A retrospective study-report on 145 penetrating keratoplasty cases is presented. The donor tissue came from the United States, and the transplantation took place in Beirut, Lebanon, 50 to 72 hours after excision. The corneas belonged to donors 50 to 85 years of age. The preoperative vision in the recipient eye ranged from light perception to 20/100, and the postoperative vision in 83% of the cases ranged from 20/20 to 20/50. One can conclude that corneas more than 50 hours old and from elderly donors are dependable for use in penetrating keratoplasties.
Saleeby SS. KeratoplastyResults Using Donor Tissue Beyond 48 Hours. Arch Ophthalmol. 1972;87(5):538-539. doi:10.1001/archopht.1972.01000020540009