Has anyone here ever heard of a corneal transplant that worked?

Yes: Corneal transplants are fairly routine and have been performed for literally over 100 years. Techniques have changed and there are a variety of types of corneal transplants but fortunately outcomes are good.

Yes: Corneal transplants do very well in general. They usually have very little rejection. It will depend on the cause of corneal damage. Keratoconus cases for example, rarely reject. Some burns or trauma cause ingrowth of blood vessels, are are more susceptible to rejection.

Corneal transplant: Corneal transplantation is the most successful tissue transplanted with success rates as high as 95% depending on the reason for surgery.