How to choose sunglasses
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Sunglasses, also known as sunshades, are used for sunshade. People usually adjust the luminous flux by adjusting the pupil size in the sun. when the light intensity exceeds the ability of the human eye to adjust, it will cause harm to the human eye.<br><br>Therefore, in outdoor activities, especially in summer, sunshades need to be used to block the sun to reduce the fatigue caused by eye regulation or the injury caused by strong light stimulation.<br><br>
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How to choose sunglasses
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