Recognize the words UV400 or 100%UV protection, UV accounts for about 13% of the solar light reaching the earth's surface. The degree of uv damage to the human eye is mainly determined by the wavelength, radiation time and radiation intensity of uv and the strength of the human eye's own defense mechanism. The cornea and lens are the most frequently damaged eye tissues by UV. UV400 or 100%UV is generally marked on the Small Round Glasses, which means that the Mens Round Eyeglasses have anti-ultraviolet function.
The color of the lens should not be biased and should not distort the color of the surrounding environment. Before not wearing Cheap Polarized Sunglasses, observe red, green, yellow and other colors of the object, and then wear sunglasses, observe the same object, the color of the two observation can not be biased, otherwise it will reduce the ability to identify traffic lights. For colored lenses, especially colorful Polarized Sunglasses For Sale should pay attention to this identification.
Red lenses are better at blocking some shorter wavelengths of light, but other protective effects are less than the three colors mentioned above. In addition, we should avoid using blue lenses when driving, because it will make us unable to distinguish the color of traffic signals.
没有评论:
发表评论