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can block the light reflected from the ground, wall, water surface, etc., to make the field of vision clearer 1. advantages: (1) beautiful decoration; (2) cover eye defects; (3) reduce the adjustment burden of eye ciliary muscle under strong light; (4) block out harmful light; (5) protect eyes from hurt; (6) wear sunglasses, it looks thinner ultraviolet rays can damage the cornea and retina, and high-quality sunglasses can completely eliminate ultraviolet rays. high-quality sunglasses can use polarizing technology to completely eliminate therefore, there is indeed a difference between the various types of sunglasses. choosing the right, high-quality sunglasses for your specific usage environment will provide you with maximum protectio