Brand Unisex Photochromic Sunglasses Polarized Day Night Vision Chameleon Glasses Men Women Driving oculos gafas de sol hombre eye glass styles for men

$104.07  $61.22
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  • Model: A01-4000032717317
  • 6274 Units in Stock

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Gender Men
Frame Material Aluminium Magnesium
Style Pilot
Lenses Optical Attribute Polarized
Lenses Optical Attribute Photochromic
Lenses Optical Attribute UV400
Department Name Adult
Model Number DN8033BS+
Lenses Material Polycarbonate
Lens Width 59mm
Lens Height 52mm
Eyewear Type Sunglasses
Item Type Eyewear
Usage Scope Driving,Fishing,Travel,Outdoor,Sports
Suitable For Face Round Face Long Face Square Face Oval Face
Package Box,Clean cloth,Card,glasses
Frame Feature Stylish Comfortable And Not Easily Scratches
Gender/Ages Men,Women & Youth Male
Season Spring,Summer,Autumn,Winter

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.