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Some rays can be damaging. Others affect how well and comfortably we see. Of concern are visible rays and invisible ultraviolet (uv) and infrared rays. The fine quality lenses sold at sunglass hut are designed to filter out these damaging and vision-distorting parts of sunlight for optimum clarity and safety. Blue light (the shorter wavelengths) focuses imperfectly on the retina. This creates a phenomenon called "blue blur." also, veiling glare occurs when blue light scatters off dust and moisture in the air even on clear days, interfering with visibility. Haze, fog, rain, and snow intensify these effects. watchesforsale Infrared infrared watchesforsale (ir) rays are long wavelength rays sometimes called "heat waves." watchesforsale half of the sun''s energy is infrared. Ir is stronger at high altitudes. Electric heaters, house radiators, and ordinary light bulbs also emit infrared energy. The watchesforsale rays cause the skin to feel hot and may contribute to the discomfort caused by exposure to bright light.

Each lens color serves a different function for the wearer. For example, watchesforsale brown makes details clearer; gray produces the truest colors and reduces glare. Brown and amber brown and amber-brown are excellent for general-purpose sunglasses. They improve contrast by filtering out blue light and reduce glare. They are the ideal lens color for sports with high glare such as skiing, boating, and fishing and are well suited for driving and fast-reaction sports. Light amber-brown lenses can also be used in overcast, hazy conditions. Gray is a neutral shade and a good general-purpose color. Colors pass through gray lenses evenly, 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, and running. Gray lenses protect well against glare, making them excellent for sports, outdoor work, and driving, as well as general wear.

The eye can only see white flashes, such as, light reflecting off car bumpers on watchesforsale a sunny day. It is so intense that it overwhelms the eye with blinding light, masking what is behind the glare. It watchesforsale can seriously impair vision and create dangerous situations when driving, boating, or skiing. Long-term, it causes excessive wear and fatigue on the eyes. Your eyes we expect a lot from our eyes. During a normal day, the eyes will use about the same amount of energy as the legs would use in walking fifty miles. This and the additional burden of glare cause the eyes to strain to see well. Wearing sunglasses will reduce or eliminate this strain, cut the watchesforsale impact of harsh glare and eliminate the need to squint. Sunglasses also offer protection against something very serious - ultraviolet radiation (uv). Visual acuity, contrast, and overall sensitivity can be reduced by up to 50%, due to the sun’s sustained bleaching of the photochemical rhodopsin in the rods of the retina.

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