Advanced Binocular Vision (ABV) Exam 2 Practice

The TV trainer is best described as a passive anti-suppression therapy. It works by delivering binocular input through a TV setup in which each eye sees a different image (via filters or glasses), so both eyes receive simultaneous stimulation. This encourages the brain to fuse the two images rather than suppress one eye, helping reduce cortical suppression of the suppressed eye over time. The key is that the patient just watches the program or game; no active eye-movement tasks or deliberate forcing of vergence are required, so it’s considered passive.

This differs from active vergence training, which requires the patient to perform specific eye-movement tasks to practice convergence or divergence; from occlusion-based therapy, which relies on patching the good eye to force use of the weaker eye; and from pharmacological treatment, which uses drugs. The TV trainer’s main role is to promote binocular fusion without active tasks, fitting the anti-suppression approach in a passive form.