1. NO. Your concept of how retinal detachment surgery is done is flawed. a eye muscle specialist is not part of the retina surgery repair. Some times the muscles have to be manipulated to put a buckle around the eye and sometimes freezing treatment has to be done over a muscle. Consequently double vision is very common after RD surgery. At other times the eye drifts because it doesn't see well and that is like having a boat without a rudder.
2. There are two problems: trying to get the eye to see better and getting the eyes straight. The first is the most important. He should ask the retina surgeons advise on when it would be appropriate to see a strabismus (eye muscle) surgeon.
3. No, even if there was if he saw better he would likely have constant double vision.
JCH III MD
The doctor will advise you.