The good news is the gas bubble (with its edge of blood) has gone now. The bad news is that I seem to now have "fourth nerve palsy" which means my left eye doesn't point the same way as my right.
This means I see two images, and as my left eye vision improves the second image is getting stronger. The doc thinks it might have been pre-existimng but that my brain always compensated for it - but now we just have to wait to see if that is the case.
If not it is either glasses with a prism effect or surgery to remove a bit of muscle. What fun?