If you need to produce glare, you can turn on overhead lights or shine a flashlight on a reflective surface.
Depending on how the glare is hitting the surface, you might have to slightly adjust the angle of the glasses to see a noticeable difference.
Move the sunglasses to compare your regular eyesight to what you see through the sunglasses a few times if you’re unsure of the effectiveness of the polarization.
Make sure the lenses don’t touch each other, as this can cause scratches on the coating.
You can use natural light coming in from a window or artificial light like overhead lighting or a lamp.
It doesn’t matter which way you rotate the sunglasses, but make sure you hold both pairs of lenses steady.
You can compare the overlapping lenses to the color of the lenses that aren’t overlapping.
Open a white screen, because the brightness will make the effect of the test more prominent.
It might be helpful to elevate your computer screen to eye level if it isn’t already positioned there.
If one side doesn’t work, try tilting your head to the other side. If that doesn’t work, the sunglasses are not polarized.
