Sunglasses Cheap

Such lenses can be worn to block ultraviolet and infrared, while the color of the external environment does not change, only the change in intensity of light, as if cloudy, there is cool and comfortable feeling. Strong sunlight contains large amounts of ultraviolet and infrared, may damage the cornea of the eye, lens, and even the eyes, wearing a pair of Tiffany and Co Charm Bracelet Jewelry Outlet sunglasses that can block or absorb part of the light, reducing eye irritation. In recent years, because of our emphasis on health, many people go out in the hot summer months, like wear sunglasses to reduce the sun's stimulus, it was also like to use it as decoration, many types of sunglasses, should be based on different need to choose.
Color sunglasses mainly the absorption of light itself to achieve the purpose of reducing the intensity of sunlight. Adding different colored glass compound, made of different colors of sunglasses, they absorb wavelengths of light are not the same. Coating sunglasses are coated with a layer of metal film on glass lenses, lens reflex rely on sunlight to protect the eyes. Color glasses indoors are usually colorless, transparent, and exposure to the sun, will soon turn gray or other colors. The color of the Tiffany and Co Necklace Jewelry Outlet Store glasses can automatically darken or lighten with the strength of the sun. This is because the mirror of adding a small amount of silver halide film as a photosensitive agent, trace copper as sensitizer sake. This automatically adjusts the brightness of the lens, can be made with prescription wear corrective lenses, suitable for use in patients with myopia and hyperopic. Since then a large degree, differences between center and edge thickness, glasses differ greatly the color shades.
Plastic lenses coated with a certain color, have anti-UV effect, but anti-infrared poor performance. From the perspective of cool, it is better to glass lenses, summer wear inappropriate. Crystal lens can not block infrared and ultraviolet light. Color performance is not as crystal lens glass lenses. Some say crystal lens does not hurt the eyes, keep a cool head, which is unfounded. Long-term human life in the sun, the eyes have adapted to the surrounding environment, the daily lives without protection. Often work outdoors, wear a pair of Fake Oakleys Frogskins Sunglasses Cheap for Sale sunglasses is beneficial, but should be selected according to the nature of the work environment. The sunglasses as decorations, regardless of the occasion locations, such as at dusk or at night, or report to the party, still wearing sunglasses, not only uncivilized manners, but also increase the burden on the eyes, but not conducive to eye care.
At least three countries have claimed that they first invented the glasses. Spanish missionaries brought the book mentioned that they had glasses from China, but unfortunately there is no physical permit. There is another one that Eskimos use of wooden goggles, in fact, a long strip of wood, draws the top two slits, which obviously can not be considered sunglasses. Credible modern Europeans invented Cheap Mac Cosmetics Makeup wholesale Outlet sunglasses. Industrial Revolution has begun, glass manufacturing and precision metal machining maturing. Then eyewear manufacturer mainly small workshop, hand-made, but also marked with the manufacturer's name on each glasses. Many of these small workshops in the house later became a manufacturer of precision instruments and watches manufacturers.