How to know if your sunglasses are polarized or not?

It is important to note that tinting has nothing to do with the color of the glass nor is it related to UV protection.
It is common to confuse the mirror effect with the polarized effect. The polarization affects the way light rays reach our eyes, it generates an anti-reflection effect of light on metal surfaces (such as cars) or water (beach, snow, rivers or lagoons).
On the other hand, the iridescent effect reflects all the light that bounces off the surface and is an aesthetic effect ("to pass cool") or simply to add character to your glasses.


We already know the difference between polarized and mirrored. So: A glass can be polarized and mirrored at the same time, but it could also be mirrored and non-polarized.

When the sun bounces off surfaces that produce reflections (cement, metal, water or snow) it reaches our eyes practically in 360º, the function
of the glasses with a polarized filter is to block this light vectorially so that it does not bother you when it reaches your eyes.
Think of the polarized as a rain of horizontal lines that block the passage of light, if you oppose two lenses and the lines are at 60º ± 90º they will block all the light that penetrates, that is, you will not see to the other side.

Now we want to teach you how to identify if your glasses are polarized or not, in a very simple way in your own home. Today we will show you two ways to identify them very easily:

1.- With a computer or television screen

First you must place your glasses in a horizontal position as seen in the image. And then rotate them as seen in the figure from the horizontal position to
60º to 90º. If the glass becomes blacker than usual and does not allow you to see to the other side then your glasses are polarized!

Note: The crystals that come with polarization darken, blocking the light.

2.- With other polarized sunglasses

If you have two sunglasses in hand, and they are both polarized, then we can do this test. You must place both lenses in a horizontal position as seen in the figure and then rotate one of them between 60º to 90º, if the light is blocked and you don't see anything on the other side, then both lenses are polarized!

Now that you know the acid tests that professionals use to test polarized lenses with simple tools, we challenge you to test your sunglasses and those of your friends and teach them to be sure of what they buy 😎!

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