“As a caveat, the Boston KPro series includes eyes with all indications, not just failed PK, and that might mitigate for better results with the Boston KPro,” Dr. Tan said.
More relevant information may come from a systematic review and meta-analysis of the Boston Kpro versus repeat donor keratoplasty for corneal graft failure.
In this study, the probability of maintaining 20/200 or better visual acuity at 2 years was 42% in the PK group and 80% for the Boston KPro. At 5 years, 47% of eyes having repeat PK had a clear graft whereas the Boston KPro retention rate was 75%.
“These data indicate that survival with the Boston KPro is better than with repeat PK and similar to DSAEK, but still we need to see what happens with longer follow-up.