 312, and the second connecting block 311 and the second slider 312 are respectively provided on different guide rods 8 on the frame fixing panel 3.

[0094] During specific implementation: the first transmission module 61 includes a first driver 611, a driving belt 612 and a fixed block 613. The first transmission module 61 is fixedly connected to the optical module 4 through the fixed block 613. Guide rods 8 are respectively provided on the left and right sides of the optical module 4, and the optical module 4 is movably connected to the guide rods 8. When the first transmission module 61 drives the optical module 4 to move, the optical module 4 moves along the preset track of the guide rod 8, so that the optical module 4 moves toward or away from the frame fixed panel 3.

[0095] The frame's fixed panel 3 is equipped with several guide rods 8. The fixed lens holder 31 is equipped with a second connecting block 311 and a second slider 312. The fixed lens holder 31 is connected to the guide rods 8 of the frame's fixed panel 3 via the second connecting block 311 and the second slider 312. Specifically, the second connecting block 311 is located above the fixed lens holder 31, while the second slider 312 is located below the fixed lens holder 31. One end of the second connecting block 311 is movably connected to the corresponding guide rod 8 above the fixed lens holder 31, while the other end is movably connected to the second transmission module 62. The second slider 312 is movably connected to the corresponding guide rod 8 below the fixed lens holder 31. Driven by the second transmission module 62, the fixed lens holder 31 can move left and right, thereby adjusting the distance between the fixed lens holders 31 to accommodate different interpupillary distances (IPDs) of different subjects. The second slider 312 also acts as a limiter, preventing excessive movement of the fixed lens holder 31, which could cause misalignment between the fixed lens holder 31 and the peephole in the frame's fixed panel 3, affecting the subject's field of view.

[0096] The guide rods 8 of the light-shading bracket 211 are respectively arranged on the upper and lower sides of the left frame 213 and the right frame 214. The left frame 213 and the right frame 214 are respectively provided with a first connecting block 215, a limit block 216 and a first slider 217. The limit block 216 and the first slider 217 are respectively movably arranged on different guide rods 8 on the light-shading bracket 211. Specifically, the limit block 216 and the first connecting block 215 are respectively arranged below the left frame 213 and the right frame 214, and the limit block 216 and the first connecting block 215 are respectively movably connected to the corresponding guide rods 8 below the left frame 213 and the right frame 214. The first connecting block 215 is also respectively fixedly connected to the third transmission module 63; the first slider 217 is respectively arranged above the left frame 213 and the right frame 214, and is respectively movably connected to the corresponding guide rods 8 above the left frame 213 and the right frame 214. Driven by the third transmission module 63 , the left frame 213 and the right frame 214 can move left and right respectively to ensure that the visual mark seen by the subject through the left frame 213 and the right frame 214 is an effective and clear picture.

[0097] Please refer to Figure 1 and Figure 4The first transmission module 61 includes a first driver 611, a driving belt 612 and a fixed block 613. One end of the driving belt 612 is connected to the first driver 611 to drive the driving belt 612 to operate. The fixed block 613 is fixedly connected to the optical machine module 4 and the driving belt 612 respectively to enable the driving belt 612 to drive the optical machine module 4 to move.

[0098] In a specific implementation, the first transmission module 61 is fixedly connected to the optical-mechanical module 4. The first transmission module 61 includes a first driver 611, a drive belt 612, and a fixed block 613. A portion of the fixed block 613 of the first transmission module 61 is fixedly connected to the optical-mechanical module 4, while another portion is fixedly connected to the drive belt 612. One end of the drive belt 612 is connected to the first driver 611, enabling the first driver 611 to drive the optical-mechanical module 4 to move via the drive belt 612.

[0099] Please refer to Figure 4 and Figure 6 The second transmission module 62 includes a second driving rod 621 and a second driver 622. One end of the second connecting block 311 is movably connected to the second driving rod 621, and the other end is movably connected to the guide rod 8 on the frame fixing panel 3; one end of the second driving rod 621 is connected to the second driver 622 for driving the second driving rod 621 to move.

[0100] In specific implementation: the second transmission module 62 is arranged on the frame fixing panel 3, the second transmission module 62 includes a second driving rod 621 and a second driver 622, the second driving rod 621 is connected to the second driver 622, the second driving rod 621 is movably connected to the fixed lens bracket 31, when the second driver 622 drives the second driving rod 621 to move, the second driving rod 621 can drive the fixed lens bracket 31 to move left and right in the horizontal direction.

