SOS Dive Optics Polarized Sunglasses are the first choice of SCUBA Divers, SCUBA Instructors and Dive Boat Captains around the world. They are also recommended for driving by reducing the reflected glare that comes off a long, flat surface such as the hood of the car or the highway. In fact, they can reduce the reflected glare that comes off a long, flat surface such as the hood of the car or the highway. Light reflected from flat surfaces is generally horizontally Polarized. This reflected light is blocked by the vertically oriented Polarizers embedded in the lenses. They work much like mini-blinds for your eyes, angled to maximize the protection from this annoying and sometimes dangerous glare. The result is clearer, safer and more focused vision.