Graft Survival After Penetrating and Endothelial Keratoplasty in Iridocorneal Endothelial Syndrome.

PURPOSE

To compare the survival of a first penetrating keratoplasty (PK) or endothelial keratoplasty (EK) for iridocorneal endothelial (ICE) syndrome with transplant survival in Fuchs endothelial dystrophy (FED) and pseudophakic bullous keratopathy (PBK).

METHODS

We compared graft survival of PK and EK for ICE syndrome for 2 time periods. We then compared graft survival in ICE syndrome with graft survival in FED and PBK. Kaplan-Meier estimates of graft survival up to 5 years posttransplant were calculated with 95% confidence intervals (CI), whereas comparisons between the groups were performed using the log-rank test.

RESULTS

We included 86 first transplants for ICE syndrome. There was no difference in graft survival between the 58 PKs and the 28 EKs for up to 5 years after surgery (P = 0.717). For the period from 2009 to 2017, the 5-year graft survival rates for ICE syndrome were 64.3% (CI, 21.8%-88.0%) for the 16 PKs and 66.8% (CI, 41.8%-83.0%) for the 26 EKs (P = 0.469). Between 2009 and 2017, the 5-year survival rate for 42 grafts with ICE syndrome was 62.7% (CI, 39.6%-79.0%), which was lower than 75.9% (CI, 74.2%-77.4%) in 7058 transplants for FED but higher than 55.1% (CI, 52.0%-58.0%) in 3320 transplants for PBK, although the numbers of ICE transplants are too small to tell whether this difference was by chance.

CONCLUSIONS

The results indicate no difference in graft survival between PK and EK for ICE syndrome. Graft survival in ICE syndrome is intermediate between that of FED and PBK.