The strong stimulation of sunlight can cause injury to human eyes and affect vision. Sunglasses appear to solve this problem and also reflect personal style. fit over sunglasses ，People will choose sunglasses according to different needs. What are the specific functions of sunglasses?
1. Sunglasses can prevent harmful ultraviolet rays and prevent eye diseases.
2. Reduce the intensity of visible light, the visible light is too strong, it is easy to make the eyes tired.
3. Sunglasses can reduce eye fatigue, improve visual quality and color contrast.
4. Sunglasses certified by the "UV400" mark are truly effective sunglasses, which can block more than 99% of ultraviolet rays.
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