NANO TECHNOLOGY: Sunglasses

Sunglasses: "Sunglasses
Sunglasses or sun glasses are a form of protective eyewear that usually enclose or protect the eye pupil in order to prevent strong light, ultraviolet (UV) rays, and increasingly, blue light ('blue blocking') from penetrating. They can sometimes also function as a visual aid, as variously termed spectacles or glasses exist which feature lenses that are colored, polarized or darkened. In the early 20th century they were also known as sun cheaters (cheaters being an American slang term for glasses).[1]

Many people find direct sunlight too bright for comfort. During outdoor activities, the human eye can receive more light than usual. Healthcare professionals recommend eye protection whenever outside to protect the eyes from ultraviolet radiation and blue light, which can cause several serious eye problems. Sunglasses have long been associated with celebrities and film actors primarily from a desire to hide or mask their identity. Since the 1940s sunglasses have been popular as a fashion accessory, especially on the beach.

Peoria (named after the Peoria tribe) is the largest city on the Illinois River and the county seat of Peoria County,[1] Illinois, in the United States. As of the 2000 census, the city was the fifth-largest in Illinois, with a population of 112,936; by 2007 it was the sixth-largest city and had population of 113,546.[2] The Peoria Metropolitan Statistical Area had a population of 372,487 in 2008, making it the third largest metropolitan area in the state after Chicagoland and the Metro-East portion of the St. Louis metropolitan area."