Posts Tagged ‘Invention’

Condom, as everyone knows, is a protective sheathe made from rubbery substance such as latex or polyurethane, close at one end and open at another. It protects the user from Sexually Transmitted Diseases (such as AIDS and many more) and helps in avoiding unwanted pregnancy. Condoms come in different sizes, shapes, colors, flavors etc. They also come with varying level of lubricants in them, and user even can choose a condom of his/her choice. But how many of us know about the history of condoms? Where did they come from? Who invented condoms? Who used it first? What kind of material was used for the first condom? Was lubrication used? If yes, then what substance was used as a lubricant? Etc. (more…)

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Contact lenses are tiny removable lenses that are worn in contact with the eye (they rest directly on the cornea of the eye). Like glasses, they improve the wearer’s vision. This type of lens was envisioned (but not actually made) by Leonardo da Vinci (around 1508) and later by René Descartes (around 1636-1637).

Contact lenses were invented and made in 1887 by the German physiologist Adolf Eugen Fick (1829-1901). He first fitted animals with the lenses, and later made them for people. These lenses were made from heavy brown glass and were 18-21mm in diameter. The lenses were improved by August Muller in 1889; he made lenses that corrected myopia (nearsightedness).

Plastic contact lenses were first made by the California optician Kevin Tuohy in 1948. Soft contact lenses (hydrophilic lenses) and gas-permeable lenses (which let oxygen pass through the lens and to the cornea) were invented in the 1970s.

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