from web site
Protection from the Sun's rays was not a concern for him. Antoine Lavoisier carrying out an experiment related to combustion generated by magnified sun light. Among the earliest enduring representations of an individual wearing sunglasses is of the scientist Antoine Lavoisier in 1772 who dealt with magnified sunshine. By the 19th century polluted eyeglasses were used by railway tourists.
From the later 19th century short references of sunglasses have been discovered in reports, such as by a Walter Alden in 1866, who wrote of soldiers using during the American Civil War (1861-5) 'shell eyeglasses' (verres de cocquille) to safeguard versus sunlight on long marches, or by the British T.
By 1895 sunglasses were discussed in ads, such as in The Sioux City Journal (on June 13). Modern advancements Jean-Marie-Thodore Fieuzal (1836-1888) was the first to argue for UV protection with (yellow) shaded glasses and, by 1899, Rodenstock Gmb, H produced possibly the first sunglasses intended for protecting eyes from UV light and not simply glare.
In the early 1920s, using sunglasses began to become more extensive, specifically amongst film stars. Inexpensive mass-produced sunglasses made from celluloid were initially produced by Sam Foster in 1929. Foster found a prepared market on the beaches of Atlantic City, New Jersey where he began selling sunglasses under the name Foster Grant from a Woolworth on the Boardwalk.
a preferred affectation of countless females all over the U.S." It mentioned that 20 million sunglasses were offered in the United States in 1937 however estimated that just about 25% of American users needed them to safeguard their eyes. At the same time, sunglasses began to be used as aids for pilots and even produced for the gaining air travel sector, eventually contributing to sunglasses as cultural icons and to their popularity.
Land began explore making lenses with his patented Polaroid filter. In Best Sunglasses with Side Shields , the Armorlite Company began producing lenses with CR-39 resin. At present, Xiamen, China is the world's largest producer of sunglasses with its port exporting 120 million sets each year. Functions Result of pair of polarized filters Visual clearness and comfort Sunglasses can enhance visual comfort and visual clarity by safeguarding the eye from glare.