A wearable device for correction of rotary strabismus

Abstract

The present application relates to the field of vision auxiliary treatment equipment, in particular to a wearable device for rotation strabismus correction, comprising an optical correction module installed on a head-mounted carrier, an adjustable mounting bracket arranged between the head-mounted carrier and the optical correction module, the optical correction module comprising an encapsulation shell, a light inlet opening arranged on the encapsulation shell, a first reflecting element and a second reflecting element arranged in the encapsulation shell, a Fresnel prism installed on the encapsulation shell and located on the light outlet direction side of the second reflecting element, and a tracking module installed on the head-mounted carrier and used to control the adjustable mounting bracket to adjust the encapsulation shell and / or the Fresnel prism for adaptive adjustment to realize real-time adaptive correction. Through the improvement of the device, the patient can simultaneously correct the visual field of the strabismus eye in the horizontal, vertical and rotation three dimensions.

Description

Technical Field

[0001] This invention relates to the field of vision-aiding treatment devices, and more specifically to wearable devices for correcting rotational strabismus. Background Technology

[0002] Rotational strabismus is one of the more complex clinical problems in strabismus, posing a challenge even to ophthalmologists. It is less readily apparent than horizontal or vertical strabismus, and cannot be diagnosed or analyzed using common strabismus examination methods such as corneal reflex test or alternating cover test. Furthermore, due to its rarity and the relatively specialized examination methods, rotational strabismus is frequently missed or misdiagnosed in clinical practice. Some cases of rotational strabismus are caused by lesions of the central nervous system (such as damage to the vestibular system, reticular system, and brain), and if not detected and treated promptly, it can be life-threatening.

[0003] Normally, the three-dimensional orientation of each eye is controlled by six extraocular muscles—the extraocular muscles control the eyeball to rotate horizontally (adduction and abduction), vertically (upward and downward), and rotationally (inward and outward). When the function of these muscles is impaired due to nerve damage, trauma, or congenital abnormalities, the patient is unable to maintain visual alignment, resulting in loss of binocular fusion and decreased stereoscopic depth perception.

[0004] Traditional treatments for strabismus often involve surgery or wearing special glasses combined with medication. However, surgery frequently has side effects. For patients with rotational strabismus exhibiting diplopia, prisms are commonly used for correction. Light passing through a prism is refracted towards its base, shifting the image towards its apex. By changing the angle of refraction, the strabismic eye can simultaneously focus on the same target as the normal eye. However, traditional prism lenses can only compensate for horizontal or vertical alignment errors and cannot correct rotational misalignment—standard Fresnel prism lenses cannot eliminate diplopia caused by rotational strabismus. Summary of the Invention

[0005] The purpose of this invention is to provide a wearable device for correcting rotational strabismus, in order to solve the above-mentioned problems. By improving the device, patients can simultaneously correct the deviation of the strabismic eye's visual field in three dimensions: horizontal, vertical, and rotational. It also has adaptive adjustment capabilities, real-time monitoring functions, and an intelligent operating experience.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] A wearable device for correcting rotational strabismus, comprising a head-mounted carrier;

[0008] An optical correction module is mounted on the head-mounted device;

[0009] An adjustable mounting bracket is disposed between the head-mounted carrier and the optical correction module, for adjusting at least the horizontal position, vertical position and spatial posture of the optical correction module relative to the wearer's eyeball;

[0010] The optical correction module includes a housing, a light inlet on the housing, a first reflective element and a second reflective element disposed inside the housing. The first reflective element reflects external light incident through the light inlet to the second reflective element, and the second reflective element reflects the light to the light-emitting direction.

[0011] A Fresnel prism is mounted on the encapsulation housing, located on the light-emitting side of the second reflective element, and configured to be rotatably mounted about the optical axis;

[0012] The tracking module, installed on the head-mounted device, is used to detect the position and rotation posture of the wearer's eyes in real time, and control the adjustable mounting bracket to adjust the encapsulation shell and / or Fresnel prism for adaptive adjustment to achieve real-time adaptive correction.

[0013] Preferably, the adjustable mounting bracket includes: a vertical slide rail, a horizontal slide rail, a first support ring, and a second support ring;

[0014] The first drive mechanism, connected to the adjustable mounting bracket, is used to drive the optical correction module to translate in the horizontal and / or vertical directions.

