Visual training device

Abstract

The invention belongs to the technical field of medical instruments and discloses a visual training device which comprises a support, a liquid lens and a controller, and the liquid lens and the controller are arranged on the support. The controller is connected with the liquid lens and is set to control the liquid lens to be converted between the first diopter and the second diopter. According to the invention, the liquid lens is used for replacing a traditional reverse-rotation double-lens structure, the structure is simple, and mechanical movement abrasion and mechanical faults are reduced. The controller controls the liquid lens to be switched between the first diopter and the second diopter, and visual training can be achieved. By controlling the diopter conversion speed of the liquid lens, different modes such as smooth diopter conversion or instant diopter conversion can be realized, and the adaptability of a user to diopter conversion or the visual training effect is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and more specifically, the present invention relates to a vision training device. Background Art

[0002] Myopia refers to blurred vision caused by parallel light rays focusing in front of the retina after passing through the eye's refractive system. Myopia is manifested as the inability of parallel light to form an image on the retina when entering the eye, and the eye structure is manifested as the axial length of the eye exceeding the normal range or the curvature of the cornea and lens being too large. The main theories for the occurrence and development of myopia include the accommodation lag theory and the peripheral defocus theory. The accommodation lag theory holds that after long-term near vision, accommodation lag causes the eye to be unable to focus accurately, and the focus of the object falls behind the retina to form hyperopic defocus, thus triggering the occurrence of myopia. The peripheral defocus theory holds that peripheral retinal hyperopic defocus may be an important factor in myopia progression.

[0003] The flipper is a common vision function training tool for relieving and treating myopia, mainly for training accommodation sensitivity. Through continuous adjustment of the focal length of the eyeball during eye flipper training, it can stimulate the muscles around the eyeball and the nerves around the retina, improve the flexibility and accommodation ability of the eyeball, and has good training efficacy. Moreover, it has good therapeutic effects on accommodative myopia, accommodation spasm caused by long-term near vision of the eyes, and pseudo-myopia.

[0004] The flipper usually includes a myopic lens and a hyperopic lens. The myopic lens can tighten the ciliary muscle, and the hyperopic lens can relax the ciliary muscle. By flipping one of the lenses back and forth to switch the diopter of the lens group in front of the user's eyes, it can be used for checking accommodation sensitivity and also for accommodation training. The manual flipping method of the flipper lens has problems such as inconvenient operation, poor compliance, inaccurate accommodation sensitivity threshold, and difficulty in axis alignment.

[0005] Chinese Patent ZL201420297504.X discloses an electric flipping mirror, which mainly includes an integrated main mirror frame and handle, a secondary mirror frame and a motor. The secondary mirror frame is driven by the motor to flip in a direction perpendicular to the user's face. When the hyperopic lens flips to overlap with the myopic lens, the myopic lens and the hyperopic lens are coaxial front and back along the user's line of sight, and the two overlap and act. When the hyperopic lens flips to be perpendicular to the user's face, the myopic lens acts alone.

[0006] Chinese Patent ZL202420930770.5 discloses an eyepiece disc assembly, including an eyepiece disc bracket, an eyepiece disc, and a motor. The middle part of the eyepiece disc is rotatably connected to the eyepiece disc bracket. The motor drives the eyepiece disc bracket to rotate in a direction parallel to the user's face, and the motor rotates the eyepiece disc, with a uniform lens switching speed. Hyperopia lenses and myopia lenses are arranged along the circumference of the eyepiece disc. When switching a hyperopia lens or a myopia lens into the user's line of sight, the hyperopia lens or the myopia lens acts independently.

[0007] In the prior art, for the two lenses or multiple lenses provided in the flipper, whether flipping in a direction perpendicular to the user's face or rotating in a direction parallel to the user's face for lens switching, the flipping speed depends on mechanical structures such as gears or motors, resulting in problems such as complex structures, easy wear or breakdown of the transmission structure, and unsmooth adjustment of diopter.

