Came across this little heard syndrome while looking for Jason Durelo's don't wanna go home.
Abbreviated to PSE, this epilepsy is caused by visual stimuli. (viz: Bright colors, disco lights, ambulance et al)
Cause is unknown. Severity is highly variable, depends on the person, place, the stimuli.
TV is a common cause.
No cure found yet. Drugs & time can diminish effect. Most times, discovered by accident. In unavoidable situations covering one eye would help.