Convergence is the ability to accurately coordinate the eyes on an object in space in order to see a single, three-dimensional image. Equally as important, is the ability of both eyes to team together and give simultaneous feedback to the brain in order to process the target correctly. More than 20 million people in the US suffer from Convergence Insufficiency, the inability to coordinate their eyes when performing close work. Symptoms can include: eye strain, headache, double vision or dizziness and motion sickness. Vision therapy can help to improve eye coordination and teaming abilities as well as eliminate symptoms and discomfort.