I recently lost about 30% vision in one eye which has been diagnosed as
ischemic optic neuropathy (ION). I have been taking various meds such
as Amiodarone, hydrochlorothiazide, Metoprolol Tartrate, asprin, and
Lovastatin.
The optomologist suggested the problem was caused by changes in
blood pressure, which damaged the optic nerve, but didn't comment
on the medications. They will mail me a report I can forward to
my primary care doc.
My blood presure was fairly low (97/50) a couple months ago after
CABS, and several adjustments have been made to try and reach normal
levels.
At the time of the vision loss (a few weeks ago), the BP was stable
around 120/70 so I don't understand why this problem occured so late
after the BP was close to normal.
If it's a problem with low BP, why didn't it occur earlier when the
BP was much lower than it was at the time of the attack?
-Bill
Dr Judy - 11 Dec 2004 21:12 GMT
>I recently lost about 30% vision in one eye which has been diagnosed as
> ischemic optic neuropathy (ION). I have been taking various meds such
[quoted text clipped - 18 lines]
>
> -Bill
The medications that you are taking and the surgery you have had suggest
that you have advanced systemic cardiovascular disease which, in itself, is
a significant risk factor for ION.
ION is due to a loss of blood supply to the optic nerve, usually due to
narrowing or blockage of the vessels supplying the nerve. A sudden,
prolonged drop in blood pressure could be the "final straw" in someone with
pre existing blockage but low blood pressure, by itself, is not likely the
sole cause. As ION is a complex condition with multiple causes, you may
never know exactly what was the precipitating event in your case.
For some more info on ION:
http://www.revoptom.com/handbook/sect6a.htm
Dr Judy