Abstract: A portable system and method for training an alternate retinal location of a viewer's eye with impaired retina and an assistance system for improving vision of such viewer's eye are disclosed. The portable system for training comprises an eye tracking module to provide eye information of the viewer's eye and a virtual image display module to display a virtual image centered at the alternate retinal location on the viewer's impaired retina other than centered at a fovea. The virtual image display module further comprises a first light signal generator to generate multiple first light signals and a first combiner to redirect the multiple first light signals towards the alternate retinal location, when a pupil of the viewer's eye is located approximately at the center of the viewer's eye.