All About Eyes Abuja - Lenses that go dark in the sun are referred to as #photochromic lenses. They have tiny molecules embedded in them that react with UV (ultraviolet) sun rays
![3 Tips for choosing Photochromic Lenses | Transitions / Reactolite / Sensity / Photofusion - YouTube 3 Tips for choosing Photochromic Lenses | Transitions / Reactolite / Sensity / Photofusion - YouTube](https://i.ytimg.com/vi/eV9M82_neY8/maxresdefault.jpg)
3 Tips for choosing Photochromic Lenses | Transitions / Reactolite / Sensity / Photofusion - YouTube
![1 Pair of Photochromic Reading Glasses - Reader That Darkens When Exposed to Outdoor Sunlight - UV Protection Readers - Walmart.com 1 Pair of Photochromic Reading Glasses - Reader That Darkens When Exposed to Outdoor Sunlight - UV Protection Readers - Walmart.com](https://i5.walmartimages.com/asr/78bc1205-72b3-48a6-80d1-8940a3d9603e_1.a8f0eac364f8a17ebc2f9a8d90ffda47.jpeg?odnHeight=612&odnWidth=612&odnBg=FFFFFF)
1 Pair of Photochromic Reading Glasses - Reader That Darkens When Exposed to Outdoor Sunlight - UV Protection Readers - Walmart.com
![How can my glasses change from transparent, when I'm inside, to dark when I go outdoors? | HowStuffWorks How can my glasses change from transparent, when I'm inside, to dark when I go outdoors? | HowStuffWorks](https://cdn.hswstatic.com/gif/How-to-activate-transition-lenses-without-sun.jpg)