Sunglasses Offer Protection from UV Rays

Sunglasses protect the wear for harmful ultraviolet rays.

Sunglasses protect the wear for harmful ultraviolet rays. It is important to purchase sunglasses that are guaranteed to protect against UV rays. Lenses that are simple dark but offer little to no UV protection can actually harm one's eyes. The dimmer light created from the dark glass causes the pupils to dilate, thus permitting more UV rays to enter the eye. In the United States, sunglasses vary widely for protection they offer from ultraviolet radiation. Usually a peel-off label will indicate its UV rating. 100% is the best rating, or percentage of ultraviolet rays blocked by the sunglasses. If there is no information offered by the manufacturer, then the sunglasses probably do not offer any protection from UV rays. In the European Union, a CE mark will indicate sunglasses that meet the quality regulations for blocking harmful UV rays. During a solar eclipse, it is unsafe to looking at the sun only through sunglasses.

The color of the lens for sunglasses varies with the latest fashion style. However, the three most common colors are green, grey, or brown. When choosing your sunglasses it is recommended to avoid colors that cause color distortion, these colors can create hazards when driving a car. The following is a list of common lens colors and their benefits: Grey- does not enhance contrast or distort colors. Brown and green- cause some minimal color distortion but has contrast-enhancing properties.  Red- good for medium and lower light conditions. Orange and yellow- the best contrast enhancement and depth perception.  Blue and purple- offer no real benefits. Some sunglasses have mirrored coatings on the outer surface, which reflects some of the light making them useful in bright conditions. These are typically referred to as mirror shades.

Other forms of sunglasses have polarized lenses, which reduce glare caused from light reflecting off of polarizing surfaces such as water, skylight.






 

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