Eye patching is used in the orthoptic management[2] of children at risk of lazy eye (amblyopia), especially strabismic or anisometropic[3] amblyopia. These conditions can cause visual suppression of areas of the dissimilar images[4] by the brain such as to avoid diplopia, resulting in a loss of visual acuity in the suppressed eye and in extreme cases in blindness in an otherwise functional eye. Patching the good eye forces the amblyopic eye to function, thereby causing vision in that eye to be retained.[2][3] It is important to perform “near activities” (such as reading or handiwork) when patched, thereby exercising active, attentive vision.[5]