Contact lenses Buy a very emotional moment for one person, because it is the way they look, everything changes. The world is in a way that you see little distortion, which are the right size, and has seen everything at bay. In a sense it is a kind of shell shock, if the contacts and the person sees the world for the first time through them. But who invented contact lenses? Where did it come from? These questions are good, because it is aMystery of who the concept of contact lenses. However, you can look at the history of this little round piece of plastic that allows millions of people, the world as it is to be surprised.
The reason that there was some debate over who is the notion that Leonardo da Vinci sketched what was a goal that fits should appear to the thought. Then Descartes came up with the idea of contact lenses in 1632 Of course, at this point nothingnever to come until 1801, when Thomas Young the opportunity to adequately develop their own vision. This was done using a microscopic lens at the end of a glass tube that was filled with water.
However, in 1887 and 1888 were the years when progress has been made to develop a contact lens and free those who felt compelled by his own glasses. These were the years in which they were glass lenses, but they were not comfortable. They have only a small correctionSeries of visual impairment, were not exactly considered a success. What they were seen as a step in the right direction.
It was not until 1948, when Kevin Touhy immediately thought that the new lenses were made of polymethylmethacrylate (PMMA), which could be built on the market. He received the patent for the first plastic contact lenses and was much more pleasant than the glass lenses, which haddeveloped, sixty years ago. However, it was in 1961 that the lens Czechoslavakian Otto Wichterle's soft contact lens that has evolved and is still the choice of contact lenses. Continued but the goal is difficult to contact, to use soft contact lenses on the market in 1971 .
Contacts to develop further, according to people all over the world began to take advantage of the soft contact lens. In 1978, gas-permeable lenses were madeavailable. These lenses are hard contact lenses that the oxygen flow freely through them to allow the cornea. This is important to breathe for the eye. However, the contacts for a short period of time could be worn. It was not until 1981, as a contact for extended use approved. However, had the contacts to go throw away every week. If worn for too long, then the bearer of the risk of infection to the eyes. For the year 1986, which was an overnight wear of rigid gas permeable contactapproved.
But it was in 1987 that the only way to contact has been established. These soft contact lenses can be worn from one day up to two weeks before being discarded. It was suggested that they be taken in the night and every morning in order to receive the eye to 100% oxygen during the night. These contacts are still in use, but there are others have been introduced on the market.
In 2001, extended wear disposable contact has permitted to wearfor a maximum of 30 days without removal of contacts in the night market. Now, carriers are able to view 24 / 7 too. Some carriers are not able to wear these goals in order to continue to use extended wear for two weeks, but these contacts once again changed how the world looks.
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