Generally, according to the standard of curing strabismus surgery by domestic and foreign experts, the trigeminal degree of orthotropia or the presence of internal and external strabismus after surgery is not more than plus or minus 10△. In some children, the strabismus degree correction is very satisfactory when they are discharged from surgery, but after a period of time, parents will find that the child’s strabismus changes, and even some children with exotropia will have internal strabismus and some children with internal strabismus will have exotropia, what is going on? One, the child’s eye orthostasis is controlled by the extraocular muscles, the doctor surgery to correct strabismus is to correct the strabismus by adjusting the strength of the eye muscles. Some children have congenital abnormal development of the extraocular muscles or abnormal attachment position of the extraocular muscles, and the purpose of surgery is to correct the abnormal extraocular muscles to the normal attachment position. The above two abnormalities caused by strabismus can be solved through surgery. Some children’s strabismus is caused by problems with the central control ability of the brain on the eye muscles. Although the eyes can be corrected to the correct position after surgery, strabismus will occur again after a period of time due to poor central control ability and poor ability to control the convergence or separation of the child’s strabismus. Five, we let the child through the network training after the surgery is to prevent the child strabismus recurrence. But even after the training, some children will still have recurrence of strabismus. In general, intermittent exotropia and common exotropia are very likely to cause recurrence of exotropia after surgery, which we call the phenomenon of strabismus regression. Seven, the internal strabismus is easy to become exotropia after surgery, we call it strabismus overcorrection. The strabismus surgery for children at a very young age is not for aesthetic purposes or to achieve cosmetic effects, but to restore the child’s visual function (including stereopsis) to normal after the surgery. Due to early detection (after birth) or long duration of the disease (several years of strabismus), the child’s visual function does not develop normally, or the visual function of both eyes is severely damaged since childhood. These children are very prone to recurrence after surgery, and the visual function of both eyes is not easily restored. For the problem of recurrence after strabismus surgery, we have achieved good results with the three-step training of the network for hundreds of strabismus surgeries, which is: 1) post-surgical disinhibition training 2) fusion training 3) stereo visual function training.