(corneal graft) n. an eye operation in which any diseased part of the cornea is replaced by clear corneal tissue from a donor. In penetrating keratoplasty all layers of the cornea are replaced, in lamellar keratoplasty only the superficial layers are replaced, and in Descemet’s stripping endothelial keratoplasty (DSEK) the endothelium only is replaced.... keratoplasty
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