What is graft rejection?
The immune system can sense that the new cornea (graft) is foreign tissue and try to destroy or ‘reject’ it. This happens in much the same way that the immune system fights infections. The white blood cells in the blood, lymph nodes and bone marrow are triggered to recognize the foreign tissue. These cell travel to the eye and attack the cornea. If this reaction is not stopped in time, the cornea can become cloudy and the vision becomes blurry. Fortunately, rejection reactions can almost always be stopped.
