Tissue DonorsDeltaretrovirus InfectionsDeltaretrovirus AntibodiesCorneaNucleic Acid Amplification TechniquesBlood DonorsLiving DonorsCorneal StromaEpithelium, CornealEndothelium, CornealKeratitisKeratoconusCorneal OpacityEye BurnsKeratoplasty, PenetratingCorneal NeovascularizationCorneal UlcerEye BanksCorneal EdemaDescemet MembraneOphthalmic NerveCorneal KeratocytesRabbitsCorneal TopographyTime FactorsTreatment OutcomeTissue PreservationKeratitis, HerpeticLimbus CorneaeGraft SurvivalLasers, ExcimerWound HealingConjunctivaKeratan SulfateTransplantation, HomologousTissue and Organ ProcurementRetrospective StudiesPhotorefractive KeratectomyPostoperative ComplicationsFluorescent Antibody Technique, IndirectSodium HydroxideFuchs' Endothelial DystrophyCorneal Dystrophies, HereditaryEye InjuriesOphthalmic SolutionsOrgan Preservation