运用模拟眼科手术基础型斜视模型眼来演示如何在直肌上制作蝴蝶结可调节缝线，并演示如何松开缝线，然后将肌肉向前或向后移动。
除了Cybersight 的图书馆以外，您还可以在这里找到各种模拟手术视频，展示了使用不同类型的模拟技术来进行各种眼科手术的技巧。
Transcript
中文版字幕附于视频下方，英文原版字幕如下：
0:11
In this clip, we’re going to illustrate a lateral rectus recession, using an adjustable suture technique. There are many different techniques. Here, we’re going to use a bowknot technique, as opposed to the sliding noose technique.
One of the things that the eyes are extremely useful for is allowing the trainee to practice making relatively long scleral passes with confidence.
With adjustable squint surgery, I like to ensure the muscle is as well spread as possible, and by creating these long passes, it enables me to do this. Some people use a crossed-swords technique.
Having placed the sutures. I’m just advancing the muscle up towards the equator. Then we’ll cut the stitches and fashion that bowknot. I would emphasize: It doesn’t matter which technique you’re using, as long as the trainee receives appropriate instruction before practicing by themselves.
So a double throw at this point. Then advancing the muscle to the desired recessed position. And then creating a little bowknot, like so. I tend to cut this suture short. This will be the one that I pull to release the knot. The other one, slightly longer.
Now to practice advancing the muscle. Just pull on the shortened suture. We teach the trainee to hold the sutures close to the original knot, so we get a degree of purchase on it. You can see there’s a reasonable degree of resistance to advancing the muscle, as it would do in real life. This is because the elastic band underneath the cap is making it slightly difficult to move the muscle forward. And we’ve just retied the knot.
I’m going to illustrate here how the lateral rectus can be recessed further. Again, undoing the bowknot. Then advancing the suture slightly off the sclera, so the St. Martin’s forceps can be placed underneath the suture, and that knot opened up.
It’s harder to grip the basic eye than the advanced eye. And certainly more difficult than it’s in real life. We’re getting the patient, if you like, to look to their left, abduct the eye by pulling on the lateral rectus, and securing the globe with the right hand. The muscle is recessed further. The double throw is again secured. Orientating the suture correctly and the bowknot retied.