Hillary Clinton’s blue sunglasses bear a striking resemblance to the lenses worn by victims of epileptic seizures.

Epileptic patients often wear Zeiss Z1 blue lenses in particular because they are effective at treating photosensitive epilepsy.

“The Z1 lens is highly effective in controlling photoparoxysmal response in a very large number of photosensitive epilepsy patients irrespective of their epilepsy or antiepileptic drug treatment,” according to a 2006 study published in Epilepsia. “The lens might become a valid resource in the daily activity of any clinician who cares for patients with epilepsy.”

Hillary experiences seizures from flashing lights, such as camera flashes at public events, according to sources inside the Secret Service