Corneal TransplantationTransplantation, HomologousGraft RejectionGraft SurvivalCorneaKeratoplasty, PenetratingEndothelium, CornealEye BanksConjunctivitis, AllergicDescemet Stripping Endothelial KeratoplastyTissue DonorsFetal Tissue TransplantationEpikeratophakiaBrain Tissue TransplantationIsoantigensTissue PreservationAllograftsCorneal NeovascularizationAmbrosiaHypersensitivity, DelayedAnterior ChamberCorneal DiseasesMice, Inbred BALB CKidney TransplantationMice, Inbred C57BLLymphocyte Culture Test, MixedRats, Inbred LewLiving DonorsBlood DonorsHeart TransplantationTransplantation, HeterologousMice, Inbred C3HAdministration, TopicalEnzyme-Linked Immunosorbent AssayT-LymphocytesPollenSkin TransplantationFas Ligand ProteinCD8-Positive T-LymphocytesT-Lymphocytes, RegulatoryFlow CytometryCD4-Positive T-Lymphocytes