Margarito got closer to Cotto in the last couple of rounds (even as he couldn't see) but Cotto seemed more willing to trade with him. It was as if Cotto felt Margarito's power and knew he wasn't going to get destroyed. Yes, after trading a few times in the last few rounds, Cotto went back to boxing (as that is still the smart thing to do). Fight was stopped at beginning of round 10. I think by end of round 11, Cotto would have started going onto the front foot and trying to really put a hurting on Margarito. I believe the eye being completely shut robbed him of that.