It was so far back in time, at year of 1430 in china that of coarse their glasses were not of any prescription, and they were not used to protect your eyes from the sun. The Chinese judges had often worn sunglasses with quartz to hide the expression in their eyes while during a court case. 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 the 18th Century. He as well, did not seek sunglasses as protecting your eyes from the rays of the sun, but for the correction of vision impairments. Where we use them to block harmful UVA/UVB rays.
This was the time period where they started to realize that sunglasses would be a great help to protect your eyes from the sun. They were first sold in the Atlantic City, New Jersey. When the year of 1930 struck was when everyone had to own a pair. In 1960 sunglasses started to develop their actual style for fashion.
When the 20th Century hit is when we start to see the wide range of the sunglasses popularity.
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