【Reduce Eyestrain】Blue light blocker with UV400 lenses help you block 100% harmful blu ray & UVA/UVB, which must have for tv, video, pc, phone or other digital screen. Reduce eye strain, headache(migraine), glare and dry eye, protect your eyes。 【Radiation protection】Efficiently prevent electromagnetic radiation from TV, video, personal computer, telephone or other digital screens.Anti Reflective HD Lens ，Scratch resistant, non prescription. Amber tint, close to clear lens, no color difference。 【Smart photochromic material】 The magical photochromic material, when used outdoors, changes the transmittance of the lens with the intensity of ultraviolet rays. The transparent lens instantly turns into a light gray sunglasses lens. 【Sleep Better】Prolonged exposure to blue light will slowing or stopping the production of melatonin, causing sleep disorders. transparent lens not only block 99% harmful blue ray (400-440nm), also with high transmittance (93%), providing a perfect balance between eye protection and visual experience. 【Worry-free Service】We believe in our product. Any problem for this product, please contact us, we are always be here to solve your problems. You have no risk to try!