Sunglasses- Purpose and Design
Sunglasses be becoming more and more democratic these days. When picking a pair of sunglasses, the ones which have cool looking at and famous brands atomic number 18 the most attracting ones to consumers. People tend to proffer the real functions one pair of sunglasses can provide. A good pair of sunglasses should have these qualities:
1. Provide security from ultraviolet rays in sun unclouded. Good sunglasses can fall out UV rays completely.
2. Provide protection from intense light.
3. Sunglasses provide protection from gl be. Good sunglasses can completely use up glare using polarization.
4. Sunglasses eliminate special(prenominal) frequencies of light. accredited frequencies of light can blur vision, and others can enhance contrast. Choosing the decline color for your sunglasses lets them work better in specific situations.
Intensity Reduction
The smart or intensity of light is measured in lumens. For example, when you are indoors, most artificial light is around cd to 600 lumens. If you go outside on a sunny day, the brightness ranges from about 1,000 lumens in the shade to more than 6,000 lumens on a large stretch of concrete, like a highway. Our eyes are comfortable until we get to around 3,500 lumens.
When the brightness of the direct or reflected light gets to about 4,000 lumens, our eyes begin to have worry absorbing the light. What we see when we try to look at these brighter areas are flashes of white -- this is glare. To reduce the discomfort beard by the amount of light entering our eyes, we squint. Once you get to around 10,000 lumens, your eyes are so bombarded that they begin to completely block out the light. elongated exposure to light of such intensity can cause damage resulting in temporary or even unchanging blindness. Normally, a good pair of sunglasses adopts two ways...
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