Clinical results after single asymmetrical shark fin for graft orientation in DMEK

Purpose Evaluating the effect of a single peripheral triangular mark to ensure the correct anterior–posterior graft orientation in DMEK. Methods Retrospective study of patients scheduled for DMEK due to Fuchs endothelial dystrophy and divided into 2 study groups: Group −M ( n = 184) had no mark of the EDM (Endothelial Descemet membrane) and group + M ( n = 193) had a triangular peripheral mark. Follow-up time was 1 year after surgery. Results The postoperative graft turning and Re-DMEK rate could be significantly reduced by the use of a peripheral mark ( p = 0.002, p = 0.001, respectively). Re-DMEK due to primary graft failure was significantly associated with prior graft turning ( p