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