Polarized sunglasses are very popular because they reduce glare and protect the eyes from the sun. However, the price is also more expensive than ordinary glasses so you should get really good quality. You can test the anti-glare technology of polarized glasses by looking at a reflective surface, comparing two sunglasses, or wearing a computer screen.
Step
Method 1 of 3: Testing Reflective Surfaces
Step 1. Find a reflective surface that causes glare when exposed to light
You can use a table glass, mirror, or other shiny flat surface. Make sure the glare is clearly visible from a distance of approximately 60-90 cm.
If you're generating glare, you can turn on a room light, or shine a flashlight on a reflective surface
Step 2. Hold the sunglasses 15-20 cm from the front of the eye
You will be able to see the surface through one lens at a time. Depending on the size of the lenses of your glasses, you can move them closer to your face.
Step 3. Rotate the sunglasses to a 60 degree angle
The sunglasses will be slightly angled at this point, with one of the lenses slightly raised from the other. Since the sunglasses are polarized in a certain direction, rotate the sunglasses to make the polarization more effective.
Depending on how the glare hits the surface, you may need to adjust the angle of your glasses to see a drastic difference
Step 4. Look through the lens and check the level of glare
If the sunglasses are polarized, you will see the glare disappear. When you look through one of the lenses, it should appear very dark with no glare, but there is still visible light shining on the surface.
Move the sunglasses to compare visibility to what is seen through the sunglasses several times if you are still in doubt about the effectiveness of polarization
Method 2 of 3: Comparing Two Pairs of Sunglasses
Step 1. Prepare sunglasses that have been confirmed to be polarized
If you already have polarized glasses, or keep them with some other polarized sunglasses, do a comparison test. This test is only effective with other polarized glasses.
Step 2. Hold the polarized sunglasses face to face in front of the other glasses
Align the lenses at eye level, and make sure the two are about 2.5-5 cm apart. It is recommended that the sunglasses being tested are close to you, and the test sunglasses a little further away.
Make sure the lenses don't touch each other as this could scratch the coating
Step 3. Position the sunglasses in front of a bright light for a more dramatic result
This step will help make testing easier, especially if this is your first time comparing glasses. This light will make the shadows clearer.
You can use natural light from a window or artificial light from a room lamp or reading lamp
Step 4. Rotate the glasses under test by 60 degrees
One lens must be diagonal from the other, and the position of the polarized sunglasses must not change. Only one lens is aligned with the other glasses.
You can freely determine the direction of rotation of the sunglasses but make sure both glasses are held firmly
Step 5. Look for the overlapping parts of the lens to see if they are darker in color
When the two glasses are polarized, the overlapping lenses appear darker when viewed straight. If the glasses are not polarized, there is no visible discoloration.
You can compare overlapping lenses to non-overlapping lens colors
Method 3 of 3: Using a Computer Screen
Step 1. Turn on the computer screen to the brightest setting
Most electronic devices have anti-glare technology such as polarized glasses. You can test the polarization of the glasses by looking at the screen.
Open the white screen to get the brightest view of the computer screen for more effective testing
Step 2. Put on the sunglasses
In front of the computer screen, wear sunglasses as usual. Make sure you are sitting directly in front of the computer screen.
We recommend raising the computer screen to eye level if not appropriate
Step 3. Tilt your head 60 degrees to the left or right
While in front of the screen, tilt your head to the left or right of your body. If the glasses are polarized, the screen will appear black thanks to the anti-glare canceling technology.
