先天性眼震是一种常见的眼运动失调症。本病缺少视固定反射机能,当患者企图固定注视某静止物体时,眼球作快速水平摆动,使物体在眼底黄斑部不能成像,造成严重的视觉功能缺陷。本病原因不明,近来采用灵敏而准确的眼震电图 Congenital nystagmus is a common ocular movement disorder. The disease lacks fixed reflex function, when the patient attempts to fix a stationary object, the eye rapidly swings horizontally so that the object can not be imaged in the macula of the fundus, resulting in serious visual deficiencies. The cause of the disease is unknown, recent use of sensitive and accurate electronystagmus