Binocular Vision Dysfunction: An Unsuspected but Treatable Cause of Persistent Post-Concussive Symptoms - On DemandClick here for Access Instructions for On Demand Programs. Each attendee must register individually as they will need their own login to access the event. This brain injury video features one of the worlds leading behavioral neurologists and imaging neuroscientists, Dr. Randall Benson, as he discusses binocular visual dysfunction (BVD)a frequent cause of neurological symptoms in clients who have suffered mild or severe traumatic brain injuries (TBIs).