Amblyopia, otherwise known as lazy eye, is a disorder of the visual system that is characterized by poor or lack of vision in an eye that is otherwise physically normal, or out of proportion to associated structural abnormalities. It has been estimated to affect 1–5% of the population. Amblyopia means that visual stimulation either fails to transmit or is poorly transmitted through the optic nerve to the brain for a continuous period of time. It often occurs during early childhood, resulting in poor or dim vision. Amblyopia normally affects only one eye, but it is possible to be amblyopic in both eyes if both fail to receive good, clear visual images...