Mine happened because the trocar popped out toward the end of surgery. I don't know how common that is or why it would have happened, but I believe the same thing happened to dammie...I don't know if he should have sutured after it popped out, I think the wound actually was leaking and I had hypotony toward the end of surgery because I saw a ring of black around my vision, large black splotches probably caused by the choroidals. Could he have inected more saline to bring the pressure back up and then stitch? Possibly, but he didn't realize I had hypotony at the time (even though I told him I was seeing the scotomas.)