On Sat, 13 Oct 2007 16:20:28 GMT, "Charles" <(E-Mail Removed)> wrote:
>Neil Brooks wrote:
>
>> On Sat, 13 Oct 2007 15:16:33 GMT, "Charles" <(E-Mail Removed)> wrote:
>>
>> > Neil Brooks wrote:
>> >
>> >> On Thu, 11 Oct 2007 12:06:00 -0700, Glenn - USAEyes.org
>> >> <(E-Mail Removed)> wrote:
>> >>
>> >> > Tears Naturale II use Polyquad as a preservative. It may be that
>> you >> > have an allergic reaction to this preservative or other
>> ingredients >> > in this particular artificial tear.
>> >> >
>> >> > As a general rule, the preservative-free artificial tears are
>> best. >> > You may want to consider switching.
>> >>
>> >> Agreed ... and I say this with QUITE A BIT of emphasis. (I also
>> think >> that the P-quads are derivatives of Benzalkonium Chloride ...
>> >> basically, Drano for the eye).
>> >>
>> >> Preservatives, for artificial tears/eye lubricants, are like
>> >> cigarettes: there is no safe one. I could give you hundreds of
>> lines >> of support, clinical trials, and reasoning for this, but ...
>> trust me: >> it exists ... in overwhelming quantities.
>> >>
>> >> I would suggest that you use ONLY preservative-free tears. Which
>> one >> is best is really subject to a lot of different variables that
>> are >> specific to YOUR dry eye case.
>> >>
>> >> Experimenting is reasonable.
>> >>
>> >> Also, you may want to stop by:
>> >>
>> >> www.dryeyezone.com
>> >>
>> >> They have a BIG FAQ section, AND an online forum (tell them Neil
>> sent >> you!). If you introduce yourself and your particular
>> situation, >> people will ask questions about your case, and then
>> help you narrow >> down which drops to try.
>> >>
>> >> Best of luck. Dry eye is a much larger problem than many people
>> ever >> imagine.
>> >>
>> >> Neil
>> >
>> > How does this advice relate to contact solutions? It seems that
>> > just dealing with contacts is equivalent to at least two doses of
>> > eye drops per day. I don't really see any preservative free
>> > alternative though.
>>
>>
>> Good question, Charles.
>>
>> In my estimation ... based on looking at lots of information about
>> preserved saline solutions ... I would avoid them, too. Same reasons.
>>
>> When I was wearing soft contact lenses, I used either the AOSept
>> system (with preservative-free saline solution (available at many
>> pharmacies)) or the PuriLens lens cleaner/disinfection unit ... again,
>> with PF saline (the PuriLens people also sell the PF saline).
>>
>> But ... it should be said ... I've got seriously dry eyes. If you
>> don't exhibit ANY symptoms of dry eyes, then this might be a
>> relatively extreme path for you to take.
>>
>> That said, all o these preservatives DO show a tendency to destabilize
>> the tear film AND hasten cellular dealth in the outer layers of the
>> cornea. It's a risk:reward calculation for each person.
>>
>> What I found was that avoiding the preservatives entirely (AOSept
>> and/or PuriLens) was really no big deal ... and did seem to prevent
>> further worsening of my ocular surface issues.
>>
>> Neil
>
>How about RGP's though? Boston is about the only game in town.
Ah, yes. I forgot. Astig only ... rgp's.
Let's see what's in their broth....
http://www.bausch.com/en_US/consumer...oncomfort.aspx
Boston Conditioning Solution:
Yup. Preserved.
Boston cleaner:
Yup. Preserved.
But there's a HUGE difference here: your RGP's do NOT act like a
sponge, so ...
1) You won't be slapping a soft lens -- hydrated WITH preserved stuff
-- onto your eyes;
2) A really cautious approach would be to simply rinse your RGPs with
PRESERVATIVE-FREE saline (even adding a drop or two into each lens)
prior to insertion;
3) IIRC, the PuriLens system works just fine for RGPs, too, though you
COULD do a little research. It MAY take a month or two off of their
ultimate useful life .... fair trade to me for ease, thorough
cleaning, and disinfection, but ....
NB: the PuriLens is something like 99.9% effective on its own. Forgive
the analogy, but it's a little like the birth control pill. It's even
SAFER with a condom in the equation.
So ... you COULD use a PuriLens (like 15 minutes), and THEN bathe it
in the Boston conditioning solution.
Just do a thorough rinse before insertion.
HTH,
Neil
Anything BUT a doctor ;-)