Photosensitive Seizures

Some video games come with a warning (vide infra).

Photosensitive seizure warning!
A very small percentage of people may experience a seizure when exposed to certain visual images, including flashing lights or patterns that may appear in video games. Even people who have no history of seizures or epilepsy may have an undiagnosed condition that can cause these “photosensitive epileptic seizures” while playing video games.

Discuss...please.