Figure 4. Survival of First Transplants and Regrafts for Pseudophakic Bullous Keratopathy (PBK) According to Number of Grafts in the Same Eye.

A, Five-year survival of the first, second, and third grafts after penetrating keratopathy (PK). B, Survival of the first, second, and third grafts after endothelial keratoplasty (EK). C, Survival of groups in which primary and regrafts were performed by PK or EK. D, Survival of first regrafts for the 4 permutations of primary and regraft procedures (eg, PK followed by PK [PK-PK]).