眼睛是人体的外露器官，除了人在睡眠时以外，时时都与空气“亲密”接触着。尽管空气中有各种各样的微生物，但因眼睛的防线完好，一般不会引起炎症。只有当异物进入眼睛，划伤结膜上皮、角膜上皮或结膜囊，微生物才会趁虚而入。实际上，日常生活中出现的眼干、眼痒等症状并非 The eyes are exposed organs of the human body, in addition to people outside of sleep, all the time with the air “intimate” contact. Although there are a variety of microorganisms in the air, the eye’s defenses are generally intact and generally do not cause inflammation. Only when foreign body into the eyes, scratch the conjunctival epithelium, corneal epithelial or conjunctival sac, microbes will take advantage of. In fact, the symptoms of dry eye, itchy eyes, etc. appearing in daily life are not