It is a safer technique: because the patient’s Descemet and endothelium cell layer remain intact: there is less chance of astigmatism because both layers form the support layer for the donor tissue; there is also less danger of rejection and more chance that the graft remains transparent. The eye remains stronger.
there is faster visual repair with more chance of visual recovery to 10/10
greater predictability of the refractive outcome
the eye remains closed: less chance of infection and short- and long-term complications that jeopardise sight and that can arise after the PKP procedure (e. g. intra-operative expulsive bleeding or post-operative traumatic wound rupture).