Methods The axial lengths of affected and fellow eyes of 16 patients with CRVO and 19 with BRVO and of their controls were measured with A-scan ultrasonography.

• 方法应用A型超声仪对16例中央静脉阻塞(CRVO)和19例分枝静脉阻塞(BRVO)眼轴进行测量,两对照组分别同两病例组年龄和性别相配,例数相等。