| Corneal perforation, n (%) | Graft rejection, n (%) | Primary graft failure, n (%) | Graft detachment, n (%) |
Group 1 (n = 37) | 1 (2.7) | 1 (2.8) | 1 (2.7) | 1 (2.7) |
Group 2 (n = 36) | 0 (0) | 1 (2.8) | 2 (5.6) | 1 (2.8) |
Group 3 (n = 39) | 0 (0) | 2 (5.1) | 2 (5.1) | 2 (5.1) |
Total | 1 (0.9) | 4 (3.6) | 5 (4.5) | 4 (3.6) |