Specification of OWNEST Sunglasses Women Men 2015 Summer Style Sports Outdoor Cycling Wayfarer Sun Glasses Colorful Frame
Item Type : Eyewear
Eyewear Type : Sunglasses
Department Name : Adult
Brand Name : OWNEST
Gender : Men
Style : Wayfarer
Lenses Optical Attribute : Mirror
Frame Material : Plastic
Frame Color : Multi
Lens Width : General
Lens Height : General
Lenses Material : Polycarbonate
Model Number : G0293
UV : UV400
Gender : Unisex
Discount : 0% OFF
Min. Qty. 1/lot.
Promotion End : 2015-09-06
Buy Now $4.75
--- Last Updated: 2015-08-13
--- Product prices and availability are accurate as of the date/time indicated and are subject to change.
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--- Date/Timezone : Asia/Shanghai
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OWNEST Sunglasses Women Men 2015 Summer Style Sports Outdoor Cycling Wayfarer Sun Glasses Colorful Frame
How Do Sunglasses Help?
As we get older, our eyes undergo physiological changes that can cause vision problems and eyediseases such as age-related macular degeneration and glaucoma. Ultraviolet light from the suncarries two types of radiation, UVA, and UVB rays (which also cause photoaging and wrinkling ofour skin). Since UV light carries more energy than visible light, it can do greater damage to oureyes. As we age, the damage simply has more time to accumulate: a cataract, (cloudiness of thelens) for example, is believed to be caused by many years of exposure to bright sunlight.Sunglasses designed to block 100% of UVA and UVB rays so that it can protect your eyes againstthis cumulative damage.
How dark should you go?
While very dark lenses might seem to offer greater protection, how dark the lens is only affectsvisible light, not ultraviolet light.
Natalie Hutchings, Associate Professor in the University of Waterloo's School of Optometry andVision Science, says dark lenses can actually cause the pupil of your eye to get larger to let in morelight, making UV protection even more important. "Degree of darkness and lens color or tint arenot the factors which protect your eyes," she says. "It's crucial to choose glasses which block100% all of the UV light, both UVA and UVB. This protection can be a function of the material theglasses are made of, the thickness of the material, or it may be a coating on the lens - even inlenses without any color or tint at all. It's the 100% UV blockage you should look for on the label,since you can't tell whether they have it, just by looking at the glasses."
Other Ways to Protect Your Eyes in the Sun:
Sunglasses offer just one form of protection for aging eyes. Health Canada and other agenciesadvise also wearing a visor or wide-brimmed hat when you're outdoors, and avoiding times ofbrightest and most intense sunlight, such as summer days between the hours of 11am and 4pm (when the UV index is highest).