Convergence insufficiency occurs when your eyes don't turn inward properly while you're focusing on a nearby object. When you read or look at a close object, your eyes should converge — turn inward together to focus — so that they provide binocular vision and you see a single image. But if you have convergence insufficiency, you won't be able to move your eyes inward to focus normally.

Convergence insufficiency is usually diagnosed in school-age children and adolescents. Convergence insufficiency can cause difficulty with reading, which may make parents or teachers suspect that the child has a learning disability, instead of an eye disorder. Treatments are usually effective for convergence insufficiency.

Jul. 16, 2011