[0015] The second drive mechanism, connected to the adjustable mounting bracket, is used to drive the optical correction module to yaw and / or pitch rotation.

[0016] Preferably, the first driving mechanism includes a first linear motor and a second linear motor. The first linear motor is slidably disposed on the vertical slide rail and is used to drive the optical correction module to move in the vertical direction; the second linear motor is slidably disposed on the horizontal slide rail and is used to drive the optical correction module to move in the horizontal direction.

[0017] The first linear motor and the second linear motor are fixedly connected to the outside of the second support ring.

[0018] Preferably, the second drive mechanism includes a yaw micromotor and a pitch micromotor;

[0019] The inner side of the second support ring is connected to the outer side of the first support ring through the pitch micro motor to drive the first support ring and the components mounted thereon to pitch and rotate around the horizontal axis.

[0020] The inner side of the first support ring is connected to the packaging shell via the yaw micro motor to drive the packaging shell to yaw and rotate around the vertical axis.

[0021] Preferably, a third driving mechanism is provided between the Fresnel prism and the encapsulation shell, the third driving mechanism being used to drive the Fresnel prism to rotate around the optical axis.

[0022] Preferably, the third drive mechanism includes a rotation drive unit and a transmission component;

[0023] The Fresnel prism is mounted in a rotatable cage, and the outer periphery of the cage is provided with a toothed ring or a friction drive surface.

[0024] The rotation drive unit is fixed to the encapsulation shell, and the output end of the rotation drive unit is connected to the cage of the Fresnel prism through the transmission component to drive the Fresnel prism to rotate 360° around the optical axis.

[0025] Preferably, the rotation drive unit is a rotary micro motor;

[0026] The transmission component is a gear that meshes with the gear ring, or a friction wheel that contacts the friction transmission surface.

[0027] Preferably, the first reflective element is a first reflector disposed at the light inlet, and the second reflective element is a second reflector installed inside the encapsulation housing on the side away from the light inlet;

[0028] The first and second reflectors are configured such that external light is reflected twice before finally reaching the Fresnel prism, and the principal optical axis reflected by the second reflector passes through the light-transmitting area of ​​the Fresnel prism.

[0029] The present invention has the following technical effects:

[0030] (1) Three-dimensional omnidirectional correction capability: Through the reflection-refractive composite optical path structure, it can simultaneously correct eye deviation in the horizontal, vertical and rotational directions, filling the technical gap that traditional prisms cannot correct rotational strabismus.

[0031] (2) Real-time adaptive adjustment: The eye-tracking module is used to detect changes in eye position in real time. The posture of the optical correction module is dynamically adjusted through the closed-loop control system so that the correction effect adapts and follows the changes in the patient's eye position, effectively dealing with changes in gaze direction or dynamic drift of eye position.

[0032] (3) Non-invasive and safe: The correction is achieved by wearing optical methods, without surgical intervention, avoiding surgical risks and irreversible consequences, and is especially suitable for patients who are unwilling or unsuitable for surgery.

[0033] (4) Intelligent data management: Real-time recording of eye movement data and correction parameters, supporting remote medical follow-up and personalized treatment plan optimization, and providing quantitative data support for clinical research.

[0034] (5) Comfort and personalization: Made of lightweight materials and with a multi-degree-of-freedom adjustable structure, it can be adapted to users with different face shapes and interpupillary distances. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of the present invention;

[0037] Figure 2 This is a schematic diagram of the rear part of the structure of the present invention;

[0038] Figure 3 This is a schematic diagram of the front part of the present invention;

[0039] Figure 4 This is a schematic diagram of the structure of the present invention with the Fresnel prism removed;

[0040] Figure 5 This is a partial structural diagram of the packaging shell of the present invention in its transparent state;

[0041] Figure 6 This is a schematic diagram of the cross-sectional structure of the present invention;

[0042] Figure 7 This is a simplified optical path diagram of the present invention.