[0101] Please refer to Figure 4 and Figure 5 The third transmission module 63 includes a third driving rod 631 and a driving block 632. One end of the driving block 632 is movably connected to the third driving rod 631, and the other end is fixedly connected to the first connecting block 215. One end of the third driving rod 631 is connected to the first driver 611 to drive the third driving rod 631 to move.

[0102] During specific implementation: the third transmission module 63 is respectively connected to the left frame 213 and the right frame 214 on the light-shading bracket 211, and the third transmission module 63 includes a third driving rod 631 and a driving block 632. The third transmission module 63 is fixedly connected to the left frame 213 and the right frame 214 through the driving block 632, specifically, one end of the driving block 632 is fixedly connected to the first connecting block 215, and the other end is movably connected to the third driving rod 631, one end of the third driving rod 631 is electrically connected to the first driver 611, and the third driving rod 631 is driven to move by the first driver 611 to drive the left frame 213 and the right frame 214 to move left and right. The first driver 611 is electrically connected to the driving belt 612 of the first transmission module 61 and the third driving rod 631 of the third transmission module 63, respectively, so as to realize that when the optical machine module 4 moves toward or away from the frame fixing panel 3, the left frame 213 and the right frame 214 on the shading bracket 211 move left and right, thereby ensuring that when the subject views the sight mark on the window surface 43 through the shading structure 21, the images seen by the left and right eyes are clear and effective.

[0103] Please refer to Figure 1 and Figure 3 The optical machine module 4 includes a frame 41, a display module 42 and a window surface 43. The display module 42 is arranged on the frame 41, and the window surface 43 is arranged vertically to the mounting plate 2.

[0104] In a specific embodiment, the optical module 4 is disposed within the housing 1, specifically on the mounting plate 2 within the housing 1. The optical module 4 includes a frame 41, a display module 42, and a window surface 43. Specifically, the window surface 43 is disposed perpendicular to the mounting plate 2 and located on the side of the frame 41 near the frame fixing panel 3. The display module 42 is disposed on the frame 41 and includes a first display screen and a second display screen. The first display screen is disposed parallel to the mounting plate 2, while the second display screen is disposed perpendicular thereto. The first and second displays are located on different planes of the frame 41. Each of the first and second displays is provided with a drive element, which is electrically connected to a control panel 9 on the mounting plate 2. The control panel 9 drives the drive element to move the first and second displays to the left and right. The distance between the first and second displays can be adjusted synchronously within a range of 40-70 mm to accommodate different subjects' interpupillary distances, covering the interpupillary distance range from children to adults. Adjustment via the control panel 9 reduces errors in manual adjustment.

[0105] Please refer to Figure 1 and Figure 2 A control panel 9 is provided at one end of the mounting plate 2 , and the control panel 9 is electrically connected to the optical machine module 4 and the transmission device 6 respectively.

[0106] In specific implementation: the control panel 9 establishes electrical connections with the optical module 4 and the transmission device 6 respectively, and drives the transmission device 6 to move through the control panel 9, thereby adjusting the movement distance of the optical module 4, and adjusting the spacing between the fixed lens 32 and the shading structure 21 to adapt to the pupil distance of the subject, so as to perform different visual function tests. Among them, the visual function test includes but is not limited to acuity test, accommodation function test (such as: accommodation flexibility test, accommodation response test, accommodation amplitude test, positive and negative relative accommodation test, etc.), AC / A test, three-level visual function test (homovision test, worth 4 points, eye position test, positive and negative fusional convergence range test, convergence flexibility test, stereoscopic vision test, etc.), central gaze test, contrast sensitivity test, color vision test, eye movement test, and reading ability test.

[0107] Please refer to Figure 10 The present invention proposes a control method for a visual function testing device, which includes the following steps:

[0108] S1, obtaining the identity information and pupil distance information of the subject through the preset control panel 9;

[0109] S2, select test items according to the needs of the examinee;

[0110] S3, the ability of eye relaxation adjustment is tested by NRA;

[0111] S4, the lag or advance condition adjusted by the BCC test;

[0112] S5, the ability of eye stimulation and accommodation was tested by PRA;

[0113] S6, the maximum accommodative power that can be used by one or both eyes is measured by AMP;

[0114] S7, quantify the change in aggregate volume per unit adjustment change by AC / A;

[0115] S8, the control panel 9 obtains and records the test results.

