Polarized Sunglasses

By Author: James Leonard
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What are Polarized Sunglasses?

Polarized lenses are specially coated lenses that are designed for a specific purpose- to reduce glare. The glare which is caused when sunlight is reflected off from flat surfaces like water or land and hits your eyes leaving your vision distorted. Not just this, but this glare is also disturbing to your eyes and makes you blind for a few seconds, reducing the depth perception. And regular sunglasses are not enough to fight too much of this brightness, so polarized sunglasses are recommended.

Unlike regular fashion sunglasses that only reduce the amount of glare reflecting in your eyes, the polarized sunglasses work by absorbing the horizontal light waves with the help of their special chemical coating. This enables you to see clear and without any discomfort.

How Do Polarized Lenses Work?

Light usually scatters in all directions; but when it's reflected from flat surfaces, it tends to become polarized — meaning it travels in a more uniform (usually horizontal) direction. This creates an annoying and sometimes dangerous intensity of reflected ...
... light that causes glare and reduces visibility.

Polarized lenses contain a special filter that blocks this type of intense reflected light, reducing glare.
Though polarized sunglasses improve comfort and visibility, you will encounter some instances when these lenses may not be advisable. One example is downhill skiing, where you don't want to block light reflecting off icy patches because this alerts skiers to hazards they are approaching.

In addition, polarized lenses may reduce the visibility of images produced by liquid crystal displays (LCDs) or light-emitting diode displays (LEDs) found on the dashboards of some cars or in other places such as the digital screens on automatic teller machines and self-service gas pumps.

With polarized lenses, you also may be unable to see your cell phone or GPS device.

Boaters and pilots also have reported similar problems when viewing LCD displays on instrument panels, which can be a crucial issue when it comes to making split-second decisions based strictly on information displayed on a panel. (Some manufacturers of these devices have changed their products to solve the problem, but many have not yet done so.)

However, for most other sports and activities, polarized sunglasses offer great advantages. And today, many polarized lenses are available in combination with other features that can enhance outdoor experiences.
Polarized bifocal sunglasses or progressive lenses are examples of options for the presbyope who also likes outdoor sports.
And polarized photochromic lenses, which change from dark outside to light inside, may be right for the light-sensitive person who frequently is in and out of the sun on any given day.

Whether you spend your time waterskiing or boating, in-line skating or mountain biking, driving or jogging, polarized sunglasses may be the right choice to help you enjoy your life outdoors.
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