The 6-base frame offers everyday coverage. Men's classic metal alloy aviator full-rim polarized sunglasses with gradient blue tint adjustable silicone nose pads and acetate temple tips for comfort. Taking a slightly cat eyed design the result is a stylish model with great lens coverage and solid frame construction, great for both mountain
When light reflects off certain surfaces, like water, it produces annoying glare. Certain glasses are able to filter that out. Here is how that works. The sun gives off a wide spectrum of electro-magnetic waves. By that we mean there are individual light rays or waves, of many wavelengths. We perceive the mixed rays of the visible part of the spectrum as white light. The arrows on the lower right are meant to show the light waves are oriented in random directions.
For the purpose of this discussion I am only showing one vertical wave, in blue, and one horizontal wave, in orange.
The color choice is only for illustration; the different colors could be oriented in any direction. When light bounces off certain objects, like water, the vertical waves, shown here in blue, are absorbed.
There is another way to polarize light. There exists lens material that, because if its internal structure, allows light waves to pass through, only if they are oriented in a particular direction. In this illustration the polarized lens is oriented so that it blocks the horizontal rays and allows only the vertical rays to pass. Your sunglasses work the same way. The first polarization comes about by reflection, usually from a horizontal surface, like water or a road surface, so the light has a horizontal orientation.
The polarizing material in your su nglasses is oriented vertically, so it blocks the horizontal waves and reduces glare. If your sunglasses were oriented in the other direction, they would let those waves through. By blocking out glare the lens provides a nice level of comfort without having to be as dark. Here is an example of two polarizing lenses laying in the same direction above left. The first lens is polarizing the light, letting through light waves of only one orientation.
The second lens has the same orientation, so it will also let those waves pass. Where they overlap things are a little darker, because of the double tinted lenses. But, if the second lens is oriented at 90 degrees above right , it will block the waves let through by the first lens. Now the area where they overlap is a lot darker. The magic of polarization. One unexpected problem with polarized lenses may be difficulty reading some LCD displays, like instruments for a pilot, or on some gas pumps.
Keep in mind that polarization does not block UV , so it is for comfort, not protection. Lastly we come to Ultra-Violet light. Here is the part of the spectrum we are interested in. On the left is Infra-Red , which has a long wavelength and is responsible for the warmth you feel from sunlight. The UV spectrum is divided into 3 regions.
The most energetic UV-C , is blocked by the atmosphere, so that is not a problem. UV-B is your friend in small doses, but not your friend, in large doses. But too much UV-B is potentially a direct cause of skin damage. It has been clearly shown that cumulative exposure to Ultra-Violet radiation causes damage to exposed skin in the form of tanning, sunburn, accelerated skin aging, and skin cancers. The skin of the eyelids develops cancer like any othe r area of the skin.
The exposed conjunctiva can form a scar-like pterygium , shown at the right, outlined by the white dashed line. The cornea can be affected. In the lens, U-V accelerates clouding, called cataract. There are experimental reasons to suspect possible retinal damage, but that link is hard to prove.
You want transparent materials, like glass, to allow the visible spectrum through, but block out as much of the UV as possible. Regular window glass transmits Infra-Red, visible light and most of the UV. That is why your photo-chromic lenses do not darken in the car.
The tempered side windows are not as protective, but the sun roof is pretty good. Common materials for eye-glasses include glass, standard CR plastic, and newer plastics, Polycarbonate and Trivex. This diagram shows how the different lens materials perform. The vertical scale shows the percent of transmittance, with the different wavelengths on the horizontal axis.
If the lenses are made out of glass or CR plastic, you should consider UV coating if you spend a significant amount of time outdoors. Here are general measures for UV protection. Wearing a hat will significantly decrease UV exposure to the face and eyes. Protect your skin with sunscreen and clothing. Most sunglasses used for common purposes have a grey tint.
This tint gives the wearer protection from sun glare and allows true color of objects to be seen. Brown lenses are also good for common purposes and work well in fluctuating light conditions. A brown tint filters some blue light and is a good choice when playing sports where judging distance is significant.
Most golfers prefer a brown tint. The curve of the G lens is very similar to the color sensitivity of the human eye. In other words, this tint helps the lens to emphasize colors our eyes see most easily. Yellow tints block blue light greater than a brown tint.
Yellow tints are preferential in conditions that are less than favorable e. Consumers who are skiers, airplane pilots and sport shooters may benefit from a yellow lens.
In a bright environment, the best protection for your eyes is an orange lens. A vermillion lens will reduce glare and amplify light. This tint is soothing to the eyes and cosmetically attractive. Some computer users or people who work in brightly lit offices may benefit from using a vermillion lens.
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Product Features thick lens design,oversized colorful tinted sunglasses for women men. Enjoy a Summer in style with a wide selection of the highest quality sunglasses for men, women and children at the lowest prices. Free Shipping on all orders! Tints have the ability to enhance vision in certain situations. Although you may admire a certain tint color, it may not be the best one for your particular lifestyle. Following is a .