[0116] In a specific implementation, a 5D convex lens is fixedly mounted on the front end of the housing 1 (i.e., the end near the frame fixing panel 3) to simulate the eye's need for infinite distance adjustment. The optical module 4 is used in conjunction with the 5D convex lens to simulate an infinite distance, where the eye's adjustment requirement is 0D.

[0117] In one embodiment, the adjustment relationship between the object distance from the optical engine module 4 to the eye and the eye is: D is the diopter, N is the object distance from the optical machine module 4 to the eye, and the unit of object distance is meter. The horizontal movement range of the optical machine module 4 is between 133mm and 200mm. The optical machine module 4 is fixedly connected to the transmission device 6, and the transmission device 6 drives the optical machine module 4 to move between 133mm and 200mm. The optical machine moving distance is the reciprocal compensation of the object distance. The closer the object distance, the larger the reciprocal of the object distance. After subtracting the 5D fixed at the front end of the housing 1 (that is, the end close to the frame fixed panel 3), the amount of adjustment that the eye needs to pay. The closer the object distance, the larger the reciprocal of the object distance, and the greater the amount of adjustment the eye needs to pay; the farther the object distance, the smaller the reciprocal of the object distance, and the smaller the amount of adjustment the eye needs to pay.

[0118] In one embodiment, the optical module 4 is moved to 200 mm (ie 0.2 m), and the adjustment relationship between the optical module movement distance and the eye is: Thus we get At this time, the optical module 4 is used in conjunction with a 5D convex lens (i.e., a fixed lens) to simulate an infinite distance. When the optical module 4 is at 200mm (i.e., 0.2m), the eye's adjustment requirement is 0D.

[0119] The optical module 4 moves to 133mm (0.133m), and the adjustment relationship between the optical machine movement distance and the eyes is adjusted. get The optical module 4 is used in conjunction with the 5D convex lens to simulate a distance of 40 cm. When the optical module 4 is at 133 mm (ie 0.133 m), the eye's adjustment requirement is 2.5D.

[0120] A magnetic frame 7 is provided on the frame fixing panel 3 of the housing 1 to facilitate functional inspections for various requirements. The magnetic frame 7 is attached to the frame fixing panel 3 of the housing 1 via magnetic elements. This facilitates the replacement of different lenses or the magnetic frame 7 when performing various functional inspections, avoiding the tedious lens replacement procedures. The magnetic frame 7 is primarily used to house the optical lens assembly 5, which includes, but is not limited to, positive spherical lenses, negative spherical lenses, cross-cylindrical lenses, rotating prisms, and auxiliary lenses. Different lenses can be used to meet various inspection requirements. Specifically, the magnetic frame 7 is provided with a slot for the movable lens and a placement slot for the fixed lens 32; the slot for the movable lens can be used to place lenses of different refractive powers in the AMP (Amplitude of Accommodation) project test, and the placement slot for the fixed lens 32 can be used to place positive spherical lenses, negative spherical lenses, and cross-cylindrical lenses for testing NRA (Negative Relative Accommodation), PRA (Positive Relative Accommodation), AMP (Amplitude of Accommodation) and BCC (Binocular Cross Cylinder) projects.

[0121] The optical module 4 is fixedly connected to the transmission device 6, and the transmission device 6 is electrically connected to the control panel 9 provided on the mounting plate 2. The object distance is adjusted by moving the optical module 4 through the control panel 9 to replace the traditional manual lens changing. The optometrist can use the control panel 9 to perform different tests according to the needs of the subject, where the test items include but are not limited to testing the eye's ability to relax and adjust through NRA, testing the lag or advance of adjustment through BCC, testing the eye's ability to stimulate adjustment through PRA, measuring the maximum adjustment force that can be used by one or both eyes through AMP, and quantifying the change in the collective amount caused by each unit adjustment change through AC / A. The control panel 9 obtains and records the test results of the items.

[0122] In one embodiment, the step of testing the eye's ability to relax and accommodate using NRA includes attaching a magnetic frame 7 with a positive spherical lens to a frame fixing panel 3, resetting the display module 42 to both sides of the optical mechanism module 4 via a control panel 9, moving the optical mechanism module 4 from a first position to a third position, and visually determining whether the sight mark is clear.

