My little boy had the surgery when he was 4-At first, the difference was only mild, but over time (post surgery) his strabismus has improved to the point that it is almost not noticeable. For some reason, it occasionally shows up in pictures (??) but generally, you couldn't tell unless you were looking for it.
Post surgery, we had a rough time for about one day with discomfort-he was only 4, so it was hard to explain to him what was going on-and at that age, its hard to tell them that they need to just lie down and rest their eyes. He thought we were sending him on a day-long NAP! Oh, HORRORS!!!!
By the second day, he was fine and functioning normally-it was a really simple procedure, fast recovery.