Polarized sunglass lenses are created by incorporating a special filter in the lens that blocks horizontally polarized light. The horizontally polarized light is created when light is reflected off of flat surfaces such as water or a flat road. This type of light or glare can be intense and distracting. Polarized sunglasses greatly improve comfort by reducing this type of light and are considered a necessity by those who drive for a living or are outdoor enthusiasts. The ultraviolet protection is not impacted by the polarization process.