[0043] The components include: 1. Head-mounted carrier; 101. Vertical slide rail; 102. Horizontal slide rail; 103. First linear motor; 104. Second linear motor; 2. Encapsulation shell; 201. Light inlet; 202. Rotation micro motor; 203. First reflector; 204. Second reflector; 205. Holder; 3. First support ring; 301. Yaw micro motor; 4. Second support ring; 401. Pitch micro motor; 5. Fresnel prism; 6. Tracking module. Detailed Implementation

[0044] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] Example 1:

[0047] Reference Figures 1 to 7 As shown, this embodiment provides a wearable device for correcting rotational strabismus, including a head-mounted carrier 1;

[0048] An optical correction module is mounted on the head-mounted device 1;

[0049] An adjustable mounting bracket is positioned between the head-mounted carrier 1 and the optical correction module to adjust at least the horizontal position, vertical position, and spatial posture of the optical correction module relative to the wearer's eyeballs.

[0050] The optical correction module includes a package shell 2, a light inlet 201 opened on the package shell 2, a first reflective element and a second reflective element disposed inside the package shell 2. The first reflective element reflects external light incident through the light inlet 201 to the second reflective element, and the second reflective element reflects the light to the light output direction.

[0051] Fresnel prism 5 is mounted on the encapsulation housing 2, located on the light-emitting side of the second reflective element, and configured to be rotatably mounted about the optical axis;

[0052] The tracking module 6, installed on the head-mounted carrier 1, is used to detect the position and rotation posture of the wearer's eyes in real time, and control the adjustable mounting bracket to adjust the encapsulation shell 2 and / or Fresnel prism 5 to make adaptive adjustments to achieve real-time adaptive correction.

[0053] In this embodiment, the head-mounted carrier 1 is in the form of an eyeglass frame, and the encapsulation shell 2 adopts a cylindrical structure to facilitate the control of the rotation of the Fresnel prism 5. The Fresnel prism 5 is set with an eccentric sawtooth configuration, and the light emission direction of the second reflective element is towards the patient's eyeball. The Fresnel prism 5 is positioned between the second reflective element and the light path of the patient's eyeball.

[0054] The optimized design includes an adjustable mounting bracket comprising: a vertical slide rail 101, a horizontal slide rail 102, a first support ring 3, and a second support ring 4.

[0055] The first drive mechanism, connected to the adjustable mounting bracket, is used to drive the optical correction module 2 to translate in the horizontal and / or vertical directions.

[0056] The second drive mechanism, connected to the adjustable mounting bracket, is used to drive the optical correction module 2 to yaw and / or pitch rotation.

[0057] In a further optimized design, the first drive mechanism includes a first linear motor 103 and a second linear motor 104. The first linear motor 103 is slidably mounted on a vertical slide rail 101 and is used to drive the optical correction module 2 to move in the vertical direction. The second linear motor 104 is slidably mounted on a horizontal slide rail 102 and is used to drive the optical correction module 2 to move in the horizontal direction.

[0058] The first linear motor 103 and the second linear motor 104 are fixedly connected to the outside of the second support ring 4.

[0059] In this embodiment, the vertical slide rail 101 and the horizontal slide rail 102 are respectively fixedly connected to the frame of the head-mounted carrier 1, i.e., the glasses. A slider can be installed on the fixed end of the first linear motor 103 and the fixed end of the second linear motor 104. The corresponding sliders can be slidably connected with the vertical slide rail 101 and the horizontal slide rail 102. By controlling the extension and retraction of the first linear motor 103, the encapsulation shell 2 can be moved horizontally. By controlling the extension and retraction of the second linear motor 104, the encapsulation shell 2 can be moved vertically. Due to the setting of the sliders, there will be no lock-up between the independent operation of the first linear motor 103 and the second linear motor 104.

[0060] The scheme has been further optimized, and the second drive mechanism includes a yaw micro motor 301 and a pitch micro motor 401;

[0061] The inner side of the second support ring 4 is connected to the outer side of the first support ring 3 through a pitch micro motor 401, so as to drive the first support ring 3 and the components mounted on it to pitch and rotate around the horizontal axis.

[0062] The inner side of the first support ring 3 is connected to the package shell 2 via a yaw micro motor 301 to drive the package shell 2 to yaw and rotate around the vertical axis.

[0063] In this embodiment, the first support ring 3 is disposed inside the second support ring 4, and the two are coaxially arranged. The rotation axes of the yaw micro motor 301 and the pitch micro motor 401 are perpendicular to each other. In this way, when the pitch micro motor 401 and the yaw micro motor 301 are controlled to run independently, they can be controlled independently to achieve independent control of the pitch angle and yaw angle of the encapsulation shell 2.

