These blood vessels are referred to as vascularization. A normal cornea has no blood vessels in it. If your cornea has little or no vascularization the risk of rejection is much lower than in a cornea with alot of vascularization. The blood vessels will allow your body's immune cells to flow to the new cornea which the immune cells may recognize as foreign and, then trigger a rejection reaction. The type of infection you had may also effect the possibility of rejection. The symptoms of rejection are redness, pain, and blurred vision
. Fortunately, if detected early a rejection reaction can often be suppressed with treatment , and the patient does well. Your ophthalmologist will be glad to discuss your concerns.