[0123] If yes, the optical module 4 is further moved toward the third position until the sight mark becomes blurred and unrecognizable;

[0124] If not, the number of times the optical-mechanical module 4 moves is recorded and the value of NRA is calculated.

[0125] In the specific implementation: in the step of testing the eye's ability to relax and adjust through NRA (Negative Relative Accommodation), the object distance is adjusted by moving the optical module 4 through the control panel 9 to replace the traditional manual lens replacement, which is far better than the manual ±0.25D lens superposition error, ensuring the repeatability and accuracy of the adjustment test results.

[0126] The optical machine module 4 includes a frame 41, a display module 42, and a viewing window 43. The display module 42 also includes a first display screen and a second display screen. The optical machine module 4 is fixedly connected to a transmission device 6, which is electrically connected to a control panel 9 located on the mounting plate 2. The display module 42 is reset to either side of the frame 41 of the optical machine module 4 via the control panel 9. The distance between the first and second display screens can be adjusted from 40 mm to 70 mm to accommodate different subjects' interpupillary distances. After the display module 42 is reset, the control panel 9 executes a command to increase the spherical lens by +0.25D. Each time the spherical lens is increased, the optical machine module 4 moves once, gradually moving from the first position (i.e., 133 mm) toward the third position (i.e., 200 mm). Simultaneously, the spacing between the sight marks gradually decreases. During this movement, the visual evaluation of the sight marks is performed. The sight marks are selected to be slightly larger than the subject's best visual acuity. For example, if the subject's best visual acuity is 1.0, a 0.8-line sight mark is selected.

[0127] Table 1:

[0128]

[0129] Table 1 shows the data comparison of the movement distance of the optical module 4 and the change in the spacing of the sight marks. As shown in Table 1, when the control panel 9 executes the instruction to increase the +0.25D spherical lens, the optical module 4 moves once, and at the same time, the spacing of the sight marks gradually decreases.

[0130] For example, the subject's pupil distance is 64mm. According to the adjustment relationship between the lens center distance and the pupil distance:

[0131] Pj=(400 / 433)Pd,

[0132] Among them, Pj is the center distance of the lens, and Pd is the pupil distance for telescopic vision.

[0133] For a subject with an interpupillary distance of 64 mm, the lens center distance is 59 mm.

[0134] The distance between the left and right sight marks is adjusted synchronously with the change of the object distance from the optical module 4 to the eye (i.e., the moving distance of the optical module 4). The adjustment relationship between the object distance and the display module 42 is:

[0135] X=(400-N) / 400*Pd,

[0136] Wherein, X is the distance between the sight mark of the first display screen and the sight mark of the second display screen, and N is the object distance from the optical module 4 to the eye.

[0137] For example, the object distance from the optical module 4 to the eye is 148.1 mm, and the distance between the sight mark of the first display screen and the sight mark of the second display screen is 40.30 mm.

[0138] During the movement of the optical module 4, the user visually determines whether the sight mark is clear. If so, the optical module 4 is further moved toward the third position (i.e., the control panel 9 executes the command to increase the spherical lens by +0.25D) until the sight mark is blurred and unrecognizable. If not, the number of times the optical module 4 is moved is recorded, and the NRA value is calculated as the number of optical module movements minus 1*+0.25D. For example, if the optical module is moved four times, the NRA value is +0.75D.

[0139] In one embodiment, the step of adjusting the lag or advance condition through the BCC test includes adsorbing the magnetic frame 7 with the cross-cylindrical lenses onto the frame fixing panel 3, switching the display module 42 to the 2D single-screen mode through the control panel 9, moving the optical engine module 4 to the second position, and moving it toward the first position or the third position, and visually judging whether the horizontal and vertical lines of the tic-tac-toe sight mark are equally clear;

[0140] If yes, the distance moved by the optical-mechanical module 4 is recorded and the value of BCC is calculated;

[0141] If not, the optical module 4 moves toward the first position or the third position until the horizontal and vertical lines of the tic-tac-toe sight mark are equally clear.

