Hi, M. --
It's been a while since you posted, but I figured I would add my little bit of info.
When I was about 5, I was diagnosed with Strabismus... I'd been having headaches in school and while reading, and it's because I had two lazy eyes.
They decided that surgery would be the best option for me, and they proceeded with it when I was maybe 5 1/2. This was 1976, so you can only imagine that the technology for this stuff has improved about a thousandfold since then!!
Anyway, the results of my surgery were phenomenal. My eyes are nice and straight, and, to the huge surprise of every single opthamologist and optometrist I've seen since then, I have the kind of depth perceptions and ability to cross my eyes and do whatever other little eye tricks they ask you to do in a standard appointment... apparently, these abilities are somewhat rare for someone who'd been operated on for strabismus.
The surgery was not the most fun thing I've ever done, but it was definitely not the worst, either. I remember some eye pain - not a lot, and I think I was discharged the same day. I do recall being a little nauseus coming out of anesthesia, and I did see double for a few days. In any case, it wasn't horrible, just more or less inconvenient.
Then we patched my eyes for some time, and then, voila! I was fixed! :)!
So, as a mom, I can imagine the sheer terror of the thought of having any kind of surgery done for your child! I get terrified when my daughter has a bad coughing spell! But, as the recipient of a surgery that did a world of wonders for my eye alignment, I can definitely say I am thankful that my parents were fearless and never let on that they were in any way worried.
I wish you strength to help you if the decision is that surgery is necessary, and I want to reassure you that he will thank you for it when he's grown up!
Take care,
H.