A Pilot Randomized Trial Evaluating Short-Term Effectiveness of Vision Therapy in Children With Intermittent Exotropia
The main objective of this randomized trial comparing vision therapy to observation is to determine the short-term effectiveness of vision therapy on distance intermittent exotropia control. The results will help determine whether to proceed to a full-scale, long-term randomized trial.
• Age 8 - 16 years
• Intermittent exotropia meeting all of the following:
‣ Distance exodeviation of 15∆ to 35∆ by prism alternating cover test (PACT)
⁃ IXT, exophoria, or orthophoria at near
⁃ Near exodeviation that does not exceed the distance exodeviation by more than 10∆
⁃ Mean distance control score of 2 points or more with at least one measure being 3 points or higher
⁃ Mean near control score less than 5 points
• Random dot stereopsis of 200 or better on Preschool Randot Stereotest
• Willingness to accept randomization and no plan to relocate in the next 6 months