“…A and B antigens were demon-strated in human corneae by Nelken ct ul. (1956,1957), Nemelz (1958), and Sabnis d% Basu (1963); Klen (1955) and Nelken et al (1957) reported that a rise in the iso-agglutinin titre occurred after ABO-incompatible transplantations. I n contrast to these experimental studies, the reports on the importance of ABO compatibility for the clinical results of corneal transplantations are rather controversial (Hauencr et al 1958, Mehri et al 1959, Votockova & Karel 1962, Richter 1965.…”