The severity of corneal ulcers and erosions is determined by the extent of the damage, with more superficial epithelial layers being repaired quickly and deeper perforations being more serious. The severity of corneal ulcers and erosions on various layers of the corneal epithelium due to various reasons such as infection and abrasion varies: if the corneal epithelium is only slightly abraded by a simple stone or an impaction, the corneal epithelium can be restored soon after the injury-causing factors are lifted due to the fast repair of the corneal epithelium. Corneal erosion ulcers are deeper in the cornea and injure the stroma, posterior elastic lamina and even perforation, which will not only affect the transparency of the cornea, but also damage the integrity of the whole eye, even blindness, and in serious cases, corneal transplantation is needed. It is recommended that the corneal damage to the erosion of timely medical treatment, improve the slit lamp microscope corneal scraping film and other auxiliary examination for the cause of the treatment.