It was probably due to sudden transient differential changes in the
index of refraction of the different tissues and aqueous humor. Once
the changes equilibrated, the effect was lost. It is the difference in
the index of refraction from one medium to the adjacent medium that
causes light to bend.

DrG

When your blood glucose is high you also have an elevated glucose in
the aqueous. The glucose in the aqueous passes through the lens
capsule increasing the osmotic pressure in the lens causing it to
imbibe fluid and changing shape, altering your refractive error. This
is why you saw so well; you were lucky that it happened to "hit the
nail on the head" causing a desirable refractive error. The glucose
passes easily through the lens capsule but it changes to sorbitol once
inside the lens and sorbitol does not so easily pass across the lens
capsule. Therefore your vision will change abruptly when your blood
sugar rises but will return to normal much more slowly. It was not the
IV fluid that helped your refractive error, it was the alteration in
blood (and at the same time) aqueous glucose.

Ted.

<<I think as one of the other people here said it's just some
temperarily fluke because of the diabetis incident for which you got
the IV.>
That was really SOME fluke though... especially since my vision was
razor sharp for DAYS. Even when driving at night, which was my worst
time. It would be a real shame to have experienced that with no way to
get it back.

The only other thing I can think of is this: the same time that
happened, I had chronic sinusitis. It was bad enough (cysts and polyps
obstructing 50% of certain sinuses) that I had to have surgery for it
recently. The only other thing I could think of as a reason is that
perhaps the sinusitis had some impact on my vision and the I.V. fluids
somehow helped temporarily?

p.clarkii[at]gmail.com wrote:
- quote -

OP says he could see well withóut glasses with the IV. That is what he wants
back, but Doug, I think as one of the other people here said it's just some
temperarily fluke because of the diabetis incident for which you got the IV.
Just try for fun to ask the hospital to give you an IV bag now and you'll
probably see it won't do anything special for your sight.

SF

i think all you will have to do to get your sharp vision back again is
to go to the eye doctor and get new glasses. now that your blood sugar
has stabilized your refraction will have stabilized also so your new
glasses should work well.

good luck.

Dr Judy wrote:
- quote -

My diabetes has been brought completely under control by Byetta and
Metformin. My blood sugar is NEVER outside the normal range. My A1C
(average blood sugar for 2 months) was under 6.5 which is the best it
can be, considered "A+".

I'm still confused about vision though. After those I.V. bags I had
vision as good as I had 15 years ago for several days...... it was
really, really nice. Now, even though my blood sugar is flawless my
vision is back to where it was before. Why would simply getting 2 or 3
I.V. bags give me vision like a hawk for a few days? Literally, during
that period of several days putting my glasses on actually made my
vision WORSE - it was *that* clear!

I'm very, very pleased that my diabetes is under such great control but
I would really like to have that razor vision I had after the I.V. bags
back again. It seems to me that if my eyes are still capable of seeing
like that, there must be a way to bring that clear vision back?

Bringing the blood sugar down to normal cleared the vision. Very high
blood sugar causes changes in the lens of your eye which increase
myopia, when blood sugar is normal, so is the lens. Likely your blood
sugar has been too high for a long time and your glasses had the
correction for myopia.

<dougreding[at]gmail.com> wrote

- quote -

Diabetes causes transient changes in refraction because thick, syrupy blood
makes the aqueous humor thick and syrupy, so that it draws water out of the
crystalline lens and makes it shrink.

In some cases the change is "beneficial" and in others it goes the wrong
way.

In either case, it's usually transient. When BG is restored to normal the
lens "inflates" back to its previous dimensions.

-MT

In article <1145253955.209998.36390[at]u72g2000cwu.googlegroups.com> ,
dougreding[at]gmail.com wrote:

- quote -


- quote -

Have you seen an eye doctor? Do not walk, run! Diabetes causes two
types of vision problems, one short term and one long term. The short
term one isn't so serious, as far as your eyes are concerned. I'm
guessing that you just need new glasses. The long term effects are
permanent and irreversible.

--
Dan Abel
dabel[at]sonic.net
Petaluma, California, USA

OK this was bizarre. I was recently diagnosed with type 2 diabetes.
Before being diagnosed I was getting the usual symtpoms: unquentionable
thirst, blurred vision, etc. The endocrinologist put me on insulin and
metformin and we still had a hard time controlling it, and they started
to think type 1.

One incident I had to go to the ER because my blood sugar was up to
400. They brought it back down by giving me 2 or more bags of IV fluid
quickly, and some insulin as well. This brought my blood sugar to
normal but had a VERY strange side effect: my vision was as crystal
clear after I left as it was over 10 years ago when it was better than
20/20. The only thing different was the IV fluid. It was so good that
putting on my glasses made my vision blurry, not clear!

I am on Byetta and Metformin now, and my blood sugar is never outside
the normal range. In fact it's tightly in the normal range and my A1C
is A+. However, the razor clear vision I experienced for SEVERAL DAYS
after the IV fluid went away despite the fact that my blood sugar is
phenomenal now. Drinking lots of water in an attempt to mimic the
effect of the IV fluid has been to no avail.

Any ideas under what circumstances giving someone 2 or 3 bags of IV
fluid could dramatically improve their vision and why?? I'd like to get
that vision back, since obviously I am capable of it, I just don't know
what is preventing me from having it that bags of IV fluid brings out.

Thanks in advance.