Eye glasses that can be manually switched to "sunglass mode" may be on their way
Smart sunglasses change tint with the click of a button and can even take phone calls | Daily Mail Online
Who wins in Prescription sunglasses vs transition lenses?
Light Reactive Variable Tint Lenses - Mary Washington Eye Care Center
Prescription Glasses that Turn into Sunglasses | RX Safety
Ultraviolet Eyewear Inc. - Transition lenses are great for an additional pair of glasses. They start to turn into sunglasses as soon as you step outside as they react to UV. Ask
Turn any frames into prescription sunglasses | Specsavers UK
What Are Photochromic lenses: Advantages and Disadvantages
Ray-Ban Transition Lenses | SportRx
What is a Transition Lens? and How Does a Transition Lens Work?
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
Glasses Direct ™ - Transitions® Light Intelligent Lenses™