sun glasses are a visual auxiliary function

Sunglasses or sun glasses are a visual auxiliary function of lens color or dark, to prevent direct light into the eyes. It was called the sun. As we all know, most people find the sun light is not too bright, sometimes their eyes uncomfortable.
Medical experts and Department of Ophthalmology physicians strongly recommend wearing some kind of protection, to protect your eyes from ultraviolet rays can cause cataracts or some other eye problems. Color glasses has become popular among all ages and all its season, but summer time or at the beach wear them all the time more comfort. This is undoubtedly popular celebrities, models and working and nonworking men's fashion accessories.
The film lighting is usually better than natural light, you will often see a Hollywood star in a variety of colors and styles of high-quality brand-name sunglasses to protect his eyes.
Sam Forster first introduced the low-cost mass production in 1929 sunglasses. They first become polarized in 1936, when Edwin H. land began experimenting with his patented filter lens.
Often, it is often recommended to wear green, grey, yellow or brown lenses. Gray lenses is considered neutral, because they do not contrast enhancement or distort colors. Brown and green lenses will cause color distortion is minimized, but the contrast enhanced performance. Orange and yellow degree of depth perception optimal contrast enhancement, but cause color distortion. The contrast and depth perception attribute golfer and Sagittarius often use yellow.
Some people like to wear polarized as from water and fishing people often go, can see beneath the surface of the water is very important, in order to reduce glare.