It could cause a seizure if the person suffers from photosensitive epilepsy. That is one of the reasons why we have all those warnings in games that say “contains flashing images”. read more
Epilepsy is a physiological disease, with physiological causes, such as infections, stroke, etc. By itself, virtual reality cannot cause epilepsy. However, one symptom of epilepsy is seizures. A small percentage of seizures, such as photo-myoclonic and/or photo-convulsive, may be triggered by flashing lights, including computer displays. read more