Introduction
Millions of people worldwide are blind from corneal
disease or damage (Thylefors et al., 1995). Although
corneal transplantation and Descemet’s stripping
endothelial keratoplasty (DSEK) have a high success rate
(Lee et al., 2009), the shortage of donor corneas remains
a problem. Moreover, successful human corneal allografts
not only depend upon the availability of donor corneas
but also are detrimentally affected by aggressive immune
responses.