1病例资料病例1,男,69岁,因“视物不清17 h”于2016年1月2日收住我院神经内科。入院17 h前于散步时突发视物不清,双眼视物成双,单眼视物时正常。不伴有吞咽困难、饮水呛咳及肢体无力。既往高血压病史30余年,糖尿病史10年,吸烟史30余 1 Case Information Case 1, male, 69 years old, due to “blurred vision 17h ” on January 2, 2016 admitted to our hospital neurology. 17h before admission sudden onset of ambiguity when walking, binocular vision into double, monocular as normal. Not accompanied by difficulty swallowing, coughing and limb weakness. Past history of hypertension more than 30 years, 10 years history of diabetes, smoking history more than 30