To compare the clinical application of ultrasound biomicroscopy between chronic angle closure glaucoma(CACG)and primary open angle glaucoma(POAG).

• 目的 :比较超声生物显微镜 (ultrasound biomicroscopy,UBM)检查下慢性闭角型青光眼与原发性开角型青光眼眼前节各项指标的差异 ,探讨 UBM在鉴别此两种类型青光眼的作用。