| Long before they became fashionable accessories for sunny days, some of the earliest sunglasses served a far different purpose: In Chinese courtrooms, judges used dark-lensed glasses to hide their facial expressions. Eyeglasses became popular in Chinese society during the late 13th century and early 14th century, and around the same period, rudimentary sunglasses featuring dark lenses made from smoky quartz were invented. While they protected against glare, they were also intended to provide judges with an air of impartiality during trials by obscuring their eyes — and thus their emotional responses. It wasn't until the 18th century that an early precursor to modern sunglasses, explicitly designed for dealing with sun and glare, became popular in Europe. "Goldoni's eyeglasses" were developed circa 1700 in Venice, Italy, and were nicknamed for playwright Carlo Goldoni, who fashionably wore a pair. These green-tinted spectacles were primarily worn by Venetian gondoliers as well as high-society women and children in an effort to shield their eyes from the glare that bounced off the canal water. In 1752, British optician James Ayscough unveiled a new invention to serve a similar purpose: blue-tinted glasses that he believed protected eyes against harmful light better than white glass. | 
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