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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
Photochromic Lenses: How Do They Work? | Warby Parker
Different Types of Photochromic Lenses and Their Benefits
ZEISS Sunglass lenses – Your perfect companion in the sun
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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
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Photochromic Lenses: Transitions and Light-adaptive Lenses
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