[0142] During specific implementation: in the step of adjusting the lag or advance through the BCC test, a magnetic frame 7 with a -0.50 / -1.00*180 lens (i.e., a -1.00D spherical lens superimposed on a ±0.50D cross cylindrical lens, the superposition effect of the two lenses is a composite lens with a combined diopter of -0.50 / -1.00*180) is adsorbed on the frame fixing panel 3. The display module 42 is switched to 2D single-screen mode on the control panel 9, and the optical machine module 4 is moved to the second position (i.e., 15.38cm). The control panel 9 displays the tic-tac-toe sight mark in the center of the screen of the display module 42. The examinee judges with his eyes whether the horizontal and vertical lines of the tic-tac-toe sight mark are equally clear. The optometrist can make a balance adjustment by adding or subtracting the spherical lens through the control panel 9 according to the examinee's feedback; if the horizontal and vertical lines of the tic-tac-toe sight mark observed by the examinee are not equally clear, the optical machine module 4 is moved to the first position (i.e., 133mm). ) or the third position (i.e. 200 mm). Specifically, if the horizontal lines of the tic-tac-toe sight mark observed by the subject are clear, the optical module 4 moves toward the third position (i.e. 200 mm); if the vertical lines are clear, the optical module 4 often moves toward the first position (i.e. 133 mm) until the horizontal and vertical lines of the tic-tac-toe sight mark are as clear. At this time, the neutralization point of the accommodation reaction is reached, and the distance moved by the optical module 4 is recorded (i.e. the position of the optical module 4 when the horizontal and vertical lines of the tic-tac-toe sight mark are as clear).

[0143] Table 2:

[0144]

[0145] Table 2 shows the movement distance of optical module 4 and the corresponding BCC value. As shown in Table 2, when optical module 4 moves to the second position (i.e., 15.38 cm), the actual amount of eye accommodation is exactly equal to the required amount of accommodation, with neither accommodation lag nor accommodation advance, indicating an ideal normal accommodation state. Moving optical module 4 from the second position (i.e., 15.38 cm) toward the first position (i.e., 13.33 cm) is equivalent to adding a negative spherical lens, while moving toward the first position (i.e., 20 cm) is equivalent to adding a positive spherical lens. The greater the distance optical module 4 moves, the smaller the amount of accommodation the eye needs to make; the smaller the distance optical module 4 moves, the greater the amount of accommodation the eye needs to make.

[0146] For example, when the optical module 4 moves to 18.18 cm, the horizontal and vertical lines of the tic-tac-toe sight mark are equally clear, and the BCC value is +1.00D.

[0147] In one embodiment, the step of testing the ability of eye accommodation through PRA includes adsorbing the magnetic frame 7 with the negative spherical lens onto the frame fixing panel 3, resetting the display module 42 to both sides of the optical module 4, moving the optical module 4 from the third position to the first position, and visually determining whether the sight mark is clear;

[0148] If yes, the optical module 4 is further moved toward the first position until the sight mark becomes blurred and unrecognizable;

[0149] If not, the number of times the optical-mechanical module 4 moves is recorded, and the value of PRA is calculated.

[0150] In specific implementation, the magnetic frame 7 with the -2.5D spherical lens is adsorbed onto the frame fixing panel 3, and the display module 42 is reset to both sides of the frame 41 of the optical module 4 through the control panel 9. The adjustable range of the distance between the first display screen and the second display screen is 40mm-70mm to adapt to the pupil distance of different subjects. After the display module 42 is reset, the control panel 9 is used to execute the instruction to increase the -0.25D spherical lens. Each time the distance is increased, the optical module 4 moves once, so that the optical module 4 gradually moves from the third position (i.e., 200mm) toward the first position (i.e., 133mm). At the same time, the spacing of the sight marks gradually increases. During the movement, the eyes can judge whether the sight marks are clear. For example, if the PD of the subject is 64mm, the size of the sight mark is slightly larger than the subject's best visual acuity. If the best visual acuity is 1.0, a sight mark with 0.8 lines is selected.

[0151] Table 3:

[0152]

[0153]

[0154] Table 3 compares the movement distance of the optical module 4 and the change in the spacing between the sight marks. As shown in Table 3, when the control panel 9 executes the command to add a -0.25D spherical lens, the optical module 4 moves once, from the third position (i.e., 20 cm) to the first position (i.e., 13.33 cm), which is equivalent to adding a negative spherical lens. As the optical module 4 moves, the spacing between the sight marks gradually increases.

