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By : Choc Magazine   
Some Glasses Are Sun Glasses
However logical it may be to assume that sunglasses were invented by a desire to shield the eyes from the sun, early sunglasses served a special purpose and it wasn't to block the rays of the sun.
With frames made from metal, plastic or flexible nylon in colors and patterns that know no limit, and prescription lenses allowing everyone to wear them, sunglasses have come a long way and are a fashion accessory. One would think that sunglasses originated from the need to protect eyes from the sun. Well, think again.
The NOT sun glasses
Sunglasses have quite a colorful and interesting history that dates back as far as 60 AD when Emperor Nero liked watching gladiatorial combats through polished emerald-green gemstones that would reduce the sun’s glare. Centuries later, the purpose to darkening eyeglasses was so that Chinese judges could conceal their expressions in 12th Century Chinese courts. 
Sunglasses were then made out of lenses that were flat panes of smoky quartz. These so-called sunglasses could not correct vision, or protect from the sun, but did reduce glare. Chinese judges wore them to hide their facial expressions when they interrogated witnesses; a judge’s evaluation had to remain secret until a trial’s conclusion. 
Around 1430, vision-correcting eyeglasses were introduced into China from Italy, and they too, were darkened, still mainly for judicial use. Developed in China, smoke tinting technology was the first method of darkening eyeglasses. Sunglasses went through no further changes until 1750 when an English optician and designer and maker of scientific instruments James Ayscough concluded that blue-green-tinted glass could correct specific vision impairments.
The sunglass craze
It is thanks to Sam Foster who introduced sunglasses to America in 1929 that sunglasses actually saw the light. Foster sunglasses were designed to protect people’s eyes from the sun and he sold them on the beaches of Atlantic City, New Jersey. 
Sunglasses soon became a cultural phenomenon, and some people wore them at all times of the night and day - not just when it was sunny - they would even wear them indoors. The masses imitated celebrities such as the legendary Elvis Presley, and wearing sunglasses became "being cool."
What markedly catapulted the use of sunglasses was a clever 1960s' advertising campaign by the Foster Grant company “Who's That Behind Those Foster Grants®?” which featured iconic Hollywood celebrities such as Raquel Welch. The sunglass craze escalated in the ‘70s and a giant industry developed which only a few decades earlier didn’t exist.
Banning rays
In the mid 1930s, the U.S. army asked the optical firm Bausch & Lomb to produce highly efficient glasses that would protect their pilots from the dangers of high-altitude glare. In 1936 Ray Ban designed anti-glare aviator style sunglasses with a special dark-green tint using newly created polarized lens technology. And in 1937 these glasses were made available to the public as The Ray-Ban Aviator sunglasses. 
In the 50′s, the popular Ray-Ban Wayfarer was created. It was the first model with plastic frames that was made popular by actors and actresses in Hollywood. Also making a comeback later in the 80’s by pop music stars like Michael Jackson, Madonna and Blondie.
They can be beneficial to us too; tinted lenses protect our eyes from harmful ultra-violet rays and they reduce glare in situations like driving that could be dangerous.
The Evolution of Sunglasses
Sunglasses have come an extremely long way. They have become more practical, useful, and fashionable than ever. They can be beneficial to us too; tinted lenses protect our eyes from harmful ultra-violet rays and they reduce glare in situations like driving that could be dangerous.
In the 50′s and 60′s, sunglasses were old fashioned and functional, yet still chic and stylish. They were classy, but not so appealing. After the 70′s, a huge trend was the Bug-Eyed sunglasses. As the years went by glasses went through many changes and fads and today there are styles that have survived it all. One style that stood out and which is still well liked is the cat eye. They were simple and plain compared to the variety of colors and designs to choose from today. Aviator Sunglasses are the all time favorite style, favored by both men and women alike. This classic and elegant style of the Bug-Eyed style embodied the vibe of that era, and is extremely popular today in its new designs and colors.
There is no style that is too crazy now. Sunglasses come in all shapes, colors, styles and sizes, and retro and vintage styles are the fashion trend of the day.
From shielding facial expressions instead of sunlight, to blocking harmful rays while in outer space, to enabling us to see through water, sunglasses have been used for everything. Modern women-and men discovered an allure in wearing sunglasses, irrespective of the sun shining in their eyes. Sunglasses are multifunctional and practical today, some even have built-in digital audio player built in.
70% of today’s designer sunglasses are all made by one company, Italian manufacturer Luxottica – one of the biggest consumer companies that consumers have never heard of. Luxottica also makes sunglasses branded Burberry, Chanel, Polo Ralph Lauren, Paul Smith, Stella McCartney, Tiffany, Versace, Vogue, Persol, Miu Miu, Tory Burch and Donna Karan.