The cornea is the most anterior convex and highly transparent membrane of the eye, is transparent and non-vascular, but has abundant and very sensitive nerve endings, is located at the forefront of the eye, is in direct contact with the outside world, and is susceptible to inflammation and even ulceration due to damage from microorganisms, trauma and physical and chemical irritants. Corneal ulcers are more serious corneal lesions caused by various bacterial or viral infections, mainly manifesting as eye pain, foreign body sensation, photophobia, lacrimation, and vision loss. Treatment is needed to address the cause, actively control the infection, promote healing, and reduce scar formation. Anti-infective medications are mostly used, and surgical treatment is feasible if necessary. For bacterial infections, antibiotic eye drops and antibiotic eye ointment should be applied to the eyes before bedtime; for viral infections, antiviral eye drops should be applied to the eyes. Also take vitamin C and B vitamins orally to help the ulcer heal. If medication is ineffective, corneal ulcers are perforated, and if the scar formed after the ulcer heals seriously affects vision, corneal transplantation can be performed. Therefore, the treatment of corneal ulcers varies depending on the cause and severity of the disease.