CRIXALIS Brand Photochromic Polarized Sunglasses for Men Fashion Rectangle Sun Glasses Male Outdoor Sport Fishing Shades UV400
$6.57 NZD
Description:
Origin: Mainland ChinaApplicable Scenarios: sport
Gender: MEN
Style type: square
Model Number: CR-9102
Item Type: EYEWEAR
Product Type: Sunscreen sunglasses
Department Name: ADULT
Frame Material: Acetate
Element type: Outdoor sports
Hign-concerned Chemical: None
Lenses Material: TAC
Lenses Optical Attribute: polarized
Lenses Optical Attribute: Photochromic
Lenses Optical Attribute: Anti-reflective
Lenses Optical Attribute: UV400
Lens Height: 44mm
Lens Width: 55mm
Place Of Origin: China (mainland)
Eyewear Type: Sunglasses
Certification: CE
Choice: yes
semi_Choice: yes
Matters Requiring Attention:
1. Definition of Color-Changing Glasses
Color-changing glasses, also known as photochromic lenses, operate on the principle of ultraviolet (UV) irradiation rather than direct sunlight. Consequently, these lenses can change color even on overcast days or indoors.
2. Principle of Color Change
It is well established that sunlight carries ultraviolet radiation, which can be harmful to human health. The mechanism behind color-changing glasses involves an automatic adjustment in lens tint depth in response to UV exposure, thereby safeguarding the eyes. Specific chemicals within the lenses undergo a chemical reaction when exposed to UV light, leading to a change in lens color. This means that as long as there is UV irradiation, whether from direct sunlight or ambient indoor lighting, the lenses will adjust their tint accordingly.
When driving, it is important to note that the front windshield of a vehicle filters out most UV rays. As a result, the color-changing lenses may not darken effectively because they require unobstructed UV exposure to function properly.
