In reply to mypyrex:
Yes, lots unfortunately - 2 retinal detachments with vitrectomy; 1 retinal reattachment; 2 cataracts.
Presumably you're having it under local? In which case...
Some anaesthetic drops get put in. Then you'll be asked to look up and to one corner of the room whilst the main injection is put in. To be honest this is the only unpleasant bit - a sensation of strong pressure behind the eye. Lasts a few seconds.
After that the vision is totally blurred (no you can't see anything that's going on.
You lie on your back with your head in a rubber cup (quite comfortable). The eye is immobile and eyelids retracted.
You'll hear them talking and perhaps feel some fluid run down your cheek as they keep it irrigated, but feel nothing - maybe some scratches towards the end of the procedure if you metabolise block fast. Say so and they can top up if needed.
You'll be back out very fast - cataract 20'; yours only a little longer.