[0064] In a further optimized design, a third driving mechanism is provided between the Fresnel prism 5 and the encapsulation shell 2. This third driving mechanism is used to drive the Fresnel prism 5 to rotate around the optical axis.

[0065] The scheme was further optimized, and the third drive mechanism includes a rotation drive unit and a transmission component;

[0066] The Fresnel prism 5 is mounted in a rotatable retainer 205, and the outer periphery of the retainer 205 is provided with a toothed ring or a friction drive surface;

[0067] The rotation drive unit is fixed on the encapsulation shell 2. The output end of the rotation drive unit is connected to the retainer 205 of the Fresnel prism 5 through the transmission component to drive the Fresnel prism 5 to rotate 360° around the optical axis.

[0068] The design was further optimized, and the rotation drive unit was changed to a rotation micro motor 202.

[0069] The transmission component is a gear that meshes with the gear ring 205, or a friction wheel that contacts the friction transmission surface.

[0070] In this embodiment, the rotating micro motor 202 is fixedly connected to the retainer 205. The output shaft of the rotating micro motor 202 drives the retainer 205 to rotate through a toothed ring or friction transmission surface provided on the outer periphery of the retainer 205, thereby driving the Fresnel prism 5 to rotate.

[0071] The scheme is further optimized by first reflecting element 203 set at light inlet 201 and second reflecting element 204 installed in the encapsulation housing on the side away from light inlet.

[0072] The first reflector 203 and the second reflector 204 are configured such that external light is reflected twice before finally reaching the Fresnel prism 5, and the principal optical axis reflected by the second reflector passes through the light-transmitting area of ​​the Fresnel prism 5.

[0073] Specifically, the principle of this invention is as follows:

[0074] The wearable device of this invention is worn and activated upon wearing. Components requiring power are powered by a rechargeable battery or lithium battery, which is installed inside the head-mounted carrier 1. The motor drive circuit is electrically connected to the tracking module 6, and also electrically connected to each micro-drive motor and the control module, converting control signals into drive current. A position feedback sensor, preferably a Hall sensor or photoelectric encoder, is installed on the output shaft of each micro-motor to detect the actual position of each joint and feed back position signals to the control module, forming a closed-loop control.

[0075] The tracking module 6 includes at least one miniature camera, preferably an infrared camera, mounted on the head-mounted frame facing the eyes, for acquiring images of both eyes. To accommodate differences in interpupillary distance among different users, the camera position can be designed to be adjustable.

[0076] Infrared illumination source: Installed near the camera to provide uniform active illumination for the eyes, improving the stability of image acquisition and the accuracy of pupil recognition.

[0077] Image processing unit: Electrically connected to a miniature camera, used for real-time analysis of acquired eye images. This unit executes the following algorithm flow: Pupil center localization—localizing the pupil contour based on Hough circle detection or convolutional neural network; Corneal reflector detection—identifying the reflected light spots generated by infrared light sources on the corneal surface; Eye position parameter calculation—based on the relative positional relationship between the pupil center and the corneal reflector, combined with a three-dimensional eyeball model, calculating the actual deviation angles of the two eyes in the horizontal, vertical, and rotational directions.

[0078] The image processing unit is preferably implemented using an embedded neural network processor (NPU) or a low-power microcontroller to meet real-time processing requirements.

[0079] The control module includes a microcontroller / microprocessor, memory, and a communication interface. It executes the following closed-loop control logic:

[0080] Initialization Phase: The control module receives preset values ​​of initial correction parameters from external devices (such as a smartphone app). These preset values ​​are based on the patient's clinical diagnostic data (provided by an ophthalmologist), including horizontal deviation, vertical deviation, and rotational deviation. The control module then drives the various micro-motors and linear motors to adjust the optical correction module to the initial correction position.

[0081] Real-time monitoring and adaptive adjustment phase: Continuously receive real-time eye position signals output from the eye-tracking module; compare the real-time eye position signals with the target alignment parameters to calculate the deviation; when the deviation exceeds a preset threshold, calculate the incremental parameters of each degree of freedom of adjustment according to a preset correction model; send drive signals to the adjustment actuator to achieve dynamic tracking correction. The correction model is based on geometric optics calculations, establishing a mapping relationship between the amount of eye deviation and the required optical offset.

