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Lens Original
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Famed artist Leonardo da Vinci was the first person to create the idea of a contact lens in 1508, but it was French philosopher Rene Descartes who invented contact lenses for their modern day use.

Contact lenses are placed over the cornea of the eye for corrective, therapeutic, and cosmetic purposes. The contact lens often furnishes the same benefits of a thick pair of glasses, the difference between the two corrective vision devices being that contact lenses are lightweight and visibly untraceable.

Approximately one hundred twenty-five thousand people across the world where contact lenses. Lenses are most people in the United States and Japan. Between twenty-eight and thirty-eight million Americans sport contacts, while lens are laced by thirteen million people in Japan.

Leonardo da Vinci is customarily credited as the man who invented contact lenses. Da Vinci first suggested a method of testing the power of the cornea by submerging the eye in a bowl of water in his 1508 philosophical work Codex of the Eye, Manuel D. Leo's interest was in how the eye adjusted to exposure to certain elements. Da Vinci was not interested in using contact lenses as apart of corrective vision, as they have become, that optical innovation came with French philosopher and mathematician Rene Descartes. In 1636, Descartes suggested filling a glass tube with some type of liquid and placing the tube over the cornea. The original design called for the bottom of the glass tube to be shaped to correct vision-the design went belly up when it was deemed as making blinking impossible.

In 1801, British scientist Thomas Young developed an "eye cup" filled with liquid which is considered the world's closet predecessor to the modern day contact lens. Similar to the contact developed by da Vinci, Young's contact lens was not originally designed for optical correction. In 1887, Adolf Eugen Fick who constructed the very first successful corrective contact lenses.

Contact lenses fit three basic functions, corrective contact lenses, therapeutic contact lenses, and cosmetic contact lenses. Contact lenses for the purpose of correct faulty vision were the first in the family of visionary caps. These contacts have been called in to correct several optical disorders that cannot be corrected with eyeglasses, including the non-inflammatory disorder keratoconus and aniseikonia, a condition caused by unequal retina sizes. Corrective contact lenses are also prescribed for optical conditions like near-sightedness (medically classified as myopia), far-sightedness (hypermetropia), and irregularly shaped corneas characterized by astigmatism.

Therapeutic contact lenses, or soft contact lenses, are customarily used to treat disorders of the eye that fall into categories like dry eyes, corneal ulcers, erosion of the eye, and bullous keratopathy. Therapeutic contacts have been compared to "bandage lenses," for their protection properties for non-refractive disorders of the eye.

Cosmetic contact lenses are used to change the appearance of the eye. Chic cosmetic contacts often create color changes in the eye. The American Food and Drug Administration classify cosmetic contact lenses as "decorative contacts." The costume colors and designs associated with cosmetic lenses have been linked to causing blurred vision as well as optical burning. Theatrical and scleral are types of cosmetic contact lenses.

Want more information on who invented contact lenses and where to find discount contact lenses? Try visiting http://www.vision-doctor.com, a popular website that offers tips, advice and resources related to eyeglasses, sunglasses, LASIK eye surgery and popular contact lenses

Enthusiasm and Excitement: Unique Contact Lens for Halloween

There are cute pumpkin lanterns, witches, pirates, children with various cosmetics wandering around the streets. Well, this is the Eve of Halloween Day. It is really a time for ghost. Though there are several opinions about the origin of Halloween, no one can defy that it is a festival full of myth, absolutely different from the others, which are always filled with some saint circumstances.

 

Nowadays, Halloween has become a day for fun all over the world. During all days’ dull and busy work, people try their best to enjoy themselves in this special day every year. It does spend people a lot energy, time and money to make a unique images. Changeable images always bring about great enthusiasm and excitement. Innovation is continuing all the time.

 

Well, this year the contact lens intended for the Halloween gain more attention. A number of super stars made their own images by choosing a pair of Halloween contact lens. Indeed, whatever images you choose, a pair of such contact lens will make the image more vivid, indeed.

 

Here are some of unique contact lenses. With them, you can have a pair of eyes like a real ghost with brilliant red eye balls. Some fire can be burning in your eyes, even there are white teeth shining there. Among these contact lenses, you can choose the version with circling colors, like red, yellow, orange, green blue, etc. According to the clothes you wear, any kind can be chosen. As a football fan, you can choose the one with white-black pattern like football. Someone like a pair of black eyes, this dream can also be realized by a pair of Halloween contact lens. There are even some relative ones, which are black with red or green patterns. Maybe you want to become the corpse or vampire like in the horrible movies, there is the chance for you. The Halloween contact lens are the very one for you and just choose one of them. Besides the Eve of Halloween, in some makeup ball, this unique contact lens may bring about charming different from others.

 

By the way, after the special time, take off the unique contact lens right away. After all, some plain ones will be better for the health of eyes.

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video camera filter & lens question?

every time i see "jackass" or "viva la bam" i see one of the guys with a regular mini dv camera, but it has like a big lens or a filter attached to the original lens. Does anyone know what is probably attached to the lens?

a fisheye lense

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