What you need to know about polarized sunglasses

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What You Need to Know About Polarized Sunglasses

Polarized sunglasses are specially designed to absorb reflective solar glare. Solar glare is
reflected from flat surfaces like snow, ice, standing water and even roadways. These glasses are
designed to absorb up to 97% of the glare from such surfaces. Polarized sunglasses are essential
safety equipment for sportsmen, boaters, fishermen, skiers, motorcyclists and even car drivers.
When sunlight is reflected off of water surfaces or white snow it can create a tremendous reflective
glare. That is why goggles optics is so important for safety. I’m sure you’ve even experienced the
annoying glare from long stretches of road while driving.

The human eye has a way of blocking out certain light optics using the iris and filter optics. It
naturally becomes smaller when you are in bright light and larger when you are in dim or low light.
Unfortunately the iris doesn’t respond well to bright glare from the sun reflecting in all directions.
The eye doesn’t know whether to adjust for more or less light. That is why polarized sunglasses
are so beneficial. It's true that you can see better with polarized sunglasses.

Edwin H. Land invented optics polarized around 1936. He recognized that ordinary light travels
in the form of waves that can vibrate in all directions. He understood that polarized light vibrates
in only one direction. Generally, surfaces that produce the worst glare have horizontally polarized
light. So by knowing these facts Mr. Land developed optical lens that allow the light to vibrate in
only one direction. The optical lens, or sun glass polarized, he invented are made to block out the
horizontal light vibration and reduce the glare.

Polarized lenses are now made with using synthetic plastic such as CR-39 or polycarbonate. To
this material a polarization filter is added. The filter is made of a material that allows the molecules
align vertically. Polarized sunglasses are great for keeping glare out of your eyes and also for
looking fashionable.

Typically, a good pair of polarized sunglasses is more expensive than non-polarized sunglasses.
But the money is well spent. Many sunglass dealers will sell cheap polarized sunglasses that are
nothing more than replicas of the originals. You can test polarized lens by rotating them in a particular
direction and seeing if the glare through the lens changes in its intensity in one direction and lessens
or disappears in the other direction. Be cautious of fake polarized sunglasses as they may in fact
damage your eyesight. It is always safer to invest a few more dollars in buying a genuine pair of
polarized sunglasses than subjecting your eyes to potential damage.

Polarized sunglasses are essential for anyone suffering from eye disorders who still want to enjoy
the wonders of the great outdoors. They are also a necessity for those of us not suffering from
eye ailments as a preventive measure. Polarized sunglasses have some distinct benefits for
outdoorsmen and sportsmen.

As with most benefits there are some drawbacks and limitations associated with polarized
sunglasses. For instance, when wearing polarized sunglasses you may not be able to fully see
certain relief features on a snowy surface. This is because the polarization process blocks
several of the light rays reflected back towards you. In some situations this can be dangerous
such as when walking over thin ice. Another issue with polarized sunglasses is that they make
most LCDs almost impossible to see as they seem invisible from certain angles. This occurs
because LCDs emit polarized light.

Polarized sunglass lens truly are an amazing technology. But because of their capabilities,
polarized sunglasses are typically priced higher than ordinary sunglasses. Cheaper varieties
can be found for around $25 and while the price of a reasonably good pair may go up to $300
or more depending on their name brand.

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