[0008] In view of this, there is an urgent need to provide a vision training device to solve the problems of complex structure and unsmooth zooming of the flipper. Summary of the Invention

[0009] To solve at least one or more of the above-mentioned technical problems, the present invention provides a vision training device, including: a bracket and a liquid lens provided on the bracket; a controller; the controller is connected to the liquid lens and is configured to control the liquid lens to switch between a first diopter and a second diopter.

[0010] According to an embodiment of the present invention, the liquid lens includes any one of a liquid crystal type, an electro-wetting type, and a liquid-filled type.

[0011] According to an embodiment of the present invention, the difference between the first diopter and the second diopter is 1 to 8.

[0012] According to an embodiment of the present invention, the first diopter and the second diopter are respectively fixed values, or the first diopter and the second diopter are respectively variable values.

[0013] According to an embodiment of the present invention, the diopter of the liquid lens is switched in a uniform stepped manner, and the difference between each step is between 0.5D and 1D; or, the diopter of the liquid lens is switched in a non-uniform stepped manner, and the difference between each step is between 0D and 1D.

[0014] According to an embodiment of the present invention, the controller includes a timing module, and the timing module is used to control the activation duration of the liquid lens.

[0015] According to an embodiment of the present invention, the controller further includes a constant speed module, and the constant speed module is used to control the switching speed of the liquid lens between the first diopter and the second diopter.

[0016] According to an embodiment of the present invention, the controller further includes a display module, and the display module is configured to display the state parameters of the liquid lens.

[0017] According to an embodiment of the present invention, the controller further includes a voice module, and the voice module is configured to broadcast the state parameters of the liquid lens.

[0018] According to an embodiment of the present invention, the controller further includes a human-machine interface, and the human-machine interface is used for a user to input control instructions for the liquid lens.

[0019] According to an embodiment of the present invention, the controller further includes a storage module,

[0020] The storage module is configured to store at least one set of operation instructions for controlling the liquid lens.

[0021] According to an embodiment of the present invention, when the liquid lens is of the liquid crystal type or the electro-wetting type, the electrodes of the liquid lens are metal thin film transparent electrodes.

[0022] In the present invention, the liquid lens is used to replace the double-lens structure of the traditional flipper. The structure is simple, reducing mechanical movement wear and mechanical failures. By controlling the liquid lens to switch between a first diopter and a second diopter by the controller, visual training can be achieved. By controlling the diopter conversion speed of the liquid lens, different methods such as smooth diopter conversion or instant conversion can be realized, improving the user's adaptability to diopter conversion or improving the visual training effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] By referring to the drawings and reading the detailed description below, the above and other objects, features, and advantages of the exemplary embodiments of the present invention will become readily understood. In the drawings, several embodiments of the present invention are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0024] Figure 1 A schematic diagram of visual training is shown;

[0025] Figure 2 A schematic diagram of light convergence when the training lens is a convex lens is shown;

[0026] Figure 3 A schematic diagram of light divergence when the training lens is a concave lens is shown;

[0027] Figure 4 A schematic diagram of the visual training device is shown;

[0028] Figure 5 A schematic diagram of the controller is shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] It should be understood that the terms "including" and "comprising" used in the specification and claims of the present invention indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0031] It should also be understood that the terms used in the specification of the present invention are merely for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification and claims of the present invention, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to include the plural forms. It should be further understood that the term "and / or" used in the specification and claims of the present invention refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0032] As used in this specification and the claims, the term "if" can be interpreted as "when", "once", "in response to determining", or "in response to detecting" according to the context. Similarly, the phrase "if determined" or "if [the described condition or event] is detected" can be interpreted as meaning "once determined", "in response to determining", "once [the described condition or event] is detected", or "in response to detecting [the described condition or event]" according to the context.

[0033] The following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings.

[0034] Figure 1 A schematic diagram of visual training is shown.

[0035] Figure 2 A schematic diagram of light convergence when the training lens is a convex lens is shown.

[0036] Figure 3 A schematic diagram of light divergence when the training lens is a concave lens is shown.

