埃塞俄比亚的一项研究表明,整个乡村居民一年用药治疗2次,可以阻抑发展中国家中数百万人因患沙眼而失明.细菌性眼病沙眼于20世纪中叶在美国与工业化国家已得以消灭,这是改善环境卫生、卫生保健与抗生素的功劳.但是在非洲和亚洲部分国家中仍然流行.沙眼经常开始于微痒,称为红眼( A study in Ethiopia shows that treatment of the entire rural population twice a year twice a year can prevent blindness in millions of people in developing countries due to trachoma.The bacterial eye disease has been eradicated in the United States and industrialized countries by the mid-20th century, This is a credit to improving sanitation, healthcare and antibiotics, but is still prevalent in parts of Africa and Asia. Trachoma often starts with micro-itch, called red-eye