Apparatus for improving the visual perception ability of a person with respect to a particular eye condition of at least one eye, includes a client terminal including display device for displaying images to the person, and an input device for inputting responses by the person to images displayed in said display device; and a processor system programmed such that in an evaluation phase, the processor controls said display device to display to the person a plurality of images selected to test the visual perception ability of the person with respect to at least one visual defect, and utilizes responses inputted by the person via said input device to select another plurality of images designed to improve the visual perception ability of the person with respect to a detected visual defect; and in a treatment phase, the processor controls said display device to display to the person said another plurality of images to thereby improve the visual perception ability of the person with respect to said detected visual defect. The display device is a head-wearable display wearable over the eyes of said person and controlled by said processor system to display said plurality of images during both said evaluation phase and said treatment phase.