[0037] As Figure 1 shown, visual training is to take various measures to exercise the function of the ciliary muscle according to the specific glasses condition of the user, increase the accommodation reserve, so as to improve the vision of myopia, effectively control the deepening of myopia degree, and improve the visual function.

[0038] More common training methods include: placing a vision chart 1 at a position 40 cm away from the user's eyes, preparing training lenses 2 with ±2.00 D, switching the training lenses 2 to one of the degrees, requiring the user to clearly see the content in the vision chart 1 through the training lenses 2, then switching the training lenses 2 to the other degree, and again requiring the user to clearly see the content in the vision chart 1. Then cycle through the degrees of the training lenses 2 at a switching speed that keeps the user's reading content clear. The training method can be set as: monocular training 1 - 2 times / d, 10 - 15 min / d, ensuring that the user completes 20 cycles of flipping per minute and the binocular difference is less than 2 cycles.

[0039] As Figure 2 shown, when the degree of the training lens 2 is switched to the convex lens 21, the converging effect of the light makes the image located in front of the retina compared to when there is no training lens. The ciliary muscle of the user's eye will contract, driving the deformation of the lens to move the image from in front of the retina to the retina.

[0040] As Figure 3 shown, when the degree of the training lens 2 is switched to the concave lens 22, the diverging effect of the light makes the image located behind the retina compared to when there is no training lens. The ciliary muscle of the user's eye will relax, driving the deformation of the lens to move the image from behind the retina to the retina.

[0041] By switching the degree of the training lens 2, the imaging distance is switched. In order to see the object clearly, the ciliary muscle switches between relaxation and contraction, driving the deformation of the lens. In this process, the ciliary muscle is trained, and the blood supply to the ciliary muscle of the eyeball increases. The movement speed and muscle strength of the eye ciliary muscle are effectively improved, the focusing performance is improved, the accommodation function, accommodation amplitude, and flexibility are increased, the accommodation lag amount is reduced, and the growth of the eye axis length is delayed.

[0042] Figure 4 shows a schematic diagram of a visual training device.

[0043] Figure 5 shows a schematic diagram of a controller.

[0044] As Figure 4 shown, the visual training device 3 includes a bracket 31 and a liquid lens 32 and a controller 33 arranged on the bracket 31. The controller 33 is connected to the liquid lens 32 and is set to control the liquid lens 32 to switch between a first diopter and a second diopter.

[0045] The bracket 31 is used to support the liquid lens 32 for the user to wear. The bracket 31 can be selected as a head-mounted structure or a desktop structure that can be placed on a table.

[0046] A liquid lens is an optical device made of one or more liquids. It can change the surface curvature radius or the refractive index of the filling liquid through external control, so as to change the diopter, and has a zooming ability that traditional optical lenses cannot match. It has the advantages of high adjustment accuracy, small volume, fast response speed, etc.

[0047] Liquid lenses can have either a single - liquid structure or a double - liquid structure. Most double - liquid lenses are designed based on the principle of electrowetting - on - dielectric. Single - liquid lenses mostly achieve the zoom function by sucking and pumping the liquid in the chamber through a syringe. By controlling the liquid lens to form different shapes, the liquid lens can converge light like a convex lens in a certain state and diverge light like a concave lens in another state. Liquid lenses include any one of liquid - crystal type, electrowetting type, and liquid - filled type. For example, liquid - crystal type and electrowetting type liquid lenses can adjust their diopter or optical power by changing the applied voltage. When using liquid - crystal type and electrowetting type liquid lenses, their electrodes use metal - film transparent electrodes.

[0048] A controller refers to a device that controls the liquid lens. It can be set as a manual control knob to determine the diopter of the liquid lens according to the user's manual input. For example, the manual control knob has multiple gears. When the manual control knob is rotated to the first gear, the voltage or liquid filling amount of the liquid lens is controlled to make the liquid lens in the first diopter. When the manual control knob is rotated to the second gear, the voltage or liquid filling amount of the liquid lens is controlled to make the liquid lens in the second diopter.

