Convergence Insufficiency is the most common binocular problem, occurring in approximately 5% of school-aged children.  Symptoms include loss of place when reading, double vision, blurry vision, and headaches.  A recent study by the National Eye Institute (NEI) (part of the National Institute of Health or NIH) concluded that an office-based vision therapy program is the most effective treatment for this disorder.

This video, prepared by the NEI,discusses convergence insufficiency, and its treatment as supported by the Convergence Insufficiency Treatment Trail (CITT).