In article <(E-Mail Removed)>,
"Mike Tyner" <(E-Mail Removed)> wrote:
> "clee" <(E-Mail Removed)> wrote
>
> > Why are these long-use lenses not available (or not prescribed)
> > anymore? Is it because of some property inherent to the lenses
> > themselves or because people wore them too long, didn't clean them
> > properly, etc.?
> >
> > I'm mostly curious, because I used to have great success with these,
> > many years ago, and have noticed that no one among my acquaintances
> > wears them now.
>
> The biggest reason is complication rates. Corneal ulcers and keratitis are
> much less common if you replace lenses every month or more.
Good to know.
> The packaging (glass vials) is expensive.
I have problems swallowing that. Glass is pretty darn cheap. I buy
lots of sterile things in glass. My theory is that the lenses are
really cheap, and it's other costs that they need to recover. I suspect
that they are looking for a certain amount of money per year per
patient. Those old vial lenses used to run me US$100. A year's worth
of monthly foil packs wasn't much more.
> The materials are ok, mostly, but pretty obsolete compared to the
> high-permeability hydrogels and silicones used today.
>
> If you're taking them out at night, I go along with patients using "vial"
> lenses and replacing them every 2-3 months.
ObReallyStrange: Before my first cataract surgery, somebody from my
church (a retired nurse) gave me a pamphlet that she found in her attic.
It said that there was a new option rather than those terrible phakic
glasses. You could get contacts! They didn't have the disadvantages.
The doctor would insert them into your eyes, and you would come in once
a year, where the doctor would remove the contacts, inspect them and
clean them. The doctor would then reinsert them until the next year.
--
Dan Abel
Petaluma, California USA
(E-Mail Removed)