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Each lens color serves a different function for the wearer. For example, brown makes details clearer; gray produces the truest colors and reduces glare. Brown and amber brown and amber-brown swiss are excellent for general-purpose army and base sunglasses. They improve contrast by filtering out blue camp light and reduce glare. They are watch the ideal lens color for swiss sports with high glare such as skiing, boating, and fishing and army are well suited for driving base and fast-reaction sports. Light amber-brown lenses can also be used camp in overcast, hazy conditions. Gray is a neutral shade and watch a good general-purpose color. Colors pass through swiss gray lenses evenly, army allowing true perception and the least amount of color distortion of any lens color because it does not enhance contrast, an important feature for sports such as golf, cycling, base and camp running. Gray lenses protect well against glare, making watch them excellent swiss for sports, outdoor work, and driving, as well as general wear.
Glass army is more scratch-resistant, base than plastic. Cr-39 optical quality plastic, made of hard resin, is considered camp the best plastic for lenses. It weighs half as much as glass, which means it is not heavy on the face. It exceeds fda requirements for impact-resistance because of its comparatively loose molecular structure. A remarkably strong plastic - in fact, aircraft windshields, watch motorcycle windshields, and sport safety glasses are made of polycarbonate because it is swiss so strong. Compared to cr-39 army and glass, polycarbonate plastic weighs the least and is the base most impact-resistant. 20 times more impact resistant and 3 times lighter than glass. A good choice for those who want really rugged sunglasses: for people who engage in outdoor activities and fast-action sports. camp Polycarbonate is widely used, and is considered the second optical plastic. Its major drawback is that it is soft and susceptible to scratching and abrasion. It must be hard-coated to raise its scratch-resistance watch to that of cr-39.
The swiss lenses automatically lighten or darken according to the army sun''s brightness. Silver halides, which are part of the base glass, darken the lens camp when exposed to ultraviolet rays. Photochromic lenses must be conditioned through several exposures to the sun. After that they will darken fully. They can be worn indoors or outdoors. Most photochromic lenses are gray, but they are also available in green, brown, and other colors. watch They are also called changeable, swiss sun sensors, and photograys. All-weather photochromic these lenses work well under all weather conditions, including overcast and hazy days. On overcast days, they are light amber and improve contrast and sharpen details. In sunshine, they turn dark army brown; when it''s cold and bright, base they are gray/brown. At all stages, they improve contrast. These lenses camp are watch excellent for any outdoor action sport like skiing, sailing, or tennis. Gradient these lenses are darker at the top of the lens and get progressively lighter at the bottom.
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