provided is a vision training device including a display unit that provides a left eye image corresponding to a left eye of a user and a right eye image corresponding to a right eye of the user, a user input unit, and a controller that controls the display unit such that at least one of the left eye image and the right eye image is apart from the other after the left and right eye images are provided in a state in which image focuses of the images coincide with each other in terms of fusion, and stores, as fusional amplitude information, information indicating a separation distance between the left eye image and the right eye image when an image separation confirmation is input through the user input unit.
