What should you know about epilepsy lights?

Photosensitive epilepsy is a form of epilepsy in which particular visual stimulation can provoke abnormal electrical activity in the brain. Triggers may include strobe effects, rapidly changing images, strong contrast, or repeating geometric patterns. Television, games, concerts, emergency vehicle lights, and online videos can contain these effects, although exposure does not trigger seizures for everyone with epilepsy.

A seizure may involve staring, jerking, loss of awareness, or a fall. A light trigger is only one possible factor; missed medicine, poor sleep, illness, and stress may also affect seizure control.

If flashing content appears, look away, cover one eye rather than both, move farther from the screen, and leave the area if you can do so safely. Reduce screen brightness and avoid watching rapidly flashing material when tired. Do not stop prescribed epilepsy medicine because of light sensitivity. Keep a record of the visual setting, symptoms, and recovery, and arrange a medical assessment if an episode is new or changing.

Call emergency services if a seizure lasts longer than usual, repeats without recovery, causes a serious injury, happens in water, or breathing does not return normally. Seek prompt medical care for a first suspected seizure, pregnancy, diabetes, or a new neurological symptom. During a seizure, clear nearby hazards, cushion the head, turn the person on their side when possible, and never put anything in their mouth.

Ask whether your symptoms suggest photosensitivity, whether an EEG or other assessment is appropriate, and which screen or workplace precautions fit your situation. Ask how family or colleagues should respond if you have a seizure.