Last Updated on September 24, 2020

How to check polarized sunglasses: What is the polarization? Polarization is the filtration of light (glare) reflected from any horizontal surfaces. Polarization is carried out by a special filter placed in the lenses of glasses.

How to Check Polarized Sunglasses

What Are Polarized Glasses for?

Glasses with a polarizing filter are needed to reduce the load on the eyesight, for more clear visibility in sunny weather.

Anti-glare and Polarizing Glasses, What’s the Difference?

In fact, this is a different name for glasses with a polarizing filter. If the glasses have a polarizing filter, then they are anti-reflective.

How to Check Polarized Sunglasses at Home?

To check polarized sunglasses at home, you need a smartphone screen or a monitor screen. Looking at the screen, rotate the lenses of the glasses 90 degrees. If you still see the text on the screen, then there is no polarizing filter in the glasses.

What Are Polarizing Glasses?

Polarized glasses are glasses whose lenses have a polarized filter. While everything seems to be clear or vice versa, nothing is clear, but let’s understand what polarizing glasses are and why we need a polarizing filter.

Immediately make a reservation, all the tests for the polarization of sunglasses that are described in this article were tested on this model of the Best Polarized Sunglasses Under $50. This model of polaroid glasses is inexpensive and very popular, so it was she who was chosen for the test.

How to Determine if There is a Polarizing Filter in the Lenses of Your Sunglasses or Not?

First, you need to understand what polarization is and why this very polarizing filter protects your eyes. Please do not confuse the polarizing filter in sunglasses (the use of this filter in sunglasses is optional), and the filter protecting the eyes from ultraviolet radiation (must be present in all sunglasses, otherwise why are they needed).

Some Scientific Facts About Polarization


Daylight propagates in the form of electromagnetic waves oscillating in all directions of three-dimensional space.

Polarizing light

Polarizing light propagates already in two-dimensional space, in horizontal and vertical directions.

In simple terms: light propagating in a vertical direction allows the eyes to perceive important information, recognize colors and contrasts. Horizontally propagating light creates optical interference (glare). For those who want to study in more detail the process of polarization of electromagnetic waves, it makes sense to read the article “Polarization of electromagnetic waves” on

Already in 1929, it was clear how to control the light to reduce glare. The founder of Polaroid Corporation was the first in the world to invent polarizing lenses for sunglasses. Today, almost all polaroid brand sunglasses come with a polarizing lens filter.

Who Cares About Polarization in Sunglasses

Many people liked the polarizing lenses in sunglasses; a very strong effect is noticeable for those who spend a lot of time on the water. Glasses with a polarizing filter are very fond of people who are fond of fishing. It is the waves on the water that create a huge amount of blinding glare that polarizing lenses in sunglasses can do perfectly.

Also, everyone who drives a car can remember the blinding effect of wet asphalt in sunny weather, etc. So many motorists use polarizing glasses to drive a car, and they really like these glasses.

Where to Buy Polarizing Glasses

To exclude the purchase of fake polarized glasses (of which there are many on the Internet), try to buy sunglasses in trusted online stores.

Where to Buy Original Polarized Glasses

In Amazon. In this online store, there is a large selection of best-polarized glasses that will be found, and they do not sell fakes.

Where to Buy Fake Polarized Glasses

If you purposefully want to buy a fake, then the indisputable leader in this matter is the Amazon website. There is a huge selection of fake sunglasses on the Amazon website, and you can choose from more than 30,000 models. For example, fakes of sunglasses of the famous Ray-Ban brand on Amazon and free delivery by mail.

Advantages and Disadvantages of Polarized Glasses

The price of high-quality polarizing glasses can be very high, and it makes no sense to buy cheap fakes. Let’s figure out whether it is worth paying a high price for glasses with a similar filter, or is it better to buy ordinary sunglasses with a UV filter.

It is worth noting that, along with the advantages, polarizing glasses have a number of disadvantages that can cross out all the usefulness. Some people using polarized glasses complain of persistent headaches. Is this related to wearing polarizing glasses or not? Without a medical examination and examination of such glasses, it is impossible to understand the causes of headaches.

About all the other usefulness of polarizing glasses, read on.

Benefits of Polarized Glasses

  • glasses with polarization perfectly remove glare and reduce the light intensity;
  • when using glasses with polarization, the contrast increases;
  • polarized glasses reduce eye fatigue;
  • glasses with polarization are simply irreplaceable for certain types of activities (driving a car, fishing, skiing, etc.);
  • glasses with a polarizing filter are recommended for people with light hypersensitivity.

Disadvantages of Polarized Glasses

  • the price of glasses with polarization is much higher than conventional sunscreens;
  • polarizing glasses reduce the readability of road signs (weaken reflected light), sidelights and brake lights;
  • glasses with polarization make it difficult to view information (darken the image) on the liquid crystal display (mobile phone with LCD display, GPS navigator, tablet, etc.).

Two Simple Ways to Detect the Presence of a Polarizing Filter in Sunglasses

It should be remembered that a polarizing filter is a thin film that is contained in the lens of your glasses, depending on the quality of the lenses in your glasses, the filter service life also depends.

For example, the polarization layer (polarizing film, polarizing filter) in the original glass lenses of ray ban glasses is sealed between two external lenses (more about ray ban lenses), such a filter serves throughout the life of the glasses.

Oakley’s patented polycarbonate lenses have a polarization filter at the molecular level of polycarbonate (in fact, the entire lens is a thick polarizing film). Inexpensive Polaroid glasses also have their own polarized lens manufacturing technology, about polaroid lenses, read the link.

In fakes of famous brands and cheap glasses, they use a filter in the form of a thin film on the surface of the lens, which erases with time, and the polarizing effect disappears. Try to buy glasses in trusted online stores that sell original products.

It is very easy to determine the presence of a polarizing filter in the lenses when buying sunglasses! There are two easy ways to do this.

1. The first polarization filter test

Before buying, ask the seller for another pair of polarized glasses and align their lens to lens. Next, rotate some glasses 90 degrees relative to others and look at the clearance (the axis of rotation should pass through the centers of the lenses). If the glasses are polarized, then the gap in the lenses will become dark. If simple glasses, then nothing will change.

2. Second polarization filter test

Take polarized glasses, look at any liquid crystal monitor (cell phone display or payment terminal monitor) and rotate the glasses 90 degrees relative to the monitor. If the lenses of the glasses have a filter, the image will darken or become completely dark. If the glasses are simple, then nothing will change.

One small remark, this test works exclusively with LCD screens.

Where Else Use Polarizing Filters?

The use of polarizing light and polarizing filters in everyday life is much wider than just using in sunglasses. Here are some everyday examples that many people use at home and do not think about the fact that this is polarization.

3D glasses

3D glasses for watching movies with the 3D effect, work on the polarization separation of the image. Everything works very simply, the visible image (on the TV screen) is divided into stereo pairs (into two separate images) that have different polarizations (for example, the left image has vertical polarization, and the right image is horizontal).

3D glasses also have two lenses with different polarization (for example, the right lens has vertical polarization and the left horizontal). Each eye sees its own image, and the brain combines it all together and creates the illusion of volume.

Polarizing filters for cameras

Polarizing filters for cameras is the filter consists of 2 rings; in one of them, there is a polarizing filter by rotating which you adjust the degree of polarization. It works just like in sunglasses, and your pictures will be more saturated. For example, if you are shooting a landscape, then the clouds will stand out more against the background of the blue sky, and the vegetation will look more juicy.

Video How to Check Polarized Glasses

Watch a short video, and everything will become clear. This polarization test works exclusively with LCD screens. Everything is extremely simple!


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