[0155] In one embodiment, the step of measuring the maximum accommodative force of one or both eyes using the AMP includes attaching the magnetic frame 7 with the negative spherical lens to the frame fixing panel 3, switching the display module 42 to a 2D single-screen mode, moving the optical machine module 4 from the third position to the first position, and visually determining whether the sight mark is clear and recognizable;

[0156] If yes, the optical module 4 is further moved toward the first position until the sight mark becomes blurred and unrecognizable;

[0157] If not, the distance moved by the optical-mechanical module 4 is recorded and the value of AMP is calculated.

[0158] In specific implementation, the magnetic frame 7 with the -2.5 spherical lens is attached to the frame fixed panel 3. The distance between the fixed lens bracket 31 and the display module 42 is adjusted via the control panel 9 to match the subject's pupil distance. The adjustment relationship between the lens center distance and the pupil distance is Pj = (400 / 433) Pd, and the lens center distance is adjusted. For example, if the subject's pupil distance is 64mm, the lens center distance = 59mm. The display module 42 is switched to 2D single-screen mode on the control panel 9, and the optical module 4 is moved to the third position (i.e., 20.00cm), with the minimum sight mark displayed in the center of the screen. The subject observes the sight mark to see if it is clear and can identify the direction. If the subject reports that the sight mark is clear and can identify the direction, the optical module 4 moves a certain distance in the direction of the first position. If the subject reports that the sight mark is unclear and cannot identify the direction, the distance moved by the optical module 4 is recorded and the AMP value is calculated.

[0159] Table 4:

[0160]

[0161]

[0162] Table 4 shows the movement distances and corresponding AMP values ​​for optical module 4. As shown in Table 4, attaching a magnetic frame 7 with a -2.5D spherical lens to the frame fixing panel 3 and moving the optical module 4 from the third position (i.e., 20 cm) toward the first position (i.e., 13.33 cm) is equivalent to gradually adding a negative spherical lens in -0.25D steps.

[0163] The AMP value is equal to the combined luminosity of -10.00D. For example, when the optical module 4 moves to 16.00cm, the subject reports that the sight mark is unclear and the direction cannot be identified, and the minus spherical lens is stopped. At this time, the AMP value is equal to 11.25D.

[0164] In another embodiment, a magnetic frame 7 is attached to the frame fixing panel 3. The magnetic frame 7 is provided with a slot for a movable lens and a slot for a fixed lens 32. The slot for the movable lens can be used to accommodate lenses of different diopters, including but not limited to spherical lenses of -5.00D, -7.50D, and -10.00D. The optometrist can switch lenses based on the patient's feedback. For example, if the patient reports that the sight mark is clear, the optometrist can switch to a higher-power lens based on the patient's feedback until the sight mark becomes blurred but becomes clear again after approximately 3 seconds of observation.

[0165] In one embodiment, the step of quantifying the change in the collective amount caused by each unit adjustment change by AC / A includes switching the display module 42 to a dual-screen split-viewing mode, with the dual screens displaying different visual targets, and moving the optical machine module 4 from the third position to the first position;

[0166] When the optical machine module 4 is in the third position, the sight mark is judged by the eyes whether it is aligned;

[0167] If yes, record the value of the rotating prism and repeat at least three times, taking the average value as the final value;

[0168] If not, adjust the different sight marks to align through the control panel 9;

[0169] When the optical machine module 4 is in the first position, the sight mark is judged by the eyes whether it is aligned;

[0170] If you record the value of the rotating prism, repeat it at least three times and take the average value as the final value;

[0171] If not, adjust the control panel 9 to align the different sight marks;

[0172] The control panel 9 calculates the value of AC / A according to the value of the third position feedback and the value of the first position feedback.

