Photosensitive epilepsy is a type of epilepsy, in which almost all seizures are triggered by flashing or flickering light. Both natural and artificial light may trigger seizures. Some patterns, like stripes or checks, can also trigger seizures for some people with photosensitive epilepsy.
Various types of seizures can be triggered by flashing or flickering light. These include tonic-clonic, absence, myoclonic and focal seizures. The most common is a tonic-clonic seizure. The seizure or seizure’s will usually happen at the time of, or shortly after, looking at the trigger.
Around 3 in 100 people with epilepsy have photosensitive epilepsy. It normally begins before the age of 20, most commonly between the ages of seven and 19. Photosensitive epilepsy affects more girls than boys.