Many a time, as you’re driving down the road during the day, the sunlight reflected from the cars ahead of you can get really annoying.

It decreases your visibility, and the glare from the flat long road ahead can be potentially hazardous too.

In such cases and many more, polarized sun glasses come to your rescue.

Let’s see how these shades really work.

When 2 polarized sunglasses are positioned perpendicularly, they cut out both horizontal and verticl rays, effectively cutting out all light

When light gets reflected off a flat surface like asphalt, smooth water, etc., the light gets polarized.

This results in a glare that can range in intensity, sometimes even blinding you.

Such light is usually horizontally polarized.

Polarized eyewear are vertically polarized so as to neutralize the glare, enabling you to see things clearly, even with bright, shining sunlight around you.

Yes, sunglasses also cut glare, but they diminish intensity of all light sources, even the helpful ones.

On the other hand, polarized eyeglasses selectively cut out only the reflection of light from the road or the water surface.

Therefore they are better than other normal dark shades.

Activities like fishing out in the open sea during noon, driving or snow skiing and other outdoor sports require you to be able to see things clearly.

Polarized sunglasses ease much of the trouble you might encounter, no thanks to the glare from the surrounding areas.

Polarized glasses are not much good when the position of the sun is too low or too high, especially if you’re out on the sea.

Also, these glasses are not suited for looking directly at the sun.

But for people who have light-sensitive eyes or who frequently change their environment from outdoors to indoors, polarized glasses are just the thing they’ve been looking for.

Lim Zheng Yang has dedicated countless hours researching on eye care related issues He also specializes in information about eyewear. For more information on UV protection, kindly visit his site.