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Use the blue light torch to beam the sensitive area of blue light testing card and FEIYOLD Glasses as shown in the first picture. We can see that the part of testing card beamed by the torch has turned purple, and the other part shaded by FEIYOLD Blue Light Blocking Glasses has not turned purple.
☀【Reduce Eyestrain】Prolonged exposure to blue light will cause eye fatigue, blurred vision and headache. You will notice a difference, in just a few days, with our computer glasses. The glasses will block the most harmful blue light from your computer, phone and TV.
☀【 High-Quality Materials】The 3A transparent lens not only blocks 99% of the harmful blue ray spectrum (400-440nm), but also allows high transmittance (93%), providing a perfect balance between eye protection and the visual experience. The lightweight and durable TR90 frames put no stress on your nose ensuring comfort for long periods of time.
☀【Sleep Better】Prolonged exposure to blue light will slow or stop the production of melatonin, which causes sleep disorders. FEIYOLD Blue Light Shield can protect you and provide you with a better night’s sleep.
☀【2 Pairs of Glasses at a Great Price】Keep a pair in each of your reading areas, or share one with your friend or family. It’s economical and convenient. Best sure to buy for your parents, friends, any seniors in your life and yourself.
☀【Worry-free Service】We believe in our product. Any problem with this product, please contact us. We will always be here to solve your problems. There is no risk for you to try!