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Cornea transplants are very successful. When you think about it, it is the most widely done tissue transplants out there and patients are not required to take systemic anti-rejection medications. They are just required to take drops. Usually cornea transplants do very well. It does take time for the patient to achieve their best vision. It can take up to a year because the patient has stitches in their eye that do need to be removed eventually. During the cornea transplants, the diseased tissue is cut and removed, which leaves the eye open and then the donor tissue is replaced over this and sewn in place with several stitches. Using the femtosecond laser, you can cut the tissue in a more precise fashion, which creates a better seal. It reduces your chances of having a rejection and it is also improves your chances of the cornea graft being an optical system in getting better vision. There is the endothelial cell transplant, which removes only the diseased portion of the inner cornea, the inner layer, and it is replaced with the donor tissue. It is a less involved procedure and therefore has better results.