3 Scientific Things Need To Be Done With Man And Women When They Put Sunglasses.

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Have you ever wondered just what sunglasses do for your eyes, and how? It’s a little more complex than just dropping a dark filter over your vision.

1.Different colours actually serve different purposes

• Yellow and amber lenses are ideal for outdoor sports,as they filter out blue light,improving contrast and depth perception.

• Rose and purple lenses increase contrast of objects against a blue or green background, which makes them great for sea beach or water skiing.

• Sunglasses with gray, black, or green lenses have the added benefit of filtering out blue light which make good for driving car or motorcycle.

2. Glare Elimination With Polarized Lenses

Glare is difficulty seeing in the presence of bright light such as direct or reflected sunlight or artificial light such as car head lamps at night. Polarized lenses are particularly effective at getting rid of glare. A quick way to tell whether lenses are polarized or not is to hold them up to a light source and slowly rotate them to see if the light coming through changes.

3. Cheap Sunglasses Are Dangerous

A cheap pair of sunglasses might look cool but you could actually be putting your eyes in more danger.You might think that as long as the sunglasses are dark enough, you’ll be fine from eye-damaging uv rays radiation. Uv protection is one way you get what you pay for.Prescription sunglasses have it, and you can check the labels of non-prescription pairs to make sure they do. Only buy sunglasses that offer 99 to 100 percent uv protection or up to 400nm uv protection.

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