Patients often ask, “Doctor, I’ve had strabismus surgery before, but my eyes are still squinting now, what should I do? Is it curable?” Well, let’s analyze why there is still strabismus after strabismus surgery? There are several reasons for this: 1. The patient’s own strabismus is large, or there are two directions of strabismus at the same time, for example: horizontal strabismus combined with vertical strabismus. This cannot be completely corrected in one operation (because more than 2 extraocular muscles cannot be done at the same time in one eye, otherwise it can lead to ischemia of the eye and threaten the vision), and needs to be corrected in stages; 2. For example, the original ectropion is 30 degrees, and after surgery there is still a residual of 5 degrees. This situation can be corrected through surgery again; 3, surgery over-correction. For example, the original exotropia of 30 degrees, after surgery into the internal obliquity of 5 degrees. For example, the original exotropia was 30 degrees, but after surgery, it became 5 degrees. Or the exotropia became an exotropia after surgery. For patients with exotropia, they can wait for one year for overcorrection, because patients with exotropia have a higher chance of recurrence, and early overcorrection is usually considered by doctors based on good long-term results. Early overcorrection is usually considered by the surgeon based on good long-term results. Due to the current level of research, the cause of strabismus is still unclear, but the part that controls our eyes to maintain parallel vision and not to have strabismus is in the brain. Since strabismus surgery is performed only by adjusting the muscles of the eyes to achieve the purpose of correction, strabismus may recur if the patient does not regain the brain’s control over the eye position after surgery for various reasons. For recurring strabismus, the surgery can be repeated to correct it. 5. The formation of scar after strabismus surgery. In the process of damage repair, the organism not only has strabismus but also restricts the eye movement of the patient due to the formation of obvious scar near the extraocular muscles. If this happens, another surgery is also needed to repair the scar and restore the eye position and eye movement. Therefore, strabismus that persists after strabismus surgery can also be surgically corrected. However, it is important to analyze the cause of the strabismus before reoperation in order to develop an individualized surgical plan.