Before revision: The two corneal layers which are exchanged are the Descemets membrane and the endothelial URL The patient's corneal tissue is gently excised and replaced with the donor tissue via small 'clear corneal incisions' (small corneal incisions just anterior to the limbus.
After revision: The two corneal layers which are exchanged are the Descemet's membrane and the cornealcorneal URL The patient's corneal tissue is gently excised and replaced with the donor tissue via small 'clear corneal incisions' (small corneal incisions just anterior to the limbus.