I got back from the hospital this morning, and it's good news!
The operation was a success and that pesky little hole has closed!
I'm now just waiting for the gas bubble to deflate, (the doctor says it it's deflating quite quickly so will probably be gone in 2 - 3 weeks), and then I'll be back to something approaching normal vision again
If anyone's interested in what the world looks like when you have a vitrectomy gas bubble, this is a fair approximation. (The lower bubble area is a little darker and more domed than what is shown here), but now that the bubble is shrinking, this is roughly what the vision in my right eye is like!
Because looking through the gas bubble is like looking through water, that part of my field of vision is blurry and refracted like everything is bigger or further away, and I've walked into doorframes a couple of times! It wouuld be just my luck to end up back in the hospital with a broken toe!!!