How Polarisation Works
The sun’s rays reflect light in every direction, so when a ray hits a flat surface, the reflected light shines back at your eye and is magnified, causing glare. Glare is a real irritation, it reduces your depth perception, distorts your view and colour perception and can even temporarily blind you. Regular sunglasses are designed to only reduce the amount of light that is transmitted through the lens horizontally and vertically. But the chemical filter on the lenses of polarised sunglasses is designed to absorb horizontal light waves, while still allowing vertical waves to pass through.
Because light only travels in one direction through polarised lenses the glare is eliminated, increasing the enjoyment of what you can view.