... And is also the best!
I tore, and detatched the retina of my right eye. From first symptoms to op it was literally a week, but in managing that I maintained most of my sight. I was actually blind in the eye for a few hours, but since then have been able to see again.
It was a 3 hour op, and has left me with visible scars on my eye ... although I don't suppose those who have met me have seen them. But on a couple of times I have had people notice them.
So a long and major op ... but saving my sight.