viral keratitis

例句：

1. 1. The patient had a history of viral keratitis, which required immediate treatment.
   患者有病毒性角膜炎的历史，需要立即治疗。
2. 2. Viral keratitis is a common cause of corneal ulcers in young children.
   病毒性角膜炎是年轻儿童角膜溃疡的常见原因。
3. 3. Early diagnosis and treatment of viral keratitis can significantly reduce the risk of complications.
   早期诊断和治疗病毒性角膜炎可以显著降低并发症的风险。