Aluminum Magnesium Photochromic Sunglasses

MSRP price: $53.77

Save: $27.00

$26.77

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What are photochromic glasses?

Photochromic lenses have millions of molecules of substances such as silver chloride or silver halide embedded in them.

When exposed to UV rays, as in direct sunlight, the molecules undergo a chemical process that causes them to change shape. The new molecular structure absorbs portions of the visible light, causing the lenses to darken, and to improve vision while ensuring protection from hazardous optical radiation.

The darkening of photochromic lenses was reversible, i.e., the lenses became original shape again once the ambient light was lowered.

An important note about photochromic lenses:

because they react to UV light and not to visible light, there are circumstances under which the darkening will not occur. Frist example, is in your car. Because the windshield blocks out most UV light, photochromic lenses will not darken. Second,is indoors test with ordinary lighting(Because the lighting used in daily lighting does not contain ultraviolet light),photochromic lenses will not darken.

So the ways to activate photochromism: Exposed to UV rays, as in direct sunlight OR Use ultraviolet light lamp (not ordinary lighting lamp).This is the way to activate the photochromic function of the product. Below is a test video of the buyers,you can watch on his YouTube channel at the following link https://www.youtube.com/watch?v=M-UWy3flKmc&t=19s

Thank you!!!


Brand Name: COOLPANDAS

Gender: Men

Frame Material: Aluminium Magnesium

Style: Semi-Rimless

Lenses Optical Attribute: UV400

Lenses Optical Attribute: Polarized

Lenses Optical Attribute: Photochromic

Department Name: Adult

Model Number: 8177DNBS

Lenses Material: Polycarbonate

Lens Width: 65mm

Lens Height: 38mm

Eyewear Type: Sunglasses

Item Type: Eyewear

Frame Feature: Stylish Comfortable And Not Easily Scratches

Lenses Optical Attribute:: 100%V400,Anti-Reflective,HD polarizing lenses

Suitable For Face: Round Face Long Face Square Face Oval Face

Usage Scope: Driving,Fishing,Party,Fashion Show,Outdoor,sport

Package: Glasses,Case,Bag,Clean cloth,Polarizied test card

Gender/Ages: Men,Women

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