We examined both a parallel and a cross technique in comparison with operations not using block suture. Of the 44 eyes that underwent surgery without block suture, aqueous leakage occurred in 4 eyes (9.0%). Of 51 eyes that underwent the parallel technique, 1 eye (2.0%) leaked from the limbus incision. In contrast, leaks were not detected in any of the 58 eyes that underwent the cross technique.