Intermittent exotropia often occurs in children 2-3 years old, initially only when looking at a distance, but as the disease progresses, the number and duration of intermittent exotropia increases, and then exotropia can occur when looking at the near. The dominant phase of intermittent exotropia often occurs with fatigue, illness, drowsiness, or inattention. A common symptom is photophobia, often with the eyes closed in outdoor daylight. If these conditions are detected, the child should be taken to a regular hospital for examination of all strabismus programs. Special attention should be paid to the determination of diagnostic strabismus angles, such as the angle of deviation when looking at a distance, and it is best to make the patient look at a target >6 meters away to fully check its exotropia and determine the type of exotropia, because the timing of treatment and treatment methods differ. Check the sharpness of stereo vision: Patients must also measure their stereo vision during the occultation period. If the stereo vision is not normal, it means that the stereo vision caused by intermittent apparent obliquity decreases, and the stereo vision continues to decrease within a few months, it means that the intermittent exotropia should be surgically corrected. Treatment: 1, early intermittent exotropia because most of the time for the external oblique, not many times, not much skew, not advocate surgical treatment. 2. If stereopsis or binocular simultaneous vision abnormalities appear, appropriate training can be used. If the training is not effective, surgery is needed. 3.For children who do not want to operate temporarily, they can wear trigeminal lenses to avoid further destruction of stereopsis. 4.Surgical treatment of intermittent exotropia, the most appropriate age for surgery is still debated. Some people advocate that the earlier the surgery, the better, otherwise it will become constant exotropia. Most people still advocate surgery when the visual function of both eyes is damaged. This requires the patient to go to the hospital for specialist examination in a timely manner. 5, post-operative treatment of exotropia after surgery should be mildly overcorrected in the near future, generally speaking, it is 10 to 20 internal obliquity, the degree of overcorrection varies with age. After surgery, if the stereo vision function or binocular simultaneous vision and fusion function are not sound, training is also needed.