 More recent reports on perceptual learning, an active form of therapy in which amblyopic subjects practice a position-discrimination task, have shown a mean acuity improvement of approximately 30 two lines in amblyopic children and adults who had completed occlusion therapy. These studies provide support for the notion that the practice of particular visual skills under conditions that provide the patient with feedback e.g., vision therapy may be beneficial in improving the visual performance of amblyopic eyes. 