Hi,
I got a trial pair of Bausch & Lomb's PureVision lenses as well as CibaVision's Night & Day contacts a couple of weeks ago. Unfortunately for me, my eyes felt a bit irritated by both lenses. I think it may be a reaction to the silicon material that these 30 day lenses are made of. I did manage to try both lenses for a few days though, and both can be slept in quite comfortably without waking up with dried out contacts. In otherwords, you can see clearly as soon as you open your eyes.
The PureVision lenses indead hold their shape better than any other soft lens, but this is because they have a greater centre thickness, making them more rigid. I found this to be a disadvantage in terms of comfort.
The Night & Day contacts are softer, more comparable to conventional soft contacts. They are also more technologically advanced than the PureVisions. They allow even more oxygen to reach the cornea.
As for the bacteria build up, I read that bacteria can't build up on these contacts. Or rather the amount of bacteria reaches a minimal level and then levels off. These contacts also resist protein deposits.
Anyway, just try them. You might like them. They weren't right for me but maybe you'll have better luck. I think most eye doctors will recommend you only wear the lenses for maybe a week continuous at a time.
[This message has been edited by moderator1 (edited 03-02-2003).]
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