Apparatus and method for checking the visual axis deviation of a binocular depth perception scene

Abstract

The application provides a binocular depth perception scene visual axis deviation inspection device, which comprises a depth perception space scene construction module, an inspection target generator, an inspection target controller, a processing terminal, a display module and an inspection equipment; the application also provides a binocular depth perception scene visual axis deviation inspection method, which is realized based on the binocular depth perception scene visual axis deviation inspection device. The application provides a binocular depth perception scene visual axis deviation inspection device and method, realizes the inspection of the visual axis deviation of the binocular natural state (including the plane and the depth perception) of a subject, and solves the problem that the visual axis deviation in the depth cannot be inspected at present.

Description

Technical Field

[0001] This invention relates to the technical field of visual axis deviation testing, and more specifically, to a device and method for visual axis deviation testing in binocular depth perception scenarios. Background Technology

[0002] Binocular vision includes fixation stability, inhibition, crowding, binocular anisotropy, and binocular imbalance. The ability to maintain a stable fixation is a fundamental aspect of good visual function.

[0003] During normal fixation, the eyeballs constantly undergo involuntary, minute eye movements, including small drifts, microsaccades, and nystagmus. When there is relative movement between the visual object and the object, people with normal vision can stabilize their gaze by continuously moving their eyes, thus maintaining their visual acuity. However, for people with visual impairments, both moving and stationary objects may become blurry in the face of this relative movement. Sometimes, even stationary objects may appear to be moving, resulting in perceptual visual axis deviation, where the image seen by the human eye shifts at the fovea of ​​the retina, making it impossible to see objects clearly.

[0004] Fixation instability can affect a person's motor skills, reading ability, and driving ability. For example, in sports like soccer and basketball, fixation instability can lead to inaccurate positioning of the ball (target) in natural states (including both planar and depth perception). Currently, only planar perceptual axis deviations can be detected, not depth perceptual axis deviations. Therefore, it is difficult to detect this type of binocular visual impairment caused by fixation instability, leading patients to miss the optimal treatment period. Summary of the Invention

[0005] To overcome the current technical shortcomings of not being able to check for visual axis deviations in depth perception, this invention provides a device and method for checking visual axis deviations in binocular depth perception scenarios.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0007] A device for checking visual axis deviation in a binocular depth perception scene includes a depth perception spatial scene construction module, a target generator, a target controller, a processing terminal, a display module, and a checking device.

[0008] The depth perception spatial scene construction module is used to construct a depth perception spatial scene and establish a spatial coordinate system in the depth perception spatial scene;

[0009] The inspection target generator is used to generate a first inspection target and a second inspection target in a depth perception space scene;

[0010] The inspection target controller is used to control the movement of the first inspection target or the second inspection target in the depth perception space scene and send a confirmation signal to the processing terminal.

[0011] The processing terminal is used to obtain the spatial coordinate system, the initial coordinate values ​​of the center points of the first and second inspection targets, and the movement commands and parameters of the first and second inspection targets from the depth perception spatial scene construction module, the inspection target generator, and the inspection target controller, respectively, and to obtain the coordinate values ​​of the first and second inspection targets when the confirmation signal is received through data processing; it is also used to obtain the perceptual visual axis deviation value of the subject according to a preset algorithm based on the coordinate values ​​of the first and second inspection targets when the confirmation signal is received.

[0012] The display module is used to display the depth perception space scene, the first inspection target, the second inspection target, and the perceptual visual axis deviation value;

[0013] The examination equipment is used to assist the subject in observation;

[0014] The outputs of the depth perception spatial scene construction module, the target generator, and the target controller are respectively connected to the input of the processing terminal, and the output of the processing terminal is connected to the input of the display module.

[0015] In the above scheme, after the subject wears the examination device, the first or second examination target is moved in the depth perception space scene by the examination target controller until the first and second examination targets are observed to overlap. The subject's perceptual visual axis deviation value is obtained according to the coordinate values ​​of the center points of the first and second examination targets and a preset algorithm, so as to realize the examination of the subject's perceptual visual axis deviation in the natural state of both eyes (including in plane and depth perception).

[0016] Preferably, the depth perception spatial scene construction module is further used to construct a noise model; the noise model is used to stimulate the subject's peripheral vision and interfere with the subject's observation of the first inspection target and the second inspection target.

