Strabismus, also known as crossed eyes, amblyopia, or lazy eye, is the misalignment or pointing in different directions of the eyes. It results from the weakness of the eye muscles. It occurs in one or both eyes. Family history is a leading cause of strabismus despite of many different causes such as severe head trauma. For strabismus, there are several treatment choices such as eyeglasses or contact lenses, eye drops, surgery and covering the better-seeing eye.