http://www.infowars.com/report-hilla...re-sunglasses/
"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.”