Thread: Purevision Multi-Focal vs SofLens Multi-Focal
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Old 07-04-2010, 03:15 PM
mgash mgash is offline
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Quote:
Originally Posted by Knotlob View Post
Exactly. Balafilcon A (PureVision) has a Dk (oxygen permeability) of 90 units.

Polymacon (Softlens) has a Dk of only 9 units. So the Purevision lenses are 9 times more breathable. Polymacon is old technology.

knotlob
If Softlenses had a Dk any lower, you could wrap your eyeball with seran rap.
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