This procedure preserves over 95% of the patient’s cornea, as it replaces only the inner lining cells (known as endothelial).  These cells are responsible for keeping the cornea clear and, when they malfunction or are lost, cloudiness develops because of excessive retained fluid. 

The patient’s endothelial cells are removed by peeling off the membrane upon which they sit (Descemet’s membrane).  The donor cornea is shaved until a thin inner portion remains, which includes Descemet’s and the endothelial cells.  This disc of tissue is folded and inserted into the eye, then is kept in place with an air bubble.  No sutures are used to hold the transplant, as the pumping action of the endothelial cells should cause the tissue to “stick” in place.