hello,my name is leisha long my son had eye muscle suregery on july 10 2015. and right after surgery my son was saying he can not see at all he is 4& half years old. and we took him back for his post op apt on july 20, 2015 and she said he has optical nerve damage! how did this happen during the surgery? please help me because this is driving my family and I crazy. because the dr that did this surgery keeps saying she don't know how that happened on same day of the surgery optical nerve damage. and when i took him to see her on august 25, 2015 she said they were still swollen! and as of right now my son is blind!