Colin Lee Opticians - Transitions XTRActive lenses go darker than any other photochromic lens, even behind a car windshield. Available in 3 iconic colours, Transitions XTRActive can help to deliver optimal visual
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How can my glasses change from transparent, when I'm inside, to dark when I go outdoors? | HowStuffWorks
![Transitions and Photochromic Lenses, Lots of Options! The Open World Of Transitional Lenses! - YouTube Transitions and Photochromic Lenses, Lots of Options! The Open World Of Transitional Lenses! - YouTube](https://i.ytimg.com/vi/aXV0u1aGgNo/maxresdefault.jpg)
Transitions and Photochromic Lenses, Lots of Options! The Open World Of Transitional Lenses! - YouTube
![Photochromic to darken & lighten tint behind windscreen. Polarized to cut glare. Three colours in one lens Photochromic to darken & lighten tint behind windscreen. Polarized to cut glare. Three colours in one lens](https://www.drivewear.com/Images/Drivewear-Three-Lens-States_844px.jpg)