Before shopping for polarized safety glasses, you need to find out how they work what they are and also how they can benefit you. You may or may not know it but light travels in wavelengths through the air and these wavelengths are known to vibrate in every direction. When it hits a surface, it is going to reflect off it and this is what is known as polarization. Light normally reflects off smooth surfaces like glass and water as well as snow and water as well as roads.