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How To Do Polarized Test Sunglasses In Easy Steps?

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Typically, when sunlight waves fall on a surface, they create a glare or a flash. If you struggle with a lot of light even when wearing sunglasses, it can be a problem. In this case, you’ll need polarized sunglasses to protect your eyes.

These type of glasses have been injected with a chemical solution which effectively filters the intense light waves. Consequently, only soft waves will pass through the glasses, thereby protecting your eyes from full glare.

Are all sunglasses polarized? The answer to this question is affirmative No. How do you figure out if your sunglasses are polarized? We shall explore how to test sunglasses for polarization. Keep reading.

Basic facts

Before you start the test, it’s important to know that Polarized glasses are not darker than the normal sun-glasses. It’s just a misconception since they are available in other colors such as blue and fuchsia. The reality is than any color will have the same performance regardless of the angle you’re looking at.

Additionally, during the test, the type of lenses doesn’t matter as this involves only the lenses. These are not luxury like glasses which are worn for fashion. They are meant to help individuals deal with light intensity.

They function by reducing the strain that occurs to eyes as you look at the bright light and hence suitable if you spend a lot of time outside. Quite often, some activities such as biking, running, or fishing might expose your eyes to a lot of glare. For instance, the sea waves can reflect light, and this might block your view.

Polarized glasses help you to track the fish even when there’s a reflection of light. For runners, the sun might shimmer on the tarmac and reflect on your eyes. For you to see what lies ahead, polarized sunglasses will do the trick and offer you comfort on the track.

Test with one pair of glasses

If you have a single pair of sunglasses, it is fairly easy to conduct the polarized test.

  • Put your glass on and look at it towards a reflective source of light. The best source can be glass, polished metal, or even glass.
  • The test involves observing the intensity of the light by tilting your head on either way at a 60 degrees angle. If the intensity increases, then the glasses are polarized. However, if there light remains the same, it means the glasses have an ordinary tint.

Do your polarized glasses have a sticker?

Normally, polarized glasses have a dark sticker when new. Some brands mark this label to ensure their products are authentic. However, the market is filled with all manner of imitations. You can do a quick test to determine the validity of the sticker before you part with your money.

  • Hold the glasses towards a light source and look through. The stick will get darker, with an increase in light intensity. In this way, you’ll know that the shades you’re about to buy are polarized.

Use two pairs of sunglasses and compare

You can use your polarized pair of sunglasses to test whether a new pair of glasses is polarized or not.

  • Hold each pair with either hand one being in front of the other.
  • Rotate the pair on your right hand to the right.
  • Keenly observe how the lenses are blending to black color.
  • Also, look closer especially on the overlapping pair of sunglasses. When you look straight on, the glasses will appear darker. But if the new one is not polarized, there won’t be any different. If both are polarized, they should blend perfectly.

It’s worth noting that this test will only work when you have another pair of polarized glasses. For better results, place the glasses outside under direct sunshine.

Additionally, ensure the surface is flat and if at night, use overhead lights or light from a lamp or torch.

For more satisfactory results, try rotating the lenses by about 60 degrees, but ensure they’re in a similar alignment.

Use a digital display

You can use an LED display from a variety of devices to test whether your shades are polarized. Typically, these digital devices are equipped with anti-glare technology which is also present in polarized glasses. For instance, you can use a phone, computer, GPS, tablet or laptop.

  • For starters, turn on your computer and adjust the lighting to brightest. A brighter screen, especially a white page, will reflect more light and give better results.
  • Next, place your pair of shades facing the display source and observe the intensity of the light. Initially, the display will start to dim.
  • Then, move your head a bit and observe if the display turns black. When this happens, then it’s true, your glasses are polarized.

You can also wear glasses and face the computer screen and move your head a bit. If your glasses are polarized, your computer screen will be dark, thanks to the anti-glare. There will be a canceling effect since both your screen and the shades have the anti-glare characteristics.

Use bright light from a torch or a car’s headlight

You can use a torch or a bright light source to test if the sunglasses are polarized.

  • This method involves reflecting the torchlight on a reflective surface such as a mirror or a shiny surface.
  • If the sunglasses turn darker, then they are polarized.
  • But if they maintain the same tint, it means they’re just shades.
  • Also, you can look over reflective overhead lights from vehicles and observe the glare. If the sunglasses are polarized, the glare will gradually fade. When you look at the lenses, you’ll realize that it becomes dark, and eventually, you’ll not see the glare.
  • Next, remove the glasses, and you’ll note the glare from the light is still shinning.
  • After that, return the glasses, and you’ll not find the glare.
  • Repeat this step again to test the degree of your sunglasses polarization.


Polarized sunglasses can boost your comfort while out in the sun. However, with so many luxury shades available on the market, it can be hard to tell the difference. Luckily by running the above simple tests, you can easily tell if your glasses are polarized.

If your sunglasses are not polarized, you can seek advice from your optician to get a suitable pair. Normally, eye doctors run tests to determine the best prescription.

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