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"Silicone Hydrogel Contact Lenses

http://www.allaboutvision.com/contac...drogel.htm#you
http://www.siliconehydrogels.org/

By Liz Segre;
reviewed by Dr. Joseph T. Barr

On this page:

* 30-day continuous wear
* 6-night wear, daily wear
* Are silicone hydrogels for you?

A new generation of "super-permeable" contact lenses can transmit unprecedented amounts of oxygen to your cornea and, in some cases, enable 30 consecutive days of wear without removal.

Silicone hydrogel contact lenses represent a breakthrough over traditional hydrogel soft contact lenses, because silicone lets so much oxygen (essential for a healthy cornea) pass through the lens. "We're talking about lenses that breathe six to seven times more oxygen than previous lenses," says P. Douglas Becherer, O.D., former chairman of the American Optometric Association's Contact Lens and Cornea Section.

Silicone hydrogel contact lenses have caught on with both wearers and eye care practitioners. By 2009, silicone hydrogel lenses are expected to account for more than two-thirds of U.S. soft contact lens sales (in dollars), according to equity research firm Robert W. Baird & Co."