Thread: Relationship Between Water Content and Oxygen Permeability
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Old 11-23-2009, 10:07 AM
SandiStix SandiStix is offline
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Default To Counterpoint the Surrealism of the Underlying Metaphor
Quote:
Originally Posted by Knotlob View Post
Take a look at this link:

http://www.optometric.com/article.aspx?article=101727

It discusses the evolution of silicone hydrogel lenses and includes some graphs showing Water Content versus Lens Stiffness versus Oxygen Permeability (dK value).

Silicone Hydrogel lenses are generally different to conventional lens materials but there are variations amongst the individual silicone hydrogel materials.

knotlob
Thanks for the link, Knotlob. I checked it out and part of the article says "In a slightly modified molecule, a polar group is added without changing the trimethyl structure." This isn't light reading, folks. There's a lot of scientific gobbledygook here.

Maybe you can help me with just one thing, Knotlob. What is "modulus"? I saw it many times in the article, and it sounds like something important, but it never defines this word. Maybe you can explain it.

Thanks.
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