Widely accepted as the best sunglasses for driving in the world, Serengeti pioneered photochromic lens technology, leading the worldwide optical industry in creating lenses that adapt to any light condition in any setting. All Serengeti models having photochromic lenses, darkening in bright sunlight and lightening in overcast conditions. They provide your eyes with the optimal amount of light at all times whilst blocking out the distracting blue light that causes eye strain. All Serengeti lenses improve contrast, reduce eye fatigue and enhance definition. Lenses are optically perfect and the premium quality frames are exceptionally strong but lightweight. A combination of what many believe are the best sunglass lenses ever created, as well as award winning frames, ergonomically designed for fit and comfort, mean that as soon as you put on a pair of Serengeti sunglasses you just know they are right.