If the esotropia has been corrected completely, then there is no need to have strabismus surgery. If you wear glasses to correct your esotropia for over 6 months and the esotropia is only reduced, the remaining strabismus should be treated by surgery as early as possible.
Children who have exotropia shoulld have strabismus surgery as early as possible. The best time to take strabismus surgery for exotropia is between 4-6. So if you get strabismus, you should consult your doctor whether you can have strabismus surgery and when to have surgery.