title: Paired donor eyes in penetrating keratoplasty.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D002675:Child, Preschool; D016039:Corneal Transplantation; D005069:Evaluation Studies as Topic; D005500:Follow-Up Studies; D005615:Freezing; D006084:Graft Rejection; D006801:Humans; D007223:Infant; D008875:Middle Aged; D009026:Mortality; D012034:Refrigeration; D012189:Retrospective Studies; D013997:Time Factors; D014019:Tissue Donors; D014021:Tissue Preservation; D014184:Transplantation, Homologous