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How to choose their own sunglasses?

   At present, sales of sunglasses in the market there are two kinds of categories, one category is "sun mirror," usually in the sun to rely on the regulation of pupil size to regulate the flux, when the light intensity of more than ability to regulate the human eye, it will cause harm to the human eye . Mirror shade shelter can play the role of the sun, so as to reduce eye fatigue caused by excessive regulation or injury caused by light stimulation; the other is the "light-colored sunglasses," is more popular in recent years, the species, the main play decorative effect, when the sun is not strong when it can be used. Light-colored sunglasses because of its colorful, rich, fashionable and diverse, being a young person's favor. For this product, if there is no understanding of science, will have adverse effects on users. For example, long-term wearing of certain colors the human ed hardy sunglasses will lead to fatigue, if the wearing of such glasses are also wrong when the sun with a mirror, not only will not achieve the effect of the sun may also damage the eyes.
 

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