周期性动眼神经麻痹是罕见的眼球运动障碍,它是第三颅神经交替出现痉挛及麻痹期。当麻痹期时眼睑下垂,瞳孔扩大,对光反应消失,及眼球向下外。以后眼睑出现抽搐动作是痉挛期开始的信号,此时眼睑睁开、眼球回复至正中,瞳 Cyclical oculomotor palsy is a rare eye movement disorder, it is the third cranial nerve alternating spasm and paralysis. When paralysis drooping eyelid, dilated pupils, the response to light disappeared, and the eye down outside. Eyelid twitching after the action is the beginning of the signal spasm, when the eyelids opened, the eye returned to the center, the pupil