Quote:
Originally Posted by mgash
Unless your're a chemist this answer is meaningless. Buying Softlenses is like buying a b&w tv vs a color one. Softlenses go back a very long time. OD's are not writting scripts for these for new contact wearers, only those who have been wearing them.
|
Exactly. Balafilcon A (PureVision) has a Dk (oxygen permeability) of 90 units.
Polymacon (Softlens) has a Dk of less than 9 units. So the Purevision lenses are 10 times more breathable. Polymacon is old technology.
knotlob