Glasses

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A modern pair of prescription reading glasses

Glasses, also known as eyeglasses (formal), spectacles or simply specs (informal), are frames bearing lenses worn in front of the eyes. They are normally used for vision correction or eye protection. Safety glasses are a kind of eye protection against flying debris or against visible and near visible light or radiation. Sunglasses allow better vision in bright daylight, and may protect against damage from high levels of ultraviolet light. Other types of glasses may be used for viewing visual information (such as stereoscopy) or simply just for aesthetic or fashion purposes.

• See also: Wikipedia, Wiktionary, Wikiquote, Commons

• Related: Adjustable-focus eyeglasses, Contacts, Corrective lens, Eye examination, Eyeglass prescription, History of optics, Photochromic lens, Stereoscopy, Sunglasses, X-ray vision, Monocle

British Optical Association Museum British Optical Association Museum www.college-optometrists.org/.../index.cfm - Web

The Medieval Technology Pages The Medieval Technology Pages scholar.chem.nyu.edu/tekpages/spectacles.html - Web

Are Your Eyes Right Are Your Eyes Right www.popsci.com/.../archive-viewer?id=oiUDAAAAMBAJ&pg=12&query=Vol.+144 - Web

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