Quote:
Originally Posted by mgash
Good luck! I spept in a Purvision and ended up with torn cornea.
As for the material, Softlens is a very very old lens, and no doc is prescribing them for new contact wearers. They have a Dk (amount of oxygen that passes) that is so low, you might as well wrap your eyeball in seran wrap.
To put to in perspective, Softlens has Dk of 19 or 8 depending on the method calculated. Oasys has 170 or 140. What's worse is Softlenses are thirty day lenses. That a long time to keep that junk in your eye.
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A torn cornea? Really?! How many nights did you sleep in those Purevision
contacts? Has your cornea healed by now?
I did some online research and didn't find anything that indicated when SofLens MultiFocal
contact lenses were invented. I doubt they're "very, very old" like you said. That makes it sound like they were around in the 1800s or something.
Nor did I find anything that said that eye doctors aren't prescribing them any more to new patients. Can you provide a link to a website that says that?
According to www.bausch-now.com, SofLens MultiFocal have a "non-edge corrected Dk/t value (Oxygen Transmissibility) [of] 24." Not quite as low as your "19 or 8," but close.
Slipping over to www.acuvue-now.com, that site says that Oasys has a Dk/t value 147 at -3.00D, center, non-edge-corrected, so you're pretty close on that number as well.
Let that be a lesson to all of you out there. When you start quoting numbers on this site, you should be ready to back them up. As you can now see, mgash is not just making those numbers up.