Recent studies have shown that certain blue tints such as BPI Deep Blue Zee are helpful for people with light sensitive epilepsy. Of over 600 photosensitive epileptic patients tested, 94% had their photoparoxysmal responses (PPR's) completely eliminated or greatly reduced by using a deep blue lens.**"Suppressive efficacy by a Commercially Available Blue Lens of PPR in 610 Photosensitive Epilepsy Patients" G. Capovilla, et al. Epilepsia 47(3): 529-533, 2006

Tinted demonstration lenses of this color are available as Product Code 80919.

California residents: click link to product SDS and check Section 15 for California Proposition 65 warnings.