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眼部碱性化学伤是临床上常见且严重的眼外伤之一，角膜移植手术基本上是其复明治疗的唯一手段．持续性角膜上皮缺损（PersistenCorncalFpithelialDefect，PCED）及角膜新生血管和假性胬肉的复发是造成手术失败的主要原因。近几年来，认为这些并发症的发生与角膜上皮干细胞的破
Eye alkaline chemical injury is one of the common and serious ocular trauma in clinical practice. Corneal transplantation is basically the only means of its treatment. Persistent corneal epithelial defect (PCED) and the recurrence of corneal neovascularization and pseudo-pterygium are the main causes of surgical failure. In recent years, these complications are considered to occur with the corneal epithelial stem cells broken