Sarengeti Leonora Shiny Black polarized photochromic sunglasses

Sarengeti high quality sunglasses with polarized photochromic mineral lenses. I have had the glasses arms adjusted to my face, you may also want to adjust them to your precise fit at an eyeglasses shop. "Our mineral lenses are made with borosilicate optical glass, from Corning®. A full 20% thinner and lighter, our Borosilicate mineral glass lenses are finer than any other lens. Produced in the same process normally reserved for ophthalmic-quality corrective lenses, they provide the best visual acuity you could ever experience. They are also chemically tempered to ensure scratch and impact resistance. To complete this unrivalled visual experience, an anti-reflective coating is added to the backside of the lens, canceling the scattering light that causes reflective glare. As the pioneer of Photochromic technology, Serengeti® leads the industry in creating lenses that adapt to any light condition in any setting. Serengeti® Photochromic lenses are activated by the amount of UV radiation in the atmosphere and engineered to transition from light to dark, gradually. In bright conditions, UV radiation is more intense. The lens molecules expand in size, darkening the lenses. Less light can then pass through. In darker conditions, UV radiation is less intense. The molecules shrink and separate, lightening the lenses. More light can pass through. Your eyes are always protected and receive the optimal amount of light needed at any times and in all weather conditions."