唐某,男,18岁。因双眼睑不能上举、眼球不能转动9年就诊。8岁前双眼正常,以后在无任何原因出现双眼上睑下垂,眼球活动不灵活,逐渐加重。但能胜任一般体力劳动,无易疲劳及呼吸,吞咽困难现象。父母非近亲结婚,三代家族中无同样病史。眼部检查:视力双眼远近视力均1.5,平视时双上睑缘遮挡瞳孔区上1/2,阻断额肌力后,两上睑运动幅度为 Tangmou, male, 18 years old. Due to double eyelid can not be on the move, the eye can not turn 9 years treatment. Before the age of 8, his eyes were normal, after the absence of any reason, his eyes ptosis, eye movement is not flexible, and gradually increased. But capable of general manual labor, no fatigue and breathing, swallowing difficult phenomenon. Parents of non-relatives married, three generations of the same family history. Eye examination: visual acuity both eyes far and near visual acuity was 1.5, when the double lid on the upper eyelid occlusion on the pupil area 1/2, after blocking the amount of muscle strength, the two upper eyelid motion amplitude