[0017] Preferably, the first inspection target and the second inspection target do not obstruct each other.

[0018] Preferably, the first inspection target and the second inspection target are two-dimensional images with different colors, and the first inspection target and the second inspection target have a depth perception relationship due to the color difference.

[0019] Preferably, the color of either the first inspection target or the second inspection target is red, and the color of the other is green or blue.

[0020] Preferably, the inspection device includes red-green glasses and 3D spectral separation glasses.

[0021] Preferably, the perceptual visual axis deviation value includes a first perceptual visual axis deviation value, a second perceptual visual axis deviation value, and a third perceptual visual axis deviation value.

[0022] Preferably, the observation distance is 0.8m, 1.5m, 3m or 5m.

[0023] A method for checking visual axis deviation in a binocular depth perception scene, implemented based on the aforementioned binocular depth perception scene visual axis deviation checking device, includes the following steps:

[0024] S1: Construct a depth perception spatial scene, establish a spatial coordinate system in the depth perception spatial scene, and have the subject wear any kind of examination device, and initialize the number of observations i = 0;

[0025] S2: Generate the first and second inspection targets at random locations in the depth perception space scene, record the initial coordinates of the center points of the first and second inspection targets, and let i = i + 1;

[0026] S3: The subject controls the movement of the first or second inspection target in the depth perception space scene through the inspection target controller;

[0027] When the subject observes that the first inspection target or the second inspection target overlaps in the depth perception space scene, the inspection target controller sends a confirmation signal to the processing terminal, and the processing terminal obtains the coordinate values ​​of the first inspection target and the second inspection target at this time.

[0028] S4: If the examination device worn by the subject is red-green glasses, the first perceptual visual axis deviation value and the second perceptual visual axis deviation value are obtained according to the coordinate values ​​of the first and second examination targets obtained in step S3 and the preset algorithm.

[0029] If the examination device worn by the subject is 3D spectral separation glasses, the third perceptual visual axis deviation value is obtained according to the coordinate values ​​of the first and second examination targets obtained in step S3 and the preset algorithm.

[0030] S5: Determine if i equals 2;

[0031] If so, proceed to step S6;

[0032] If not, have the subject wear another examination device and return to step S2;

[0033] S6: The perceptual visual axis deviation of the subject in a natural state is obtained by combining the first perceptual visual axis deviation value, the second perceptual visual axis deviation value, and the third perceptual visual axis deviation value.

[0034] Preferably, the first perceptual visual axis deviation value corresponds to the lateral distance between the first inspection target and the second inspection target, the second perceptual visual axis deviation value corresponds to the longitudinal distance between the first inspection target and the second inspection target, and the third perceptual visual axis deviation value corresponds to the depth distance between the first inspection target and the second inspection target.

[0035] Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

[0036] This invention provides a device and method for checking visual axis deviation in a binocular depth perception scene. After the subject wears the examination device, the first or second examination target is moved in the depth perception space scene by the examination target controller until the first and second examination targets are observed to overlap. The subject's visual axis deviation value is obtained according to the coordinate values ​​of the center points of the first and second examination targets by a preset algorithm, thereby realizing the examination of visual axis deviation of the subject's binoculars in a natural state (including in planar and depth perception). Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the module connection of the present invention;

[0038] Figure 2 This is an example diagram illustrating the combination of the first inspection target, the second inspection target, and the noise model in this invention.

[0039] Figure 3 This is a flowchart illustrating the implementation steps of the technical solution of the present invention. Detailed Implementation

[0040] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent.

[0041] To better illustrate this embodiment, some parts in the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions;

[0042] It will be understood by those skilled in the art that certain well-known structures and their descriptions may be omitted in the accompanying drawings.

[0043] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0044] Example 1

[0045] like Figure 1-2As shown, a device for checking visual axis deviation in a binocular depth perception scene includes a depth perception spatial scene construction module, a target generator, a target controller, a processing terminal, a display module, and an inspection device. The depth perception spatial scene construction module is used to construct a depth perception spatial scene and establish a spatial coordinate system within it. The target generator is used to generate a first and a second target within the depth perception spatial scene. The target controller is used to control the movement of the first or second target within the depth perception spatial scene and send a confirmation signal to the processing terminal. The processing terminal is used to obtain the spatial coordinate system and initial... The system includes the coordinates of the center points of the first and second inspection targets, the movement commands and parameters of the first and second inspection targets, and the coordinates of the first and second inspection targets when a confirmation signal is received, obtained through data processing. It also uses a preset algorithm to obtain the subject's perceptual visual axis deviation value based on the coordinates of the first and second inspection targets when the confirmation signal is received. The display module displays the depth perception space scene, the first inspection target, the second inspection target, and the perceptual visual axis deviation value. The inspection device assists the subject in observation. The outputs of the depth perception space scene construction module, the inspection target generator, and the inspection target controller are connected to the input of the processing terminal, and the output of the processing terminal is connected to the input of the display module.

