Friends: The cornea is a colorless, clear tissue on the surface of the eye, about 1 mm thick, and is located at the front of the eye, making it vulnerable to infection and trauma. Corneal disease causes the transparent cornea to appear grayish-white and cloudy, blocking light from entering the eye, which can lead to blurred vision and even blindness, and some corneal lesions can only be treated by corneal transplantation. In China, infection and trauma are the main causes of blindness due to keratoconus. It is especially noteworthy that in recent years, corneal contact lenses (contact lenses) and related products have been widely used, and the number of corneal blindness patients is increasing. According to a national sample survey of people with disabilities, there are about 4 million people in China who are blind due to keratoconus (including monocular patients), and about 70% of these patients are young adults and 15% are children. Early stages of keratoconus can be cured if treated promptly and accurately. When the lesions are severe or recurrent, such as drug treatment is ineffective, leaving a thick scar on the cornea or the occurrence of eye penetration, the only treatment option at this time is to perform corneal transplantation to remove the clouded cornea and replace it with a clear cornea, so that patients can regain their vision. This is like a camera with a rough lens that can be replaced with a new clear lens to produce a clear picture. Corneal transplantation works well Corneal transplantation is a procedure that removes diseased corneal tissue and replaces it with a clear, functioning cornea. Depending on the location of the corneal lesion, if it is in the center, then only the central part is replaced; if it is located at the edge of the cornea, then replacing the cornea with the edge lesion is sufficient. With the development of science and technology, corneal transplantation has become a very successful transplantation surgery, its surgical effect is the best among all organs transplantation, the incidence of postoperative rejection is lower than other organs transplantation, for some patients with better corneal conditions, the success rate of corneal transplantation reaches more than 90%, most patients with corneal blindness can restore useful vision through corneal transplantation. Indications for corneal transplantation: corneal infection or trauma that causes the cornea to become cloudy from transparent, affecting vision, corneal leukoplakia, cone cornea, glaucoma or cataract IOL surgery caused by corneal endothelial loss of compensation, herpetic keratopathy, corneal dystrophy, corneal degeneration, etc. 1, recurrent viral keratitis caused by corneal clouding, after complete healing and within six months without recurrence of patients, can consider transplantation of cornea; 2, acid, alkali chemical burns of corneal clouding patients, in about six months of injury healing, can do corneal transplantation; 3, corneal ulcers range, deeper invasion, long-term treatment, the risk of perforation or to the central invasion of nibbling corneal ulcers when immediately Corneal transplantation; 4, congenital corneal degeneration, cone cornea and other patients, should also be immediately corneal transplantation; 5, patients with corneal scars caused by eye trauma, in order to make the eye function better, can also be considered for corneal transplantation. 6, fungal keratitis drug treatment is ineffective, there is a risk of eye perforation should be early corneal transplantation.