[0049] According to an embodiment of the present invention, the selected diopter range of the liquid lens is the first diopter and the second diopter, and the user only determines two working states of the liquid lens through the controller. That is, the first working state is: the diopter is the first diopter. The second working state is: the diopter is the second diopter.

[0050] The present invention is applicable to visual training scenarios where the main means is to switch the corrective diopter in front of the user's eyes, especially applicable to eye accommodation sensitivity training scenarios.

[0051] In the present invention, the diopter of the liquid lens is controlled through the controller. The numerical change of the diopter of the liquid lens can be in a fixed mode, where the first diopter and the second diopter are fixed values, such as ±2D; or it can adopt a non - fixed mode, where the first diopter and the second diopter are variable values, such as switching within the convex - lens range or the concave - lens range to cause different deformations of the lens, so as to achieve the purpose of training the ciliary muscle, such as + 2D to + 1D, or - 2D to - 1D.

[0052] Preferably, the diopter of the liquid lens is switched in a uniform stepped manner, and the difference between each step, that is, the change gradient, is between 0.5D and 1D.

[0053] Preferably, the diopter of the liquid lens is switched in a non-uniform stepped manner, and the difference between the steps, i.e., the change gradient, is between 0D and 1D.

[0054] Preferably, the diopter of the liquid lens is switched in a non-uniform stepped manner, and the difference between the steps, i.e., the change gradient, is between 0D and 1D. The change gradients of the first diopter and the second diopter are the same or different.

[0055] The control of the diopter in the non-fixed mode of the liquid lens in the present invention can reduce the tolerance of the user's eyes.

[0056] According to another embodiment of the present invention, the diopter range of the liquid lens covers the first diopter and the second diopter. The controller is a microprocessor, and one or more control modes are built in or input by the user in the microprocessor. The microprocessor outputs control signals to the liquid lens according to different control modes to control the switching of the diopter of the liquid lens. For example, when the liquid lens is of the liquid crystal type or the electro-wetting type, the control signal output by the microprocessor is a voltage, and the voltage under the corresponding control mode is output to the electrodes of the liquid lens, thereby controlling the switching of the diopter of the liquid lens. For another example, when the liquid lens is of the liquid filling type, the control signal output by the microprocessor is a deformation amount, and the liquid infusion pump controls the switching of the diopter of the liquid lens according to the deformation amount.

[0057] Among them, the control modes in the microprocessor are different control instructions or programs, and there can be multiple types to meet different visual training requirements.

[0058] According to an embodiment of the present invention, the difference between the first diopter and the second diopter is 1 to 8. For example, according to the visual training requirements, the diopter can be set within the range of ±2.50D to ±3.50D.

[0059] As Figure 5 shown, the controller 33 includes a timing module 331, and the timing module 331 is used to control the activation duration of the liquid lens. The activation duration refers to the working duration of the liquid lens. The training duration can be set in the timing module 331 built in the controller 33 according to the visual training requirements, so as to automatically end the visual training and make the liquid lens return to the initial state.

[0060] The timing module 331 can use an existing mechanical timer or a timing program built in a microcontroller.

[0061] According to an embodiment of the present invention, the controller 33 further includes a speed control module 332, and the speed control module 332 is used to control the conversion speed of the liquid lens between the first diopter and the second diopter.

[0062] When the controller uses a microprocessor, the fixed-speed module 332 can be an encoder, which can control the change rate of voltage or deformation amount. When the speed control is small, it provides a smooth diopter change for the user, improving the user's adaptability. When the speed control is large, it can provide an instant diopter switch for the user.

[0063] According to an embodiment of the present invention, the controller 33 further includes a display module 334, and the display module 334 is used to display the state parameters of the liquid lens. The display module 334 can be set as a display screen, receive a display drive signal, and display the state parameters of the liquid lens. Among them, the state parameters include at least one of the following: diopter, speed, duration.

[0064] According to an embodiment of the present invention, the controller further includes a voice module 335, and the voice module 335 is used to broadcast the state parameters of the liquid lens. The voice module 335 receives a voice broadcast drive signal and broadcasts the state parameters of the liquid lens. Among them, the state parameters include at least one of the following: diopter, speed, duration.

