一般而言,诊断急性原发性青光眼是容易的,但当在角膜后表面出现和急性虹膜睫状体炎继发青光眼所出现的真性沉淀物相类似的假性沉淀物时,则需根据沉淀物的形态及分布情况而作鉴别诊断。在角膜后表面可出现两种沉淀物,即真性沉淀物和假性沉淀物。真性沉淀物是由房水内的细胞通过转运,沉淀在角膜后表面而产生,主要位于角膜下方,通常都呈圆形,常伴有房水闪光强阳性。假性沉淀物是由于高眼压引起角膜内皮的损害,内皮细胞崩解,局灶性坏死 In general, the diagnosis of acute primary glaucoma is easy, but when there is a pseudo-precipitate on the corneal posterior surface similar to that found in true glaucoma secondary to acute iridocyclitis, The shape and distribution of things for differential diagnosis. There are two types of precipitate that can appear on the corneal posterior surface: true and pseudo-sediment. Real sediment is produced by the cells within the aqueous humor transport, deposition in the corneal surface, mainly in the cornea, usually round, often accompanied by a strong flash of aqueous humor. Pseudo-sediment is due to intraocular hypertension caused by damage to the corneal endothelium, endothelial cell collapse, focal necrosis