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There is a significant difference between extended wear contacts and
non extended wear contacts, and that is oxygen permeability. The
permeability in all contacts slowly drops as the contacts age and
build up proteins, which causes swelling in the eye, reduces visual
clarity, and can eventually cause severe eye pain. There is no debate
or mystery over this, an optometrist can determine exactly how much
swelling is occurring in your eye and recommend more permeable lenses
or shorter wear periods if necessary. If you sleep with your contacts
in every night (as I do) and only remove them after a month, they
must be thrown away or they will eventually cause serious problems. I
have experienced it myself both from using low permeability lenses,
and from using high permeability lenses that were too old for
extended periods of time. If you don't mind removing them nightly (as
I suspect you do) you might be able to get by with it, but it's not
really worth the risk or wasted time in my opinion compared to
extended wear and monthly replacement. For the entire month I can
forget that I even have contacts!
Tyler
On Nov 30, 2006, at 7:00 PM, LT Don wrote:
I got in close (but not quite THAT close -- she was married to an
airline
pilot) with my eye doctor when I was stationed in DC.
Turns out that the disposable contact lenses and the $200-a-pop /
clean and
reuse contact lenses come off of the same line. The only difference
is the
packaging.
Perhaps it is because my first wife was from Maine, but I have that
tight-wad New England sort of stuff now ingrained. I refuse to
throw away a
good contact lens unless it is ripped. Or so Doctor said, and I
trust her.
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