[The progress of intermittent exotropia].

Intermittent exotropia is a type of strabismus between exophoria and constant exotropia. The onset age is usually one to four years old. Different from other types of strabismus, intermittent exotropia patient can maintain normal binocular vision in a long period of time. So how to choose the optimal timing and effective treatment is a challenge for clinicians. The objective of this article is to review the recent research progress of intermittent exotropia, including the severity classification, non-surgical treatment, timing of surgery and surgical methods, overcorrection and under correction treatment etc., and give some recommendations for the treatment of intermittent exotropia.