As light waves travel through the air they vibrate in all directions, so in everyday situations glare is seldom a problem.
Trouble comes when light reflects of a horizontal surface such as still water or wet pavement. This causes many of the light waves to vibrate in a horizontal orientation so when they hit your eye they create what you might think of as a hotspot that registers as glare.
Polarized lenses contain a filter that is oriented vertically which blocks most, if not all, of the vertical waves. Picture yourself trying to walk through a doorway while holding a mop handle across your chest. Thus, the lenses ability to filter horizontal light waves is what allows you to see through the water’s surface and into the depths.
One minor downside, however, is that the vertical filters that eliminate glare also make it difficult to read LED screens. That’s why you often have to remove your shades when you’re at the ATM or trying to get to the “Begin Fueling” screen at the gas pump.
If you’re looking for an awesome pair of fishing shades, visit the North American Fisherman Store. You can get a 10% discount on Wiley X Echo sunglasses, plus free shipping and a free Float Strap to boot.
Bonus Video: Hammer Torture Test