A vision training device according to an embodiment of the present invention includes a deviation angle determining unit that determines a deviation angle and a deviation direction of a user, a strabismus correction value determining unit that determines at least one or more correction prism diopters and a correction direction based on the deviation angle and the deviation direction, a vision training unit that determines at least one of the correction prism diopters as a training range and guides movement of the user's eye in the deviation direction and the correction direction, and a refraction angle adjusting unit that changes a refraction angle of light entering the user's eye according to the deviation angle or at least one or more correction prism diopters included in the training range. Through vision training, weak eye muscles, which are the root cause of strabismus, can be strengthened.

The present invention relates to an apparatus and method for providing virtual reality-based eye movement exercise and visual perception training, wherein a dichoptic presentation is provided in consideration of the deviation of a user's eyeball so as to prevent additional damage to stereoscopic vision due to suppression, and is provided by adjusting the degree of difficulty by changing the locations of visual stimuli on the basis of the level of deviation and training capability of the user, thus making it possible for the user to not only receive training suitable for the user's condition, but also simultaneously undergo visual perception training including eye exercise (movement) training and stereoscopic perception recognition.

Examples of assessing vergence capability of an individual are described. In an example, a first random dot stereogram is generated. The first random dot stereogram includes a first random arrangement of dots and a first sub-portion positioned against the first random dot stereogram. Thereafter, an input from an individual, identifying the position of the first sub-portion against the first random dot stereogram may be received. In response to receiving the input, a second random dot stereogram comprising a second sub-portion positioned against the second random dot stereogram, is generated. The second random dot stereogram comprises a second random arrangement which is different from the first random arrangement of dots in the preceding first random dot stereogram. In response to the second random dot stereogram, another input to identify position of the second sub-portion against the second random dot stereogram is received.

A visual function improvement system using a virtual reality-based digital device includes a video headset having a wearing unit for allowing a user to wear a headset on a head, a separate display configured to display separated visual stimulation images to left and right eyes of the user, respectively, and an image providing unit configured to provide a visual stimulation video or image to the separate display. The image providing unit includes a binocular visual stimulation image providing unit configured to separately provide a converted image and a normal image to the separate display so that an amblyopic eye is activated by providing an unclear image to a normal fellow eye among two eyes to improve visual function imbalance of the two eyes.

An amblyopia training device includes a bracket unit, a virtual reality unit including a display headset, a dichoptic training unit with contrast color filters including first and second contrast color filters, a binaural audio stimulation unit including paired speakers for playing binaural beats music, a transcranial stimulation unit connected to the rear side part, and a control unit. The bracket unit includes top and rear side parts, and ears part. The control unit is electrically connected with the display headset, the speaker and the transcranial stimulation unit. The amblyopia training device provided by the invention can stimulate the user in various ways through the display headset, the speaker, the first and second contrast color filters and the transcranial stimulation unit, so as to achieve the synergistical effect of activating the visual center of the user to increase the visual acuity in person with amblyopia.

A visual function training system comprising: a first display device configured to display an image to one eye of a user; a second display device configured to display an image to an opposite eye of the user; and a display control unit configured to control an object to be operated by the user, which is displayed on the first and second display devices, to have different transparencies on the first and second display devices.