[0046] In the specific implementation process, after the subject wears the examination device, the first or second examination target is moved in the depth perception space scene by the examination target controller until the first and second examination targets are observed to overlap. The examination target controller sends a confirmation signal to the processing terminal. According to the coordinate values ​​of the center points of the first and second examination targets at the time of confirmation, the subject's perceptual visual axis deviation value is obtained according to the preset algorithm, so as to realize the examination of the subject's perceptual visual axis deviation in the natural state of both eyes (including in planar and depth perception).

[0047] Example 2

[0048] A device for checking visual axis deviation in a binocular depth perception scene includes a depth perception spatial scene construction module, a target generator, a target controller, a processing terminal, a display module, and an inspection device. The depth perception spatial scene construction module is used to construct a depth perception spatial scene and establish a spatial coordinate system within it. The target generator is used to generate a first inspection target and a second inspection target within the depth perception spatial scene. The target controller is used to control the movement of the first or second inspection target within the depth perception spatial scene and send a confirmation signal to the processing terminal. The processing terminal is used to obtain the spatial coordinate system and initial position of the first or second inspection target from the depth perception spatial scene construction module, the target generator, and the target controller, respectively. The system includes the coordinates of the center points of the first and second inspection targets, the movement commands and parameters of the first and second inspection targets, and the coordinates of the first and second inspection targets when a confirmation signal is received, obtained through data processing. It also uses a preset algorithm to obtain the subject's perceptual visual axis deviation value based on the coordinates of the first and second inspection targets when the confirmation signal is received. The display module displays the depth perception space scene, the first inspection target, the second inspection target, and the perceptual visual axis deviation value. The inspection device assists the subject in observation. The outputs of the depth perception space scene construction module, the inspection target generator, and the inspection target controller are connected to the input of the processing terminal, and the output of the processing terminal is connected to the input of the display module.

[0049] More specifically, the depth perception spatial scene construction module is also used to construct a noise model; the noise model is used to stimulate the subject's peripheral visual field, interfering with the subject's observation of the first and second inspection targets. Figure 2 The cross and circle in the center are the first (second) inspection target and the second (first) inspection target, respectively, and the area around the circle consists of several moving noise models.

[0050] More specifically, the first inspection target and the second inspection target do not obstruct each other.

[0051] More specifically, the first inspection target and the second inspection target are two-dimensional images with different colors, and the first inspection target and the second inspection target have a depth perception relationship due to the color difference.

[0052] More specifically, the color of either the first inspection target or the second inspection target is red, and the color of the other is green or blue.

[0053] More specifically, the inspection equipment includes red-green glasses and 3D spectral separation glasses.

[0054] In practice, existing red-green glasses consist of a red lens and a green lens. The red and green lenses filter red and green wavelengths of light, respectively. When a subject observes a red-green / red-blue image through these glasses, both eyes simultaneously only see the unfiltered image, thus creating different images for each eye. 3D spectral separation glasses (or light-separation glasses for short) are an existing product that uses colorful diffraction technology and special holographic light-separation lenses to create a stereoscopic visual effect. By changing the wavelength of colors, red light is refracted less than blue light, resulting in a difference between the red and blue images on the retina. 3D spectral separation glasses can effectively enhance the light separation aberration effect and present color illusions at different locations, such as making red-series effects more prominent and blue-series effects deeper.

[0055] More specifically, the perceptual visual axis deviation values ​​include the first perceptual visual axis deviation value, the second perceptual visual axis deviation value, and the third perceptual visual axis deviation value.

[0056] More specifically, the observation distances are 0.8m, 1.5m, 3m, or 5m.

