Paralysis or weakness of the muscles that control eye movements, and dilate and contract the pupil. If there is only mild weakness, the earliest symptom is double vision. If the muscles are actually paralyzed, it may be obvious to an observer that the eye does not move in certain directions.

Ophthalmoplegia can be produced by any condition affecting the muscles themselves or the nerves that supply them. Head injuries, stroke, meningitis, encephalitis, brain tumors, and diabetes mellitus are the usual causes. The condition also occurs in hyperthyroidism and myasthenia gravis. The treatment depends on the cause.

Log in or register to write something here or to contact authors.