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 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
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Model : Frame AB 6639 Old
Material : Iron / Size : 51-19-145mm
lens: photochromic
Unisex (Can be worn by men or women)
quality: imported quality
design: korean
Items are packaged neatly and safely
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For more information, please contact customer service
Product details: glasses ×1
SHIPPING: 7-15 WORKING DAYS