UV400 SUNGLASSES POLARIZED THINGS TO KNOW BEFORE YOU BUY

Blacklight test: Dr. Nagori implies using a affordable blacklight. She clarifies that If the sunglasses glow underneath it, they're not blocking UV rays.Nevertheless, it shouldn’t be assumed that each black sunglass lens is UV400 rated, as in order for a pair of glasses to get regarded as UV sunglasses, lenses are only necessary to block a minimu