The sunglasses these secrets you certainly do not know quality cheap oakley sunglasses UV protection, it is better not to wear.
Just buy pairs of sunglasses at a roadside shop to have fun? Those who are not poor quality UV sunglasses, it is better not wear.
Wearing sunglasses in order to prevent the light, ultraviolet damage to the eyes, first shading prevents glare light-induced headache; followed by the sun's ultraviolet rays into the retina, causing retinal macular degeneration, and even cataracts and other eye diseases.
The pupil of the eye will naturally shrink in bright light, natural zoom in low light, in order to ensure that the visual function of the eye. Quality sunglasses just with colored lenses block the light, the pupil of the human eye will naturally zoom in low light, but poor quality sunglasses lenses and UV protection function, dilated pupils it will absorb more ultraviolet light. Especially children sunglasses, a lot of parents give their baby to buy some nice plastic fake oakleys sunglasses. Lenses not only block the ultraviolet, plastic lens material will absorb the heat of the sun, but more damage to the baby's eyes. Dilated pupils by ultraviolet irradiation lowers the protection of the pupil would be better, so better not wear wearing quality sunglasses.
Lens color has nothing to do with UV
Choose sunglasses many people will ask: what color UV effect? In fact, the color of the lens shading influential has nothing to do with UV.
Sunglasses color to light gray, brown or smoke color on the election, followed by green, amber, blue, red used only as a sun or snow. The car is best to use polarized sunglasses, because they are able to decrease glare. If you wear cheap oakleys sunglasses, others can very clearly see your eyes, and then your lens color is too light.
So, the lenses that affects only the degree of shading, the degree of UV by the lens material. Select Lens Color only need to consider the factors of light, UV effect can listen to the professional optician recommended to choose.
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