Fig. 7. Tying a releasable suture. The releasable knot is tied by placing three or four throws around a needle-holder of the suture end that extends from A to 1. The forceps around which those throws have been passed then grasps loop B. The end A is then pulled towards the cornea, and loop B is pulled posteriorly away from the cornea, creating a slip knot. Loop B should be approximately 1 to 4 mm long. The end C is then very gently pulled so that the loop between 4 and 5 becomes flush with the cornea. The end of the suture exiting the cornea is cut with a Vannas scissors, and the end of the suture knot tied over the incision is gently cut with the Vannas scissors to make sure that the slip knot is not disrupted by the ends being pulled at the time of the suture cutting.