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What Are Contact Lenses Made of?

This is a discussion on What Are Contact Lenses Made of? within the Focus Night & Day forums; Okay, here's a very basic question, but one I just thought of. What are contact ...


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Old 05-13-2008, 03:39 PM
Contact Lenses Forum - Masters Degree
  
Join Date: Nov 2007
Posts: 177
Default What Are Contact Lenses Made of?
Okay, here's a very basic question, but one I just thought of. What are contact lenses made of? Plastic? Silicone? I hear all these exotic terms like polymacon and lotrafilcon A, but what exactly is that stuff?

Thanks.
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Old 05-13-2008, 10:28 PM
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Join Date: Apr 2008
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My eye doctor told me that traditional soft contact lenses are made from Hydrogel Polymers which is soft-water containing plastic. I was switched to the 30 day contact lenses which contains Silicone Hydrogel. Silicone Hydrogel contact lenses contain less water so they won't get as dehydrated while in your eyes. With Hydrogel Polymers the plastic itself is not oxygen premeable, so water performs the job of carrying water to the lens through the eye. Water can carry so much oxygen and the more water a lens contain the greater the risk it will dehydrate after long periods of time.
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