Round retro female far and near two use of outdoor transition sunglasses photochromic bifocal hyperopia presbyopia (2pcs purple+blue, 2, multiplier_x) - Melrose

• Lenses will begin to clear as soon as they are away from UV sunlight, and will be noticeably lighter and mostly clear within a few minutes.They absorb 100% UV radiation that can otherwise damage your eyes. The lightweight frame includes small sections of magnification along the bottom of each lens offering the power you need while the rest of the lens has no magnification. Available in powers:+1.0/+1.25/ +1.50/+1.75/ +2.00+2.25/ +2.50/+2.75/ +3.00. Advanced Bifocal reading sunglasses, the upper optical area of the lens is used for the far view, and the lower optical area is used for near view. Photochromic lenses are also referred to as light-sensitive lenses". Glass lenses are adding silver halide, but now is the mainstream of photochromic resin lenses, adding of spiro and other chemicals in the acrylic resin lens, so that the original colorless and transparent lenses, in bright light, will become colored lenses, to do the protection, so is suitable for indoor and outdoor use. Responsible After-sale Service: We promise that it is replaced in 30 days with a lifetime warranty! In case of any problemsr. within 30 days, please contact our customer services without hesitation. We will provide the best solutions until the customer is satisfied. You have no risk to try!