Corneal ulcers are localized tissue ulcers and defects in the black part of the eye, which can be caused by a variety of reasons, and the treatment of corneal ulcers caused by different reasons is different: First, the most common cause of corneal ulcers due to infectious factors, the principle of treatment is to order antibiotic drops as soon as possible to control the infection, bacterial infectious corneal ulcers can use levofloxacin hydrochloride eye drops, viral infections caused by The corneal ulcer of bacterial infection can use levofloxacin hydrochloride eye drops, viral infection can use acyclovir eye drops, and fungal corneal ulcer can use natamycin eye drops. Second, ulcers caused by exposure keratitis, caused by thyroid-associated eye disease, orbital tumors causing protrusion of the eye, or orbicularis oculi muscle paralysis causing incomplete closure of the lid, and dryness of the cornea after prolonged exposure to air, can be treated with drugs that promote epithelial repair, such as recombinant human epidermal growth factor eye drops.