Intermittent exotropia is the most common type of exotropia, and its incidence is still relatively high in China. The characteristics of intermittent exotropia are: sometimes the eye position can be controlled by the fused image collection (no strabismus); sometimes the eye position is out of control and becomes a dominant strabismus. Generally speaking, intermittent exotropia is a state between exotropia and exotropia, and its exact pathogenesis is not clear. External strabismus is often intermittent, while internal strabismus is often dominant, and is associated with a much greater ability to gather than to separate in humans. Families of patients often ask how intermittent exotropia will develop later if left untreated and unintervened. In general, about 70% of patients will become more and more pronounced as they age, and will gradually lose control over the fusion of eye positions; 20% of patients can maintain the same obliquity for a longer period of time and can continue to control their eye positions; the percentage of patients whose obliquity becomes smaller and whose control becomes better and better is very small. Clinical manifestations: Intermittent exotropia usually occurs between the ages of 2 and 8 years, but is also found in adulthood. Initially, usually when the patient is tired, or sick, the family will notice that the child’s eye position is not correct, but when you remind him, the eye position is soon controlled orthotropically. At this point, if one eye is covered, the exotropia becomes apparent. The patient’s symptoms may include, blurred vision, visual fatigue, photophobia, squinting when going out to look at a distance or looking at the sun, as well as tired eyes and painful brow arches. Treatment of intermittent exotropia: If the exotropia manifests itself more frequently in life and exceeds 50% of waking hours, the patient is in danger of losing binocular vision and needs surgical correction; conversely, if the eye position is usually well controlled and the exotropia is only occasionally exposed, follow-up observation can be done. Currently, there are also some attempts of conservative treatment, but the results are not too exact. If the exotropia is small and only one eye is always oblique, you can try to cover the dominant eye (the eye that is not oblique) for 3-4 hours a day, which can increase the degree of control. Set training is also helpful for squint control when looking close.