Here is a smart pair of sunglasses with photosensitive instant discoloration technology that you can wear anywhere to protect your eyes. The Changee sunglasses protect your eyes from strong sunlight but automatically change mode to let you see indoors or in the dark. A smart chip is used to recognize and react to changing conditions in only 0.1 second.
These glasses are solar powered and don’t require you to worry about charging their battery. They weigh less than 30g. Changee sunglasses offer UV400 level protection. You can support this project on Kickstarter.