Known as Photosensitive Epilepsy, the seizures I am specifically referring to are triggered by flashing lights or flickering lights.
These seizures are predominantly found in younger children and adolescents. It is unusual to find this type of seizure diagnosed in someone older than 20. Approximately 3% of people who are subject to flashing lights will subsequently experience a seizure. In some circumstances, individuals are unaware that they are sensitive to such lighting until they actually have a seizure.
The average rate where flickering tends to be an issue is between 3-30 hertz (flash per second); however, of course each person’a response will be diverse.
Triggers can include:
- Television screens/computer moniters
- Strobe lighting
- Flickering light, such as when one is on a train and the sun intermittently shines through the trees at the speed of the train.
- Video games
- Lights from the emergency services
In any event, one of the preventative techniques to help is to cover one eye or close both as it will reduce the intensity.
As with the majority of seizures, medication is a method of controlling the them in order to provide a better quality of life.