Ophthalmoplegia is a medical term used to describe paralysis or weakness in the muscles that control eye movements. Synonyms for ophthalmoplegia include eye paralysis, eye muscle weakness, and extraocular muscle paresis. Other synonyms include strabismus, diplopia, and nystagmus, which are all conditions that affect the movement or coordination of the eyes. Ophthalmoparesis, which is a less severe form of ophthalmoplegia, is another synonym that refers to partial paralysis of the eye muscles. These conditions can be caused by a variety of factors, including neurological disorders, autoimmune diseases, infections, or trauma to the eye or head.