原发性青光眼病人的眼A超测量

用美国ＪＥＤＭＥＤ公司生产的ＤＧＨ４０００型眼用Ａ超测量仪对１０２例原发性青光眼患者及４４例正常人的眼轴长度、前房中央深度、晶体厚度进行了测量。急性闭角型青光眼（急闭青）患者以上测量值（ｘ）分别为２２．２５ｍｍ，２．４２ｍｍ，５．０３ｍｍ；慢性闭角型青光眼（慢闭青）患者分别为２２．２８ｍｍ，２．５７ｍｍ，４．８７ｍｍ；慢性单纯型青光眼（慢单青）患者分别为２３．５９ｍｍ，３．４６ｍｍ，４．１０ｍｍ；正常人分别为２３．２２ｍｍ，３．４０ｍｍ，３．９８ｍｍ。同时计算了前房中央深度与眼轴长度比、晶体厚度与眼轴长度比、前房中央深度与晶体厚度比。发现急闭青与慢闭青患者的以上测量数值及相应比值与正常人之间差异有显著性（ｒ＜０．０１），而慢性单纯型青光眼患者与正常人比差异无显著性（Ｐ＞０．０５）。提示解剖因素在闭角型青光眼的发病原因中起主要作用，可建立自己实验的正常人和青光眼病人眼Ａ超测量的标准值，对提高青光眼的诊断水平有重要价值。

OCULAR A-SCAN MEASUREMENT OF PRIMARY GLAUCOMA

The axial length,center anterior chamber depth and lens thickness in 102 cases of primary glaucoma and 44 cases of normal subjects were measured with DGH 4000 ocular A-scan ultrasound made by JEDMED company.The measurement values(x)in the acute angle-closure glaucoma are 22.25mm,2.42mm and 5.03mm respectively;in chronic angle-closure glaucoma are 22.28mm,2.57mm and 4.87mm respectively;while in chronic simple glaucoma are 25.59mm,3.46mm and 4.10mm respectively and in the normal subjects are 23.22mm,3.40mm and 3.98mm.Meantime,the ratios of center anterior depth to axial length,lens thickness to axial length and center anterior chamber depth to lens thickness were calculated.The results show that there are significant differences between the angle-eclosure glaucoma and the normal subjects(P>0.05).These reveal that the anatomic features of eyeball play an important role in the causation of the angle-closure glaucoma.It is recommended that the ocular A-scan ultrasound is an important method for the glaucoma diagnosis.