1) " Eyeglass" -- As it applies to Eyeglass Lenses Glasses, spectacles, or eyeglasses are frames bearing lenses worn in front of the eyes, sometimes for purely aesthetic reasonsbut normally for vision correction or eye protection. Special glasses are used for viewing 3-D images orvirtual reality. Modern glasses are typically supported by pads on the bridge of the nose and by armsplaced over the ears. Historical types include the pince nez, monocle, and lorgnette. Glasses are more often called Eyelass es in NorthAmerican English, spectacles in British English, and(rarely) frames or lenses. Spectacles is often shortened to specs. In hipster slang they are cheaters. Also see usage of words for eyepieces for a more detailedexamination of the different usages for these words.Glasses were originally made from glass, but many are now made from plastic due to the danger of breakage and the greater weight of glass lenses. Glass lenses,on the other hand, are much less susceptible to scratching. Corrective spectacles have lenses shaped to correct some kinds of vision abnormalities. Safety glasses are a kind of eye protection that protects against flying debris but may also protect against visible and near visible light or radiation. Sunglasses protect against high levels of visible and ultraviolet light. Contents 1 History 2 Corrective glasses 3 Safety glasses 4 Sunglasses 5 Special glasses 6 Conditions glasses are used to correct 7 Variation in glasses 8 Glasses as a fashion accessory 9 See also History Detail of a portrait of Hugh de Provence, painted by Tomasso da Modena in 1352 Glasses were invented in northern Italy, most likely in the late 1280s. The identity of the orginal inventor is unknown. In 1676, Franciscus Redi, a professor of medicine atthe University of Pisa, wrote that he possessed a 1289 manuscript whose author complains th...
2) " Lenses" -- As it applies to Eyeglass Lenses A lens is: a part of the eye an optical device that may be used in a camera or in a telescope ; see lens(optics).the genus of the lentil a science-fictional alien device in E. E. Smith 's Lensman series, which gives its bearer telepathic and other abilities. There are also places called Lens: Lens, Pas-de-Calais, France Lens, Belgium Lens, Valais, Switzerland as well as Racing Club de Lens, a football club from the French city listed above. Leses ...
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