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A pair of sunglasses, at first glance, may appear to be
simple. It is merely two pieces of colored glass
or plastic secured in some
type of plastic or metal frame. That seems basic enough. As it turns out,
there
are a number of different things that you can do with these two pieces of glass
or plastic that
could result in a significant effect to you when you wear these
lenses. Read on further to learn why
there really is a difference in the
sunglasses that you can get and why you need to be informed to
make the right
decisions about your eye and vision care.
When we simmer it down, there are four characteristics that
a high quality pair of sunglasses should
provide for you. First, sunglasses can offer a safeguard against
ultraviolet rays of the sun. Ultraviolet
(UV) light can damage the cornea as
well as the retina. Good quality sunglasses can filter out the UV
rays and
provide valuable eye protection. That is why many baseball players always use
polarized
sunglasses
Next, sunglasses can offer a defense from intense, powerful sunlight.
When the eye receives too much
light it naturally reacts by closing the iris to
limit the amount of light hitting the retina. Once the iris has
been restricted
it only leaves squinting as a means to further control the onslaught of strong
sunlight.
When there remains powerful ambient light as occurs on a clear,
cloudless day, the result can be harm
to the eye. A good quality pair of
sunglasses can block the incoming light by as much as 97% thus
protecting our
vision.
Sunglasses offer protection from glare. Certain relatively
flat surfaces, such as snow or standing water
or even roadways, can be the
cause of reflected light. The reflected glare can cause bright spots in
your vision ranging
from merely disturbing and annoying to outright dangerous by concealing objects
in your field of view. Polarized sunglasses can virtually eliminate this type
of glare. And lastly, sunglasses are effective in removing particular
frequencies of light from striking our eyes.
In some circumstances, certain
frequencies of the visible and invisible light spectrum could blur your
vision
or even affect contrast. Choosing the right color for your sunglass lenses can
go a long way to
counteract these negative aspects of light optics.
If you are looking to purchase a pair of cheap sunglasses
you are reminded that you usually give up all
of the advantages listed above
and you could be doing damage to your eyesight. For example, if your sunglasses
provide no UV protection and are just colored lens, you increase your exposure
to UV
rays. Cheap sunglasses work to limit some of the light reaching your eye
causing your iris to open
wider to let in more light. This, in turn, allows
more UV light to reach your retina ultimately increasing
the potential for
damage to your eyesight.
Choose wisely and protect your eyes. Buying the right pair
of high quality sunglasses will give you
years of unsurpassed eye protection and
vision performance enhancement.
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