The degree of long-term success depends on a number of factors including the underlying cause of the cornea damage, surgical technique used, expertise of the surgeon, patient’s immune system acceptance of the donor transplant (organ rejection) and other factors Keep in mind that vision is usually blurred after surgery and will gradually improve over time. The length of time it takes to return to good vision depends on several factors, including the type of surgery performed. It may take up to 12 months for full vision to be achieved in patients who undergo full thickness tissue transplant. For endothelial transplants (DMEK and DSAEK), good vision is typically achieved within 3 months.