The disclosure describes an apparatus (100) for improving a visual function, having a first display element (1) for displaying at least one moving grid (110) consisting of grid elements (120) at least one portable closure element (2) for the occlusion of at least one eye a portable eye tracking device (3) for measuring at least one characteristic value of a non-occluded eye a first control unit (5) having a first communication interface (140) to the eye tracking device (3) and a second communication interface (150) to the at least one closure element (2) and a second control unit (6) connected to the display element (1), with a third communication interface (160) to the first control unit (5). The second control unit (6) is adapted to provide a display to a non-occluded eye of the moving grids (110) on the first display element (1) controlled on the basis of the characteristic values measured by the eye tracking device (3), wherein the display to a non-occluded eye on the first display element (1) is controlled in such a fashion that additionally attention-capturing stimuli (130) are displayed.
