contact lens

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contact lens

World Encyclopedia | 2005 | Â© World Encyclopedia 2005, originally published by Oxford University Press 2005. (Hide copyright information) Copyright

contact lens Lens worn on the cornea to aid defective vision. Invented in 1887, lenses were initially made of glass. Modern contact lenses, developed (1948) by Kevin Tuohy, are made of plastic. Hard (corneal) lenses cover the pupil and part of the cornea. They are usually gas-permeable (allowing oxygen to reach the cornea). Soft (hydrophilic) lenses cover the whole cornea and are hydrated in saline solution.

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contact lens

The Oxford Pocket Dictionary of Current English | 2009 | © The Oxford Pocket Dictionary of Current English 2009, originally published by Oxford University Press 2009. (Hide copyright information) Copyright

con·tact lens • n. a thin plastic lens placed directly on the surface of the eye to correct visual defects.

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"contact lens." The Oxford Pocket Dictionary of Current English. 2009. Retrieved December 21, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-contactlens.html

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Free newspaper and magazine articles

	Contact Lens Users at Increased Risk for Vision Threatening Condition; Bascom Palmer Ophthalmologist Reports Notable Increase in Number of Serious Eye Infections in South Florida and Throughout the World. Business Wire; 3/29/2006
	Buying Contact Lenses on the Internet, by Phone or by Mail: Questions and Answers.(Pamphlet) Newspaper article from: Pamphlet by: Food and Drug Administration; 5/1/2001
	The Contact Lenses and Solutions Market - Industry Activity, Global Market Perspective and Major Company Profiles. Business Wire; 8/23/2007

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