沙眼是我国学生中常见的传染性眼病，沙眼早期症状较轻．有限痒、烧灼感、异物感等不适。但发展到晚期，则可产生许多并发病，如眼睑白翻、倒睫。慢性泪囊炎、睑球粘琏、角膜混浊等，以至严重影响视力，妨碍人们的学习、工作和生活。因此，沙眼预防和早治是非常重要的。我们在 Trachoma is a common infectious eye disease in our students, early symptoms of trachoma light. Limited itch, burning, foreign body sensation and other discomfort. However, the development of late, it can produce many concurrent diseases, such as eyelid white turn, trichiasis. Chronic dacryocystitis, symblepharon, corneal opacity and so on, and even seriously affect the vision, hinder people’s learning, work and life. Therefore, trachoma prevention and early treatment is very important. we are at