History, The Roman emperor Nero liked to watch gladiator fights through polished gem stones. First used in China in the 12 century. The "lenses" were flat pieces of smokey quartz, no corrective powers but protected the eyes from glare. Judges in Chinese courts used tinted lenses to conceal facial expressions, hence the phrase, "blind justice". Introduced in America by Sam Foster in 1929, he started selling them as Foster Grants at Woolworth on the Boardwalk on the beaches of Atlantic City, and New Jersey. Polarized
lens were developed in 1936 by Edwin H. Land. Wayfarers were introduced in the 1950's. Revo or revolutionary sunglass mirrored coating was developed by NASA for astronauts.
Also known as:
Sun spectacles, by opticians.
Spekkies in South Australia
Sun specs, shortened version of Sun Spectacles
used in Britain and North America
Sunnies, Australian slang
are a visual aid, with coloured or dark lenses to screen out strong light from your eyes. Recommended to wear on sunny days to protect your eyes from UV, that can lead to cataracts.
improve visual comfort and laity by protecting the eye from glare.
There is no correlation between high prices and increased UV protection. A 1995 Study reported that "Expensive brands and polarizing sunglasses
do not guarantee optimal UVA protection." The Australian competition and Consumer Commission has also reported that "consumers cannot rely on price as an indicator of quality."