[0065] According to an embodiment of the present invention, the controller further includes a human-machine interface 333, and the human-machine interface 333 is used for the user to input control instructions for the liquid lens. The human-machine interface is, for example, a USB interface, a wireless interface, etc.

[0066] According to an embodiment of the present invention, the controller further includes a storage module 336, and the storage module 336 is used to store at least one set of operation instructions for controlling the liquid lens. When the controller is a microprocessor, different operation instructions correspond to different visual training modes, and the corresponding visual training mode can be switched by executing the corresponding operation instructions. The storage module can also store the user's historical training information, training plan information, etc.

[0067] According to an embodiment of the present invention, when the liquid lens is of the liquid crystal type or the electro-wetting type, the electrodes of the liquid lens are metal thin film transparent electrodes. The metal thin film transparent electrodes can be selected from silver thin films, gold thin films or silver-indium tin oxide composite films with high conductivity, high light transmittance and mechanical stability.

[0068] When performing visual detection and training through a traditional reversal lens, if the user's adjustment function is abnormal, the general ±2D is often not suitable, and it is necessary to replace the ±1.5D and ±1D lenses, and manual disassembly and replacement of the lenses are required. The present invention relies on the liquid lens to perform diopter switching, without the need to replace the lens, and can provide a diopter switching range of ±10D, and can smoothly increase and decrease the diopter step by step. While training the adjustment sensitivity, it also effectively improves the adjustment amplitude.

[0069] In the present invention, a liquid lens is used to replace the double-lens structure of the traditional flipper. The structure is simple, reducing mechanical movement wear and mechanical failures. By controlling the liquid lens to switch between a first diopter and a second diopter through a controller, visual training can be achieved. By controlling the diopter conversion speed of the liquid lens, different methods such as smooth diopter conversion or instant conversion can be realized, improving the user's adaptability to diopter conversion or enhancing the visual training effect. Through the non-fixed mode diopter control of the liquid lens, the user's eye tolerance can be reduced.

[0070] Although multiple embodiments of the present invention have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many changes, alterations, and alternative forms may occur to those skilled in the art without departing from the spirit and scope of the present invention. It should be understood that various alternatives to the embodiments of the present invention described herein may be employed in practicing the present invention. The appended claims are intended to define the scope of the present invention and thus cover equivalents or alternatives within the scope of these claims.

Claims

1. A visual training device, characterized in that: include: A support and a liquid lens disposed on the support; Controller; The controller is connected to the liquid lens and is configured to control the liquid lens to switch between a first refractive power and a second refractive power.

2. The visual training device according to claim 1, characterized in that: The liquid lens includes any one of a liquid crystal type, an electrowetting type, and a liquid-filled type.

3. The visual training device according to claim 1, characterized in that: The difference between the first diopter and the second diopter is 1-8.

4. The visual training device according to claim 1, characterized in that: The first diopter and the second diopter are fixed values ​​respectively, or, The first diopter and the second diopter are respectively change values.

5. The visual training device according to claim 1, characterized in that: The diopter of the liquid lens is switched in a uniform step-like manner, and the difference between each step is between 0.5D and 1D; or, The diopter of the liquid lens is switched in a non-uniform step-like manner, and the difference between each step is between 0D and 1D.

6. The visual training device according to claim 1, characterized in that: The controller includes a timing module, and the timing module is used to control the activation duration of the liquid lens.

7. The visual training device according to claim 1, characterized in that: The controller further comprises a speed control module, and the speed control module is used to control the speed at which the liquid lens switches between the first diopter and the second diopter.

8. The visual training device according to claim 1, characterized in that: The controller also includes a human-machine interface, The human-machine interface is used for the user to input control instructions for the liquid lens.

9. The visual training device according to claim 1, characterized in that: The controller also includes a storage module. The storage module is used to store at least one set of operating instructions for controlling the liquid lens.

10. The visual training device according to claim 1, characterized in that: When the liquid lens is of liquid crystal type or electrowetting type, the electrodes of the liquid lens are metal thin film transparent electrodes.

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