[0057] In the specific implementation process, after the subject wears red-green glasses (3D spectral separation glasses), the target controller moves either the first or second target within the depth perception space scene until the first and second targets are observed to overlap. At this point, the target controller sends a confirmation signal to the processing terminal. Based on the coordinates of the center points of the first and second targets at the time of confirmation, a preset algorithm is used to obtain the subject's first and second perceptual visual axis deviation values ​​(and third perceptual visual axis deviation values). Then, the subject changes back to wearing the 3D spectral separation glasses (red-green glasses), and the target controller again moves either the first or second target within the depth perception space scene. When the first and second inspection targets are observed to overlap, a confirmation signal is sent to the processing terminal using the inspection target controller. Based on the coordinates of the center points of the first and second inspection targets at the time of confirmation, the subject's third perceptual visual axis deviation value (first perceptual visual axis deviation value and second perceptual visual axis deviation value) is obtained according to a preset algorithm. The first perceptual visual axis deviation value corresponds to the lateral distance between the first and second inspection targets, the second perceptual visual axis deviation value corresponds to the longitudinal distance between the first and second inspection targets, and the third perceptual visual axis deviation value corresponds to the depth distance between the first and second inspection targets. This enables the inspection of the subject's perceptual visual axis deviation in a natural state (including in planar and depth perception).

[0058] In practical implementation, when the observation distance is 0.8m, a smaller display module, such as 6-6.5 inches, is generally selected; when the observation distance is 1.5m or 3m, a medium-sized display module, such as 10-13 inches, is generally selected; and when the observation distance is 5m, a larger display module, such as 32 inches, is generally selected. Additionally, technicians can set preset algorithms according to actual needs, such as setting the proportional relationship between the coordinate spacing of the spatial coordinate system and the perceptual visual axis deviation value. The difference in coordinate values ​​between the center points of the first and second inspection targets at the time of confirmation is then converted according to this proportional relationship to obtain the corresponding perceptual visual axis deviation value.

[0059] Example 3

[0060] like Figure 3 As shown, a method for checking visual axis deviation in a binocular depth perception scene, implemented based on the aforementioned binocular depth perception scene visual axis deviation checking device, includes the following steps:

[0061] S1: Construct a depth perception spatial scene, establish a spatial coordinate system in the depth perception spatial scene, and have the subject wear any kind of examination device, and initialize the number of observations i = 0;

[0062] S2: Generate the first and second inspection targets at random locations in the depth perception space scene, record the initial coordinates of the center points of the first and second inspection targets, and let i = i + 1;

[0063] S3: The subject controls the movement of the first or second inspection target in the depth perception space scene through the inspection target controller;

[0064] When the subject observes that the first inspection target or the second inspection target overlaps in the depth perception space scene, the inspection target controller sends a confirmation signal to the processing terminal, and the processing terminal obtains the coordinate values ​​of the first inspection target and the second inspection target at this time.

[0065] S4: If the examination device worn by the subject is red-green glasses, the first perceptual visual axis deviation value and the second perceptual visual axis deviation value are obtained according to the coordinate values ​​of the first and second examination targets obtained in step S3 and the preset algorithm.

[0066] If the examination device worn by the subject is 3D spectral separation glasses, the third perceptual visual axis deviation value is obtained according to the coordinate values ​​of the first and second examination targets obtained in step S3 and the preset algorithm.

[0067] S5: Determine if i equals 2;

[0068] If so, proceed to step S6;

[0069] If not, have the subject wear another examination device and return to step S2;

[0070] S6: The perceptual visual axis deviation of the subject in a natural state is obtained by combining the first perceptual visual axis deviation value, the second perceptual visual axis deviation value, and the third perceptual visual axis deviation value.

[0071] More specifically, the first perceptual visual axis deviation value corresponds to the lateral distance between the first and second inspection targets, the second perceptual visual axis deviation value corresponds to the longitudinal distance between the first and second inspection targets, and the third perceptual visual axis deviation value corresponds to the depth distance between the first and second inspection targets.

