| When sunglasses were first invented they
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| | the sun and get rid of all reflections?
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| were not to help protect your eyes or
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| | No, these sun glasses eliminate parts of
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| even for their good looks. They were
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| | the reflective light and thus reduce the
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| actually invented so a roman emperor
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| | glare.
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| could watch gladiators. Another early use
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| | Should people who like to fish think
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| of sunglasses was for interrogations in
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| | about purchasing polarized glasses?
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| China over 500 years ago. Also, judges in
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| | Reflective surfaces, like the water,
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| China wanted to hide their facial
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| | reflect a great deal of light, and thus
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| expressions so they would wear shades so
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| | the bright spots can distract the
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| the witnesses could not see their
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| | fisherman or even hide objects, like the
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| reactions.
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| | fish. Good sunglasses will eliminate the
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| In the 18th century sunglasses saw a
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| | glare with polarization. Natural or
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| change. James Ayscough began
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| | artificial light can polarize. Anytime
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| experimenting with tinted lenses in
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| | you look at a lake or river, you are
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| spectacles. When Sam Foster introduced
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| | seeing naturally polarized light. The
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| the shades to America in 1929, they
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| | reflected glare off the water is the
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| became an instant hit.
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| | light that doesn't make it through the
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| Different from their predecessors, these
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| | "filter" of the water, and thus you
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| glasses were designed to protect their
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| | cannot see anything below the surface,
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| wearer's eyes from the sun. Lens
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| | even when the water is clear.
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| polarization soon followed thanks to
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| | Polarized light results from light
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| Edwin Land who utilized his panted
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| | striking the surface of the water
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| Polaroid filter to make sunglasses.
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| | horizontally. Fishermen wear polarized
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| Sunglasses sure came a long way from the
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| | lenses that allow vertically polarized
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| Roman and Chinese roots.
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| | light to enter, and thus he can see into
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| So what is the Big Deal about Polarized
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| | the water and spot fish and structure.
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| Glasses?
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| | How do polarized sun glasses and normal
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| Upon striking the water or any reflective
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| | sun glasses differ?
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| surface, light becomes polarized. Nearly
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| | It is important to buy glasses that you
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| all of the light waves in polarized light
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| | feel comfortable with. You should not
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| move in one plane. Normal light waves
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| | purchase polarized glasses just because
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| move in many planes, while polarized
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| | they say they are better. But the truth
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| lenses allow only light in one plane to
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| | is that normal sunglasses merely decrease
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| pass through the lens. Thus polarized
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| | the intensity of all light passing
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| glasses nearly eliminate the glare.
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| | through their lenses. Polarized light
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| Although sunlight is not polarized,
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| | also decreases light, but it does so
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| water's surface reflects and transmits
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| | selectively. Thus the polarized lenses
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| the separated components. The light
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| | selective eliminate the reflection from
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| literally breaks into the vertical and
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| | the light off the water's surface.
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| horizontal component, with the horizontal
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| | Polarized glasses are great for a variety
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| component reflected first. To nearly
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| | of outdoor sports and projects. They are
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| eliminate the glare, engineers designed a
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| | great in the winter, summer, fall, and
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| vertically polarized lens. The sun's
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| | spring. You really do not need to buy any
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| height also affects polarization.
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| | other sun glasses if you own a pair of
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| Fishermen often wear polarized glasses
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| | polarized sun glasses.
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| with filters to help block the light
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| | If you are interested in purchasing a
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| reflected by the water's surface. Thus
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| | pair of polarized sun glasses the
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| they can see under the surface of the
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| | Internet is a great source of
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| water.
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| | information. You may even find a few good
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| Can polarized glasses really work against
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| | sites to make your purchase from.
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