contact lens
February 22nd, 2011
contact lenses
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Archive for February, 2011
Contact Lenses: Compare Prices from major Contact Lens Sites
February 1st, 2011
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C Contact Lenses: Compare Prices from major Contact Lens Sites
· Daily Disposable
· 1-2 Week Disposable
· Lens Cases
Contact Lenses Brand
Bausch & Lomb
Johnson & Johnson
Calaview Color Lenses
Magic Lenses
Acuvue
Biomedics
Freshlook
Freshkon
Ciba vison
Polylite 38
Igel UV Blue
Sun Lens UV
Ey-Art
Focus
Acme
Source :-www.SoftTouchLenses.com
Contact lens - Wikipedia, the free encyclopedia
February 1st, 2011
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Contact Lenses
A contact lens (also known simply as a contact) is a corrective, cosmetic, or therapeutic lens usually placed on the cornea of the eye. Leonardo da Vinci is credited with describing and sketching the first ideas for contact lenses in 1508, but it was more than 300 years later before contact lenses were actually fabricated and worn on the eye. Rigid ones were produced and marketed first. Modern soft contact lenses were invented by the Czech chemist Otto Wichterle and his assistant Drahoslav Lím, who also invented the first gel used for their production.
Some soft contact lenses are tinted a faint blue to make them more visible when immersed in cleaning and storage solutions. Some cosmetic lenses are deliberately colored to alter the appearance of the eye. Some lenses now have a UV protection surface treatment to reduce UV damage to the eye’s natural lens.
It has been estimated that 125 million people use contact lenses worldwide (2%), including 28 to 38 million in the United States and 13 million in Japan. The types of lenses used and prescribed vary markedly between countries, with rigid lenses accounting for over 20% of currently-prescribed lenses in Japan, the Netherlands and Germany but less than 5% in Scandinavia
People choose to wear contact lenses for many reasons, often due to their appearance and practicality. When compared with spectacles, contact lenses are less affected by wet weather, do not steam up, and provide a wider field of vision. They are more suitable for a number of sporting activities. Additionally, ophthalmological conditions such as keratoconus and aniseikonia may not be accurately corrected with glasses.
Source :- http://en.wikipedia.org
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