Keratitis is the most common ophthalmic disease in ophthalmologic clinics, mostly due to inflammation of the cornea caused by pathogenic infection, which is most commonly seen in fungal, viral, bacterial and other pathogenic infections of keratitis, and its incubation period is not the same. The incubation period of fungal keratitis is relatively short, about 1 week. Fungal keratitis is mainly caused by fungal infections, and patients experience itching, redness, swelling, and congestion in the corneal area. It is necessary to use antifungal drugs for treatment, and at the same time pay attention to eye hygiene and protection work, it is very helpful to the recovery of keratitis. The incubation period for viral and bacterial varies in length and will usually be 3-15 days. Bacterial or viral keratitis should be diagnosed by ophthalmology and treated with appropriate antiviral and antibacterial eye drops.