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Homework Help: Science: Physics: Contact Lens
by Justin Credible
The idea for the contact lens was originally thought of by Adolph Fick first thought of making contact lenses in 1888, but it took until 1948 for the first soft plastic lens to be made the inventor was Kevin Tuohy.
The lens was first discovered around 1000 AD.
The contact lens works just like a pair of glasses except it is not visible is attached to the naked eye usually with some sort of an artificial tear drop solution.
The problem that the contact lens is tackling is the problem of sight.
The oldest vision aid invented was called a reading stone, which was a glass sphere that was laid on top of the material to be read that magnified the letters.
Short History:
1508: Leonardo da Vinci sketches and describes several forms of contact lenses.
1632: Rene Descartes of France suggests the corneal contact lens.
1801: Thomas Young develops Descartes' idea -- a quarter-inch-long, water-filled glass tube, the outer end containing a microscopic lens -- and uses it to correct his own vision.
1827: English astronomer Sir John Herschel suggests grinding a contact lens to conform exactly to the eye's surface.
1887: Glassblower F.E. Muller of Wiesbaden, Germany, produces the first eye covering designed to be seen through and tolerated.
1888: Two independent researchers, A. Eugen Fick, a Swiss physician, and Paris optician Edouard Kalt, almost simultaneously report using contact lenses to correct optical defects.
1929: Joseph Dallos, a Hungarian physician, perfects methods of taking molds from living eyes so that lenses can be made to conform more closely to individual sclera.
1936: William Feinbloom, a New York optometrist, fabricates the first American- made contact lenses and introduces the use of plastic.
1945: The American Optometric Association (AOA) formally recognizes the growing contact lens field by specifying contact lens fitting as an integral part of the practice of optometry.
1950: Dr. George Butterfield, an Oregon optometrist, designs a corneal lens, the inner surface of which follows the eye's shape instead of sitting flat.
1960: Otto Wichterle and Drahoslav Lim experiment with contact lenses made of a soft, water-absorbing plastic they developed.
1971: The soft lens became available for commercial distribution in the United States.
1978: The first toric contact lens was approved for distribution in the United States.
1979: The first rigid gas permeable (RGP) contact lens made of co-polymers PMMA and silicone became available for commercial distribution. Many silicone- acrylate lenses are now available.
1980: A tinted daily wear soft lens became available for commercial distribution.
1981: Extended wear soft lenses became available for commercial distribution.
1982: Bifocal daily wear soft contact lenses became available for commercial distribution.
1983: The first tinted RGP lens became available for commercial distribution.
1986: An extended wear RGP lens became available for commercial distribution.
1987: Disposable soft contact lenses became available for commercial distribution; a soft contact lens to change eye color became available for commercial distribution; first multipurpose lens care product made available for commercial distribution. A new formulation of fluorosilicone acrylate material for RGP lenses became available for commercial distribution.
1991: Planned replacement contact lenses now available on the market. Daily-wear two-week replacement lenses now available on the market.
1992: Disposable tinted contact lenses available on the market.
1995: Daily disposable lenses available on the market; RGP lenses with low silicone content / high Dk fluorosilicone acrylates became available.
1996: First disposable lenses using ultra-violet absorber are available in the U.S.
1998: First multifocal disposable soft lenses available.
1999 New generation extended wear soft lenses introduced
Homework Help: Science: Physics
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