Patent Application
20240288716
The present invention provides a virtual reality head-mounted display device with built-in strabismus treatment, especially a head-mounted device integrate prism diopter simulation system.
Human beings can see the outer real view via eyes, but the eye is the same as other organs, people will get vision disorders by abnormal eyes caused by genetics or environmental reason. The refractive error is out of focus (such as shortsightedness and longsightedness) or misaligned (such as strabismus or astigmatism).
Both eyes of a healthy individual are aligned and the visual axes are parallel under most viewing conditions. Strabismus is a visual disorder in which the eyes are misaligned. The primary therapeutic goal for strabismus is a comfortable, single, clear, normal binocular vision at all distances and directions of gaze. Strabismus is usually treated with a combination of eyeglasses and surgery.
The strabismus test includes mainly Hirschberg test, cover-uncover test, prism cover test. The Hirschberg test is the inspector focus on a fix object with a certain distance. In a person with normal ocular alignment the light reflex lies slightly nasal from the center of the cornea (i.e. the light reflex is symmetrical). Otherwise, a person with strabismus the light reflex is unsymmetrical. The deviation angle can be measured by a suitable prism. The second test is a cover-uncover test. The patient focus on an object with a short distance or a long distance and a cover is placed over an eye. The patient is required to fixate on an object while the examiner repeats the test several times using prism lenses with a variety of strengths and directions in order to measure the deviation angles. Final test is prism cover test, the degree of eye misalignment is established by neutralizing the uncovered eye movements using a prism bar or prism lenses. This test should be performed separately for horizontal and vertical strabismus. However, this test requires a patient's cooperation and is quite complicated to perform. The cover and prism cover tests require the subjective judgment of the specialist to determine the existence of eye movements between consecutive cover/uncover steps. All the above tests are complicated to perform and are imprecise, prolonged, and have to be performed by a specialist.
In addition, virtual reality digital imaging equipment rise gradually in the market, but virtual reality head-mounted displays do not provide suitable images for people with poor vision. There is an urgent problem to solve in the market which is to provide suitable images on a head-mounted display device suitable for strabismus patients.
The present invention provides a head-mounted display device with built-in strabismus treatment. The head-mounted display device comprises a display unit, detecting unit, processing module, and graphic simulation unit. The display unit displays a test image to a user for test. The detecting unit detects a deviation angle of eyeballs of the user when the user focus on the test image. The processing module connects to the display unit and the detecting unit. The graphic simulation unit connects to the display unit and the processing module. The graphic simulation unit and the processing module obtain and analyze the deviation angle from the detecting unit, and the graphic simulation unit and the processing module output a compensated image to the display unit according to an analyzing result.
The operation method of the head-mounted display device of the embodiment of the present invention comprises follow steps: (A) providing a head-mounted display device of claim 1. (B) displaying the test image to the user for test. (C) detecting a deviation angle of eyeballs of the user when the user focus on the test image. (D) simulating to obtain the modified test image by the deviation angle from the detecting unit. (E) providing the modified test image to the user for test again and repeating step (B)-(E) until the deviation angle is equal to 0 degree and thereby the processing module obtain the compensated angle of the user. (F) the processing module generates the compensated image by the compensated angle, and the compensated image is displayed on the display unit for the user.
The above-mentioned descriptions are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all the shapes, structures, features, and spirits described in the scope of the patent application of the present invention shall be regarded as equivalent to the changes and modifications per se, and be included in the scope of the patent application of the present invention.
Thereinafter, to make the description of the present disclosure more detailed and complete, the following description provides an illustrative description for the implementation and specific embodiments of the present invention. However, the following description is not the only form of implementing or using specific embodiments of the invention. In these paragraphs, the features of various specific embodiments are covered as well as the method steps and sequences for constructing and operating these specific embodiments. However, the other embodiments may also be utilized to achieve the same or equivalent function and sequence of steps.
The present invention can inspect the defect of the eyes and generate compensated images to treat some people with visual disorders.
As shown in
Furthermore, as shown in
In the final step of the test, when the device is detecting the user's the deviation angle is equal to 0 degree, the processing module 300 will get the compensated angle. The processing module 300 comprises the central processing unit and graphic processing unit. The central processing unit cooperates with the graphic processing unit to process by the compensated angle, and get a compensated image that is suitable for the user UE (i.e. strabismus treatment image). The compensated images of each eye display respectively on the head-mounted display device 10 make the user UE get the best visual experience. In addition, the head-mounted display device 10 will modify the rotation angle, and the deflection angle of the image to integrate the simulated result from prism diopter lens simulation system. Hence, the above simulated result makes the head-mounted display device display these images which are as same as prism diopter lens simulation system generated. Moreover, when the virtual reality function of the head-mounted display device 10 turns on, the processing unit 300 will output the compensated image which decreases the compensated angle. The decreased angle is calculated from the head-mounted display device 10 detects automatically the eye real-time movement of the user UE. The decreased angle is advantage to improve the user's strabismus and the head-mounted display device 10 could achieve visual treatment.
Specifically, during the user UE uses the application or plays virtual reality games, if the detecting unit 200 detects a significant movement of the user's eyes or head, the processing unit 300 will adjust the prism diopter to simulate the lens with a lower resolution. The prism diopter is defined as when the patient's left eye focus on an object placed 6 meters in front of the eyes (the middle of the field of vision), the place where the right eye focus on will deflect a distance relative to the middle.
According to the research, when the movement of user's head or eye is more than a certain range, the user cannot find the slight change of the scene. Hence, this adjustment of the prism diopter will not be felt easily by the user. Furthermore, the user will adapt to the environment with lower degree after using for long-term, and that can achieve the vision treatment.
The above-mentioned descriptions are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all the shapes, structures, features, and spirits described in the scope of the patent application of the present invention shall be regarded as equivalent to the changes and modifications per se, and be included in the scope of the patent application of the present invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 112107179 | Feb 2023 | TW | national |
