What is the advantage of polarised sunglass lenses?

Polaroid lenses filter out light in a single plane - this includes light which has been reflected off glass and water (you can see this effect with a polarising filter on a camera). This means that they effectively remove the glare you would normally get from, for example, the ocean, without resorting to really dark lenses.

This makes polarised sunglasses with lighter tints ideal for sports and driving, removing the glare without compromising overall visibility.

Polarized lenses are made to neutralize the effect of glare. A 'glare' is caused when the sun's shining rays reflect off a solid surface or water. A 'glare' is typically horizontally polarized. And the lenses are made of vertical polarizers - so Voila! - They effectively neutralize the villainous glare! Advantages of Polarized Sunglasses: Polarized sunglasses are specially made for reducing the harmful effects of glare and eye-damaging light. And they are a perfect boon, for all your outdoor activities.