[0173] In practice, the AC / A ratio (Accommodative Convergence / Accommodation ratio) refers to the change in prismatic convergence associated with one diopter (D) of eye accommodation, typically expressed in prismatic power (Δ). The AC / A ratio reflects the linkage between accommodation and convergence and is an important parameter for evaluating and diagnosing strabismus, accommodation and convergence disorders, and for developing eyeglass prescriptions or treatment plans. Specifically, distance phoria is measured at 6 meters using the von Graefe method or a Maddox rod, and the results are recorded. Exophoria is negative, and esophoria is positive. When measuring distance heterophoria (ΔD), the display module 42 is set to a dual-screen split-view mode, and different sight marks are displayed on the dual screens. Specifically, the left screen is set to an arrow sight mark, and the right screen is set to a triangle sight mark. The optical module 4 is moved to the third position (i.e., 20 cm). At this time, the optical module 4 is used in conjunction with the 5D convex lens to simulate an infinite distance. The subject observes the sight mark of the display module 42 at one end of the frame fixing panel 3. At this time, the subject's left eye can see the arrow sight mark on the left screen, and the right eye can see the triangle sight mark on the right screen. The arrow sight mark and the triangle sight mark are adjusted according to the subject's feedback so that the arrow sight mark and the triangle sight mark are aligned, and the data at this time is recorded as ΔD. The control panel 9 is used to set the optical module 4 to a 40cm working distance, so that the accommodative stimulus is 2.5D. The subject is asked to observe the sight mark of the display module 42 at one end of the frame fixing panel 3. The arrow sight mark and the triangle sight mark are adjusted according to the subject's feedback so that the arrow sight mark and the triangle sight mark are aligned. The data at this time is recorded and recorded as ΔN. For example, PD = 6cm, ΔD = -2Δ (exophoria), ΔN = +6Δ (esophoria), through Calculate the formula and get:

[0174]

[0175] Repeated measurements of distance heterophoria (ΔD) and near heterophoria (ΔN) can reduce accidental errors and improve data stability and accuracy by taking the average of multiple measurements.

[0176] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, apparatus, article, or method comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, apparatus, article, or method. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, apparatus, article, or method comprising the element.

[0177] In the description of the embodiments of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0178] Furthermore, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0179] The above description is only a preferred embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A visual function testing device, characterized in that: It includes a housing, a mounting plate, an optical machine module, an optical lens assembly, a transmission device, a frame fixing panel and a magnetic frame; The frame fixing panel is provided at one end of the housing and is fixedly connected to the housing; At least two fixed lens brackets are provided on the fixed panel of the frame for placing fixed lenses; the fixed lens brackets are movably located on one side of the fixed panel of the frame; A light shielding structure is provided on one end of the mounting plate close to the fixed lens, and the light shielding structure is located between the optical machine module and the fixed lens bracket; The optical engine module is fixedly connected to the transmission device and is respectively arranged on the mounting plate, and the mounting plate is fixedly arranged in the housing; The transmission device includes a first transmission module, a second transmission module and a third transmission module; the first transmission module is fixedly connected to the optical machine module; the second transmission modules are movably connected to the fixed lens bracket; the third transmission module is movably connected to the shading structure; The magnetic frame is adsorbed on the frame fixing panel, and the magnetic frame is used to place the optical lens assembly.

2. The visual function testing device according to claim 1, characterized in that: The optical lens assembly includes positive spherical lenses, negative spherical lenses, cross-cylindrical lenses, rotating prisms or auxiliary lenses, which are used to meet inspections with different requirements; The shading structure includes a shading bracket, a left frame and a right frame; the left frame and the right frame are respectively movably arranged on the shading bracket, and a plurality of partitions are provided on the shading bracket. The left frame and the right frame are respectively movably connected to the partitions and move in the horizontal direction to adjust the field of vision of both eyes.

3. The visual function testing device according to claim 2, characterized in that: The optical machine module, the mirror frame fixing panel and the light shielding bracket are respectively provided with a plurality of guide rods; The guide rods of the optical machine module are arranged on the left and right sides of the optical machine module; The left frame and the right frame are respectively provided with a first connecting block, a limiting block and a first sliding block, the limiting block and the first sliding block are respectively movably provided on different guide rods on the light-shielding bracket, and the first connecting block is fixedly connected to the third transmission module; The fixed lens bracket is provided with a second connecting block and a second sliding block respectively. The second connecting block and the second sliding block are respectively provided on different guide rods on the fixed panel of the frame.

