1. What Are Polarized Lenses For?
The miracle and beauty of the sun can be quickly forgotten when you are temporarily blinded by its glare. Having a bright shaft of sunlight hit you directly in the eyes is both annoying and potentially dangerous.
Usually light scatters because it bounces at varying angles off an object’s uneven surface. But if the surface is smooth, as with calm water or a flat piece of sheet metal, light reflects at one angle—such as right in your eyes. This is what we know as glare.
Fortunately, today’s sunglasses—with or without prescription—can be modified with a technique called polarization to reduce light glare and improve vision and safety in the sun.
2. How Polarized Lenses Work
Polarized lenses have a special chemical applied to them to filter light. The chemical’s molecules are lined up specifically to block some of the light from passing through the lens. On polarized sunglasses, the filter creates horizontal openings for light. This means that only light rays that approach your eyes horizontally can fit through those openings.
As a result, the image you see with polarized lenses is a bit darker than usual, but objects look crisper and clearer, and details are easier to see. People who use polarized sunglasses for long stretches of time often say they are less tired than usual after hours of battling sun glare. People who fish, in particular, find polarized sunglasses drastically cut the glare and help them see into the water.
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3. The Benifits Of Polarised Lens
Reducing glare can ease the eye strain drivers feel from long hours on the road.
Fishermen can often see under the surface of water using the lenses, which helps them to see fish or other objects.
Photographers use polarising filters on camera lenses to enrich the images they capture by giving them more contrast, and to increase the range of effects they can produce.
In addition to blocking blinding glare, polarised lenses can also help you to see better by improving contrast and visual comfort and acuity.