[0082] Data recording and transmission: Eye-tracking data and correction parameters are recorded in real time to the built-in memory and transmitted to external terminal devices via a communication interface (preferably a Bluetooth Low Energy module) for patients and physicians to view and analyze.

[0083] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0084] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A wearable device for correcting rotational strabismus, characterized in that, Including head-mounted devices (1); An optical correction module is mounted on the head-mounted carrier (1); An adjustable mounting bracket is disposed between the head-mounted carrier (1) and the optical correction module, for adjusting the optical correction module relative to the wearer's eyeball at least the horizontal position, vertical position and spatial posture; The optical correction module includes a housing (2), a light inlet (201) opened on the housing (2), a first reflective element and a second reflective element disposed inside the housing (2). The first reflective element reflects external light incident through the light inlet (201) to the second reflective element, and the second reflective element reflects the light to the light output direction. A Fresnel prism (5) is mounted on the encapsulation shell (2), located on the light-emitting direction side of the second reflective element, and configured to be rotatably mounted about the optical axis; The tracking module (6) is installed on the head-mounted carrier (1) to detect the position and rotation posture of the wearer's eyes in real time, and to control the adjustable mounting bracket to adjust the encapsulation shell (2) and / or Fresnel prism (5) for adaptive adjustment to achieve real-time adaptive correction.

2. The wearable device for correcting rotational strabismus according to claim 1, characterized in that, The adjustable mounting bracket includes: a vertical slide rail (101), a horizontal slide rail (102), a first support ring (3), and a second support ring (4); The first drive mechanism is connected to the adjustable mounting bracket and is used to drive the optical correction module (2) to translate in the horizontal and / or vertical directions; The second drive mechanism, connected to the adjustable mounting bracket, is used to drive the optical correction module (2) to yaw and / or pitch.

3. A wearable device for correcting rotational strabismus according to claim 2, characterized in that, The first driving mechanism includes a first linear motor (103) and a second linear motor (104). The first linear motor (103) is slidably disposed on the vertical slide rail (101) and is used to drive the optical correction module (2) to move in the vertical direction. The second linear motor (104) is slidably disposed on the horizontal slide rail (102) and is used to drive the optical correction module (2) to move in the horizontal direction. The first linear motor (103) and the second linear motor (104) are fixedly connected to the outside of the second support ring (4).

4. A wearable device for correcting rotational strabismus according to claim 2, characterized in that, The second drive mechanism includes a yaw micro motor (301) and a pitch micro motor (401). The inner side of the second support ring (4) is connected to the outer side of the first support ring (3) through the pitch micro motor (401) to drive the first support ring (3) and the components mounted thereon to pitch and rotate around the horizontal axis. The inner side of the first support ring (3) is connected to the encapsulation shell (2) through the yaw micro motor (301) to drive the encapsulation shell (2) to yaw and rotate around the vertical axis.

5. A wearable device for correcting rotational strabismus according to claim 1, characterized in that, A third driving mechanism is provided between the Fresnel prism (5) and the encapsulation shell (2), the third driving mechanism being used to drive the Fresnel prism (5) to rotate around the optical axis.

6. A wearable device for correcting rotational strabismus according to claim 5, characterized in that, The third driving mechanism includes a rotation driving unit and a transmission component; The Fresnel prism (5) is mounted in a rotatable retainer (205), and the outer periphery of the retainer (205) is provided with a toothed ring or a friction drive surface; The rotation drive unit is fixed on the encapsulation shell (2), and the output end of the rotation drive unit is connected to the retainer (205) of the Fresnel prism (5) through the transmission component to drive the Fresnel prism (5) to rotate 360° around the optical axis.

7. A wearable device for correcting rotational strabismus according to claim 6, characterized in that, The rotation drive unit is a rotation micro motor (202). The transmission component is a gear that meshes with the gear ring (205), or a friction wheel that contacts the friction transmission surface.

8. A wearable device for correcting rotational strabismus according to claim 1, characterized in that, The first reflective element is a first reflector (203) disposed at the light inlet (201), and the second reflective element is a second reflector (204) installed in the encapsulation housing on the side away from the light inlet. The first reflector (203) and the second reflector (204) are configured such that external light is reflected twice and finally directed toward the Fresnel prism (5), and the principal optical axis reflected by the second reflector passes through the light-transmitting area of ​​the Fresnel prism (5).

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