目的：探讨圆锥角膜急性水肿的眼前节OCT影像学特征，分析角膜水肿发生发展的原因。 方法：收集8例急性角膜水肿的圆锥角膜患者，行常规眼部检查及眼前节OCT检查。 结果：角膜基质层内形成一裂隙与前房相沟通。角膜基质层的厚度在发生裂隙的部位十分菲薄，甚至穿孔，发生虹膜组织嵌顿。 结论：角膜基质层裂隙的形成可能是导致急性角膜水肿的一个重要原因，裂隙还可能导致持续的水肿及后弹力层的延迟愈合，严重者甚至造成角膜穿孔。

AIM:To investigate the features of acute hydrops in patients with keratoconus by anterior segment OCT. METHODS: Eight consecutive keratoconic eyes of 8 patients with acute hydrops were examined by anterior segment OCT. RESULTS:Anterior segment OCT examinations revealed a rupture of Descemets membrane and intrastromal clefts in all eyes. The intrastromal clefts were connected to the anterior chamber. CONCLUSION:Formation of intrastromal clefts may be an important factor in the development of acute hydrops in keratoconic eyes. The clefts may cause severe corneal edema and delay the closure of Descemets membrane during the resolution of corneal edema.