Sunglasses with polarized lenses take away the horizontal glare of sunlight, such as glare coming from the surface of water, sunlight reflecting from the slopes or on a reflective surface such as glass. By removing this glare, vision becomes easier on the eyes and therefor reduces eyestrain.
When are polarized sunglasses useful?
If you find yourself outside in situations where glare is unavoidable, then a polarized lens is definitely recommended. For instance while driving, or when you are hitting the slopes, during sailing or fishing.
How do polarized sunglasses work?
The way polarized lenses work, is they block light rays that would normally enter your eyes after being reflected from a shiny surface. The light that enters your eye after passing through a polarized lens has been filtered, allowing for more comfort, less eye strain and an increase in contrast.
The benefits of polarized sunglasses
- Less glare, less chance of being blinded by the sun.
- 100% UVA and UVB protection.
- Clearer color perception.
- Increased contrast.
- Reduces eyestrain.
Why does my screen turn black when I wear polarized sunglasses?
Some products have a polarizing effect, such as the screen of your smartphone, laptop or car navigation. When you look at these screens with polarized sunglasses, you have a “double” polarization function, which could make the image darker.
Newer smartphones are not bothered by this, because they diffuse light in a different way so that you can still view the screen sharp and clear.