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The manufacturer of contact lenses – a story
This year (2008) will be the 500th anniversary of the original design of the lens. Now is the Form result of centuries of imaginative thinking, scientific reasoning and technological progress.
In 1508, Leonardo da Vinci is the first design of a lens contact. He did not propose this as a way to correct vision, but as a way to understand how the eye is able to preserve the visual clarity of an object that the object near or within the field of vision. remarkable idea of Leonard Da Vinci was not possible, both in technological limitations.
The next step was a unlikely to be provided by astronomer John Herschel in 1827 to grind and get in shape for the shape of the eye's surface.
Under this methodology, Sir John Herschel suggested that mold of the eye to be taken to ensure that its shape is fine-tuning of the shape of the eye. However, the technological capacity to create a mold of the eye was not present during the first half of the 19th century.
With the invention of anesthesia in 1884, a glass blower by the name of FA Muller's glass lens constructed of first contact time in 1887. But the first version to correct vision was not created in 1888 by the Swiss physician AE Fick and French optician Edouard Kalt.
Originally were made of glass and covered the entire front of the eye. The glass eye deprived of oxygen to your health long-term risk. Moreover, they were heavy and uncomfortable when most people could not use them for a couple of hours.
Plastic was not used in its construction until the 1930s. These forms of plastic lighter and more comfortable than their counterparts in the past but still focused mainly on the eye and prevents oxygen from reaching the eye.
In the late 1940s, American optician Kevin Tuohy is manufactured a plastic version that covers only part of the eye called the cornea. However, their contribution is still not allowed that most of the eyes to receive oxygen. Tuohy innovation is commonly called a form of rigid contact lenses.
continued hard lenses to improve over the next two decades, but still became uncomfortable to wear for long periods of time. A remedy came from peer application that were manufactured in 1971. Contact lenses are the result of years work by the Czech chemist Dr. Wichterle had been experimenting with a type of acrylic plastic called hydroxyethyl (HEMA). These alternatives are soft hard when dry, but soft when wet. This makes them more comfortable to wear, but it is harder to implement.
Permeable contact lens gas was first approved by the FDA in 1979. Like their counterparts in soft gas permeable forms of oxygen allowed reach the eye and are fun to use. Unlike their counterparts soft, gas permeable varieties are easier to handle.
The most recent was the introduction of contact lenses silicone hydrogel in the European market in 1999 and the U.S. market 2001. silicone hydrogel neutralize or mitigate a series of health problems related to the eye such as corneal neovascularization swelling, and progressive increase in myopia.
the contact lens manufacturers and researchers have made significant progress in health and comfort qualities this optical technology since its introduction in the 1880s. These advances in the comfort and health are the victories won by hard work and creativity many scientists, researchers and innovators.
About the Author
Independent optician’s need an experienced and trustworthy contact lens manufacturer to offer quality products to their customers. For a lens manufacturer to work with you as a partner, eye care professionals should visit National Optical Co. online at http://www.nationalopticalco.com/.
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