There are many diseases that cause epidermal shedding on the black eye, which can be seen in corneal injury caused by trauma, or it can be a symptomatic manifestation of a certain disease, such as purulent keratitis, conjunctivitis and so on. 1. Corneal injury: the black eye refers to the part of the cornea, when iron filings, hot oil, strong alkali and so on enter the eye and cause damage to the cornea, it may lead to the phenomenon of epidermal detachment. 2. Purulent keratitis: it is a kind of purulent eye disease caused by bacteria, fungi and other infections. The main symptoms can be seen as eye pain, photophobia and tearing, vision loss, and thin lipid covering on the cornea. If left untreated, it may cause perforation of the cornea, leading to dislodgment of the contents. 3. Conjunctivitis: It is an inflammatory disease that occurs in the conjunctival tissues and can be caused by infection, immune diseases and other factors. The main symptoms are redness, dryness, itchy eyes, excessive secretion, tearing, etc., which may be accompanied by epidermal detachment if it affects the cornea. If there is epidermal detachment on the black eye, you should go to the hospital immediately, complete the relevant examination, clarify the cause of the disease, and actively cooperate with the doctor’s treatment.