Originally Posted by Knotlob

I did ask my contact lens specialist recently about wear times in general. See is very sensible/practical and tries to give a straight answer. She said the recommended wear time is set by the manufacturer, because exceeding this time resulted in blocking of the pores in the contact lens, which in turn reduced the oxygen permeability.

That was a new one on me, so I said to her that silicone hydrogel lenses don't rely on pores, as the oxygen is transferred directly from silicon molecule to silicon molecule. I guess that stumped her, so she said I would probably be best trying to get an answer from the manufacturer directly (which I have yet to do).

knotlob