re: Newsweek has internet troll arrested by FBI

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Does the gif have to be full screen and stared at for 30 seconds to initiate a epileptic seizure?

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Just three per cent of epileptics suffer with photosensitivity – meaning flashing or flickering lights induce their seizures. Triggers include everything from ceiling fans, interactive whiteboards, and Christmas tree lights as well as, of course, gifs.

“Any flashing image between 5-25 Hertz (flashes per second) has the potential to trigger a seizure in someone who is photosensitive, although this is very rare,” says Professor Ley Sander, a medical director at the Epilepsy Society and professor of neurology at University College London. “People who are photosensitive should be very cautious when online as the internet and social media are full of flashing images.”

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