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/mqdefault.jpg)
3 Tips for choosing Photochromic Lenses | Transitions / Reactolite / Sensity / Photofusion - YouTube
The Eye Surgery & Laser Centre - Yes. Photochromic lenses turn dark and offer protection from the sun on exposure but when in most modern cars, the windscreens have UV protection properties
![I tried Acuvue's contact lenses that turn dark under the sun - and I'd buy them if it weren't for the price, Lifestyle News - AsiaOne I tried Acuvue's contact lenses that turn dark under the sun - and I'd buy them if it weren't for the price, Lifestyle News - AsiaOne](https://media.asiaone.com/sites/default/files/styles/article_main_image/public/original_images/Aug2019/lenses_cover.jpg?itok=tAFi81m5)