Prognosis for Corneal Transplantation The chance of long-term transplant success is > 90% for keratoconus, traumatic corneal scars, early bullous keratopathy, or hereditary corneal stromal dystrophies 80 to 90% for more advanced bullous keratopathy or inactive viral keratitis 50% for active corneal infection 0 to 50% for chemical or radiation injury Use of a rigid corneal lens can result in earlier and better vision for many patients who have had penetrating keratoplasty.