PHOTOSHIFT lenses intelligently turns to a darker tint when exposed to sunlight, most commonly ultraviolet (UV) radiation, and fades to clear once indoor. It is beneficial to reduce glare and improve comfort when you're under the sun with just one pair of glasses.
* Photoshift grey is available
Benefits
▪ Fully clear indoors.
▪ Darkens outdoors in second.
▪ Return to clear faster than ever.
▪ Protects your eyes indoor and outdoor.