![The lenses of my glasses get darker when exposed to sunlight. Last night I left them at such an angle that only part of the lens was exposed to the morning sunlight The lenses of my glasses get darker when exposed to sunlight. Last night I left them at such an angle that only part of the lens was exposed to the morning sunlight](https://i.redd.it/u91a80mimwo51.jpg)
The lenses of my glasses get darker when exposed to sunlight. Last night I left them at such an angle that only part of the lens was exposed to the morning sunlight
![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)