how old is your son? I did the operation when I was six at Baptist, well, that's 2X years ago. and I also have 200幾度散光. Better to do the operation. My doctor is too old to refer to you, but just want to assure you that except散光 and "short sight", I have nothing wrong in my eye until now.
No worry. Oh and the scar is not obvious. No one aware of that even I wear contact lens.