From two key indicators to see if sunglasses are qualified

The intensity of blocking the harmful light (strong light) and the signal resolution of the traffic light is the two key indicators for detecting whether the sunglasses are qualified. So what does this have for us to buy sunglasses? Ray-Ban RB3025-J-M Men's Sunglasses 146/32 White/Gray Lenses When buying sunglasses, first check the quality of the lenses. Pay attention to whether the surface of the lens is lubricated, whether there are abrasion marks or air bubbles, lay the lens flat and there should be no warpage from the horizontal direction. You can take the sunglasses 45 cm away from your eyes, and use the glasses to investigate the surrounding vertical and horizontal lines, such as window frames or door frames, and then move the glasses up and down. Ray-Ban RB4175 Men's Sunglasses 877/Z2 Black Gold/Pink Films If you find a straight line distortion or swing, it means that the lens is deformed and it is not suitable to purchase. Lenses that are uneven or have marks or bubbles will cause discomfort such as dizziness after wearing them, so they are not suitable for purchase. The lens of individual glasses is very thin due to cutting corners during processing, and deformation will occur after high temperature, which will also cause dizziness. Second, attention should be paid to the color of the lens. To protect the eyes from infrared and ultraviolet radiation, the color of the glasses should have a satisfactory depth. Generally dark gray is best, dark brown and black are the next, blue and purple are the worst, because these two lenses will transmit more ultraviolet rays. Try not to use yellow, orange, and light red. Ray-Ban RB2132-F Men’s Sunglasses 622/17 Black/Colorful Blue Film Children under 10 should try not to wear sunglasses. Sunglasses should only be worn in the sun. It is not necessary to wear them on cloudy days and indoors. Especially remind parents to pay attention when choosing sunglasses for their children: children under 10 years of age are still developing their vision, so parents try to avoid choosing sunglasses for them, especially orange and light red lenses are not only poor in radiation protection, but may also be harmful to children. Damage to his eyes. Related reading: Sunglasses Brand Sunglasses
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