非动脉炎性前部缺血性视神经病变(nonarteritic anteri-or ischemic optic neuropathy,NAION)是中老年人群中最常见的急性视神经病变,以突然视力下降,特征性视野缺损,视乳头水肿或伴周围神经纤维层出血为主要临床表现,常双眼先后发病。该病的年发病率据统计在50岁以上的人群中 Nonarteritic anteri-or ischemic optic neuropathy (NAION) is the most common acute optic neuropathy in the middle-aged and elderly population, with sudden loss of vision, characteristic visual field defects, papilledema, Nerve fiber layer bleeding as the main clinical manifestations, often have the eyes of the disease. The annual incidence of the disease according to statistics in people over the age of 50