Amblyopia, or "lazy eye," is a condition where one eye is weaker than the other. It can lead to misalignment of the eyes (inability to focus on the same object in space), as well as impaired vision in the weaker eye. Amblyopia is the most common cause of impaired vision in children.

A variety of treatment options are available for amblyopia sufferers of all ages, though young children tend to respond better to treatment than older patients