The timing of surgery for several common strabismus 1, congenital internal and external strabismus and superior oblique muscle incomplete paralysis strabismus must be operated early. The child’s binocular vision is generally formed before the age of 5. If the child is suffering from strabismus during the period of visual development, both eyes cannot look at the same target at the same time, so there is no way to talk about the development of binocular vision, and if it is not corrected in time, eventually the child’s binocular vision will not be developed normally and amblyopia will be formed, and the unpleasant appearance and compensatory head position will also cause damage to the child’s physical and mental health! 2, the strabismus caused by refractive error is the first to correct refractive error (especially refractive regulative internal strabismus and partial refractive regulative internal strabismus), and according to the presence of amblyopia and then consider the treatment of strabismus. Generally speaking, amblyopia correction is given priority, and surgery for strabismus is performed after the basic correction of amblyopia. 3. For intermittent exotropia, if the degree of strabismus is low and the strabismus is usually not visible, the eye position can be observed on the basis of checking the visual function of both eyes. For intermittent exotropia with more frequent episodes, and intermittent exotropia with damaged or lost vision in both eyes, surgery should be performed early and timely. Postoperative training is emphasized to reconstruct normal binocular vision.