4. The visual function testing device according to claim 3, characterized in that: The first transmission module includes a first driver, a driving belt, and a fixed block. One end of the driving belt is connected to the first driver to drive the driving belt to operate. The fixed block is fixedly connected to the optical machine module and the driving belt respectively, so that the driving belt drives the optical machine module to move. The second transmission module includes a second driving rod and a second driver, one end of the second connecting block is movably connected to the second driving rod, and the other end is movably connected to the guide rod on the fixing panel of the frame; one end of the second driving rod is connected to the second driver for driving the second driving rod to move; The third transmission module includes a third driving rod and a driving block, one end of the driving block is movably connected to the third driving rod, and the other end is fixedly connected to the first connecting block; one end of the third driving rod is connected to the first driver to drive the third driving rod to move; The optical machine module includes a frame, a display module and a window surface, wherein the display module is arranged on the frame, and the window surface is vertically arranged on the mounting plate; A control panel is provided at one end of the mounting plate, and the control panel is electrically connected to the optical machine module and the transmission device respectively.

5. A control method for a visual function testing device according to any one of claims 1 to 4, characterized in that: The following steps are involved: Obtain the subject's identity information and pupil distance information through the preset control panel; Select test items based on the needs of the examinee; NRA tests the ability of the eyes to relax and adjust; The lag or advance situation of adjustment through BCC test; The PRA tests the ability of the eyes to stimulate accommodation; AMP measures the maximum accommodative power that can be used by one or both eyes; The change in aggregate volume per unit adjustment change is quantified by AC / A; The control panel obtains and records the test results.

6. The control method of the visual function testing device according to claim 5, characterized in that: The control panel calculates the relationship between the movement distance of the optical machine module and the adjustment requirement of the eyes according to a preset first formula, The first formula is: Where D is the diopter, and N is the object distance from the optical machine module to the eye; The step of testing the eye's ability to relax and adjust using the NRA includes attaching a magnetic frame with a positive spherical lens to a frame fixing panel, resetting the display modules to both sides of the optical mechanism module via the control panel, moving the optical mechanism module from a first position to a third position, and visually determining whether the sight mark is clear. If yes, continue to move the optical machine module toward the third position until the sight mark becomes blurred and unrecognizable; If not, the number of times the optical machine module moves is recorded and the NRA value is calculated.

7. The control method of the visual function testing device according to claim 5, characterized in that: The steps of adjusting the lag or advance situation by BCC test include: The magnetic frame with the cross-cylindrical lenses is attached to the frame fixing panel, and the display module is switched to the 2D single-screen mode through the control panel. The optical engine module is moved to the second position and then to the first position or the third position. The horizontal and vertical lines of the tic-tac-toe sight mark are judged by the eyes to see whether they are equally clear. If yes, record the distance moved by the optical machine module and calculate the BCC value; If not, the optical machine module moves toward the first position or the third position until the horizontal and vertical lines of the tic-tac-toe sight mark are equally clear.

8. The control method of the visual function testing device according to claim 5, characterized in that: The step of testing the ability of eye stimulation and accommodation through PRA includes: Adsorbing the magnetic frame with the negative spherical lens onto the frame fixing panel, and resetting the display modules to both sides of the optical machine module; Move the optical machine module from the third position to the first position, and visually determine whether the sight mark is clear; If yes, continue to move the optical machine module toward the first position until the sight mark becomes blurred and unrecognizable; If not, the number of times the optical machine module moves is recorded and the PRA value is calculated.

9. The control method of the visual function testing device according to claim 5, characterized in that: The step of measuring the maximum accommodative power of one or both eyes by AMP includes: Adsorbing the magnetic frame with the negative spherical lens onto the frame fixing panel, and switching the display module to 2D single-screen mode; Move the optical machine module from the third position to the first position, and visually determine whether the sight mark is clear and recognizable; If yes, continue to move the optical machine module toward the first position until the sight mark becomes blurred and unrecognizable; If not, the distance moved by the optical machine module is recorded and the AMP value is calculated.

10. The control method of the visual function testing device according to claim 5, characterized in that: The step of quantifying the change in the aggregate amount caused by each unit adjustment change by AC / A includes: Switching the display module to a dual-screen split-view mode, with the dual screens displaying different visual targets, and moving the optical machine module from the third position to the first position; When the optical machine module is in the third position, judging by eyes whether the sight marks are aligned; If yes, record the value of the rotating prism and repeat at least three times, taking the average value as the final value; If not, adjusting the control panel to align the different sight marks; When the optical machine module is in the first position, judging by eyes whether the sight mark is aligned; If yes, record the value of the rotating prism and repeat at least three times, taking the average value as the final value; If not, adjusting the control panel to align the different sight marks; The control panel calculates a value of AC / A according to the value of the third position feedback and the value of the first position feedback.

Images