Keratitis, commonly known as “black eye inflammation,” is characterized by eye redness, eye pain, photophobia, tearing, foreign body sensation, blurred vision, and whitening of the black eye. It is one of the most common blindness-causing eye diseases. It not only causes pain to the patient but also seriously affects the appearance. Common causes of keratitis: 1, infection: in China, the first keratitis blindness due to infection, mostly viruses, bacteria, fungi, echinococcosis, etc.. Often caused by fatigue, conjunctival foreign bodies, tree branch scratches, corneal contact lenses, etc. Jilin University First Hospital Ophthalmology Huang Rong 2, trauma: a variety of trauma caused by the destruction of corneal tissue structure leading to keratitis, such as corneal contusion, penetrating injury, cataract, biosurgery and other intraocular surgery damage to the cornea, so that the corneal endothelium loss of compensation. Acid-base and thermal burns of the eye lead to structural damage of the ocular surface, etc. 3, systemic diseases: rheumatoid, diabetes mellitus, dry eye syndrome, neurological diseases and other eye diseases affect or cause corneal lesions. Severe keratitis such as Pseudomonas aeruginosa infection is very dangerous, Pseudomonas aeruginosa is mostly present in soil and water, once infected, often within 24 hours or 48 hours to destroy the entire cornea and loss of the whole eye, while fungal infection is more often seen in eye trauma, especially after being damaged by crops, also seen in nail gouging and other nature of keratitis secondary to fungal infection, therefore, in addition to attention to eye personal hygiene in daily life, but also Therefore, in addition to eye hygiene, we should pay attention to labor protection in our daily life, and once eye trauma occurs, we must go to the hospital immediately and have it handled by professionals. Also avoid using unclean eye drops. Treatment of keratitis: Early treatment is emphasized, and etiological diagnosis is very important. If it is a viral infection, the application of more and better antibacterial agents will not be effective. For patients who do not respond to drug therapy or who have severe complications such as perforated corneal ulcers, prolapsed eye contents or secondary glaucoma, keratoplasty is an effective surgical treatment to save the eye.