[0072] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A method for detecting visual axis deviation in binocular depth perception scenes, characterized in that, Includes the following steps: S1: Construct a depth perception spatial scene, establish a spatial coordinate system in the depth perception spatial scene, and have the subject wear any kind of examination device, and initialize the number of observations i=0; S2: Generate the first and second inspection targets at random locations in the depth perception space scene, record the coordinates of the center points of the first and second inspection targets at the initial time, and let i = i + 1; S3: The subject controls the movement of the first or second inspection target in the depth perception space scene through the inspection target controller; When the subject observes that the first inspection target or the second inspection target overlaps in the depth perception space scene, the inspection target controller sends a confirmation signal to the processing terminal, and the processing terminal obtains the coordinate values ​​of the first inspection target and the second inspection target at this time. S4: If the examination device worn by the subject is red-green glasses, the first perceptual visual axis deviation value and the second perceptual visual axis deviation value are obtained according to the coordinate values ​​of the first and second examination targets obtained in step S3 and the preset algorithm. If the examination device worn by the subject is 3D spectral separation glasses, the third perceptual visual axis deviation value is obtained according to the coordinate values ​​of the first and second examination targets obtained in step S3 and the preset algorithm. S5: Determine if i equals 2; If so, proceed to step S6; If not, have the subject wear another examination device and return to step S2; S6: The perceptual visual axis deviation of the subject in a natural state is obtained by combining the first perceptual visual axis deviation value, the second perceptual visual axis deviation value and the third perceptual visual axis deviation value; the first perceptual visual axis deviation value corresponds to the lateral distance between the first and second examination targets, the second perceptual visual axis deviation value corresponds to the longitudinal distance between the first and second examination targets, and the third perceptual visual axis deviation value corresponds to the depth distance between the first and second examination targets.

2. A device for checking visual axis deviation in a binocular depth perception scene for implementing the method for checking visual axis deviation in a binocular depth perception scene as described in claim 1, characterized in that, It includes a depth perception spatial scene construction module, an inspection target generator, an inspection target controller, a processing terminal, a display module, and an inspection device; The depth perception spatial scene construction module is used to construct a depth perception spatial scene and establish a spatial coordinate system in the depth perception spatial scene; The inspection target generator is used to generate a first inspection target and a second inspection target in a depth perception space scene; The inspection target controller is used to control the movement of the first inspection target or the second inspection target in the depth perception space scene and send a confirmation signal to the processing terminal. The processing terminal is used to obtain the spatial coordinate system, the initial coordinate values ​​of the center points of the first and second inspection targets, and the movement commands and parameters of the first and second inspection targets from the depth perception spatial scene construction module, the inspection target generator, and the inspection target controller, respectively, and to obtain the coordinate values ​​of the first and second inspection targets when the confirmation signal is received through data processing; it is also used to obtain the perceptual visual axis deviation value of the subject according to a preset algorithm based on the coordinate values ​​of the first and second inspection targets when the confirmation signal is received. The display module is used to display the depth perception space scene, the first inspection target, the second inspection target, and the perceptual visual axis deviation value; The examination device is used to assist the subject in observation; The outputs of the depth perception spatial scene construction module, the target generator, and the target controller are respectively connected to the input of the processing terminal, and the output of the processing terminal is connected to the input of the display module.

3. The visual axis deviation detection device for binocular depth perception scenarios according to claim 2, characterized in that, The depth perception spatial scene construction module is also used to construct a noise model; the noise model is used to stimulate the subject's peripheral vision and interfere with the subject's observation of the first and second inspection targets.

4. The visual axis deviation detection device for binocular depth perception scenarios according to claim 2, characterized in that, The first and second inspection targets do not obstruct each other.

5. The visual axis deviation detection device for binocular depth perception scenarios according to claim 4, characterized in that, The first inspection target and the second inspection target are two-dimensional images with different colors, and the first inspection target and the second inspection target have a depth perception relationship due to the color difference.

6. The visual axis deviation detection device for binocular depth perception scenarios according to claim 5, characterized in that, The color of either the first inspection target or the second inspection target is red, and the color of the other target is green or blue.

7. The visual axis deviation detection device for binocular depth perception scenarios according to claim 6, characterized in that, The inspection equipment includes red-green glasses and 3D spectral separation glasses.

8. The visual axis deviation detection device for binocular depth perception scenarios according to claim 2, characterized in that, The perceptual visual axis deviation values ​​include the first perceptual visual axis deviation value, the second perceptual visual axis deviation value, and the third perceptual visual axis deviation value.

9. The visual axis deviation detection device for binocular depth perception scenarios according to claim 2, characterized in that, The observation distances are 0.8m, 1.5m, 3m or 5m.

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