The History of SunglassesWritten by Tim Gorman
Did you think that sunglasses were always used to protect our eyes from sun? Well if you did, you are most certainly mistaken. The first reason why they darkened glasses was because of smoke tinting, which was held in China before 1430. It was so far back in time, that of coarse their glasses were not of any prescription, and they were not used to protect your eyes from sun. The Chinese judges had often worn sunglasses with quartz to hide expression in their eyes while during a court case.
It was only until actual year of 1430 that prescription sunglasses came about in China from fair country of Italy. The sunglasses from Italy were also obviously darkened, but they were darkened for court cases as well.
The experimentation of tinting lenses came from a man named James Ayscough in 18th Century. He as well, did not seek sunglasses as protecting your eyes from rays of sun, but for correction of vision impairments.
Sunglasses: Which Lens to PickWritten by Tim Gorman
Believe it or not, sunglasses come with many different lenses, which will offer you different kinds of protection. Your local eye doctor can help you pick out a lens that would be best for you to protect your eyes from different harmful elements such as suns UV rays.
One of lens options is called a Blue-Blocker. These lenses do just as they say. They block any sort of blue light. Usually Blue Blocker sunglasses will come in an amber colored lens. It is not sure whether blue light is harmful or not, so these sunglasses are not imperative to your eye safety, but they are always great to have around!
There are other lenses called Mirror-coated lenses. This kind of lens will limit amount of light that goes into your eyes. This is a lens that is designed more so for comfort.
If you get sunglasses with a Gradient Lens, you will find yourself with a pair of sunglasses that are tinted all way from top to bottom. The top of lens is darkest, and middle has a clear look to it, while going back to darkest shade at bottom of lens again. It would be wise so that you did not drive while wearing a Gradient lens.