The term amblyopia literally means “dullness of vision.”
It is defined as “a decrease of visual acuity in one eye when caused by abnormal binocular interaction or occurring in one or both eyes as a result of pattern vision deprivation ... for which no cause can be detected during the physical examination of the eye(s) and which in appropriate cases is reversible by therapeutic measures.” The three main causes of amblyopia are strabismus, anisometropia and stimulus deprivation. Amblyopia onset is usually in childhood. Occlusion therapy works on the principle that