病理原因分类　老年人视力下降可分为视力骤降及视力渐降 ,发生视力骤降时应高度重视 ,尽早到医院就诊。常见的引起视力骤降的疾病有如下几种 :1 .急性闭角型青光眼 ,以老年女性多见 ,患者可出现剧烈头痛、眼胀、恶心、呕吐及畏寒发热等症状 ,如不及时治疗 ,可因一次发作导致失 Pathological causes classification of vision loss in the elderly can be divided into visual acuity and visual acuity decreased, the occurrence of visual acuity should attach great importance to the hospital as soon as possible. A common cause of visual acuity in the following categories: 1. Acute angle-closure glaucoma, more common in older women, patients may have severe headache, eye swelling, nausea, vomiting and chills and fever and other symptoms, if not treated , Can lead to loss due to an attack