Sell Hotstore Photochromic Anti Radiation Blue Ray Transition Eyeglasses Women Men Replaceable Transitional Anti Blue Light best price

The photochromic eyeglasses undergoing a reversible change in color or shade when exposed to light of a particular frequency or intensity.that is , if you test it by hands only , it didn't work . how to test it's photochromic? first : you need a good weather.It means the sun has to reach a certain intensity . second : let the photochromic eyeglasses exposed to the sun fully last: please wait patiently Color: 6 colors Gender:Unisex Lens Material: PC Frame Material: Metal Lens Attribute:UV400/ Radiation protection/ Photochromic ____________________ Lens Width:59 mm Lens Height:49 mm Bridge Width:19 mm Leg Lnegth:138 mm Frame Width:136 mm Weight: 18.6 g