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Science Forum Index » Medicine - Vision Forum » Dilation recovery response time.
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| Don W |
 Posted: Tue Jun 05, 2007 11:00 pm |
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It has been mentioned somewhere that there is a new dilation drug
that has a faster response in coming out of that mode. Like for
people who after an appointment have to drive home. Question, is
there such a new drug on the market?
Thanks.
Don W. |
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| michael toulch |
| Posted: Wed Jun 06, 2007 6:58 am |
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On Jun 6, 12:00 am, Don W <dwil...@prodigy.net> wrote:
Quote: It has been mentioned somewhere that there is a new dilation drug
that has a faster response in coming out of that mode. Like for
people who after an appointment have to drive home. Question, is
there such a new drug on the market?
Thanks.
Don W.
there is a drop that can be instilled after dilation to reverse
effects. |
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| Mike Tyner |
| Posted: Wed Jun 06, 2007 8:04 am |
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"michael toulch" <michaeltoulch@hotmail.com> wrote
Quote: there is a drop that can be instilled after dilation to reverse
effects.
If you mean dapiprazole, the only brand name I ever heard was Rev-Eyes and
it's no longer available.
I tried one bottle. It wasn't consistently effective and it caused a lot of
redness.
-MT |
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| Don W |
| Posted: Wed Jun 06, 2007 12:58 pm |
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Quote: there is a drop that can be instilled after dilation to reverse
effects.
I don't believe it is the one that reverses the effect. It just has
a more finte duration. One side effect is that it had a bad effect on
the lens. Will try to get the name.
Don W. |
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| Mike Tyner |
| Posted: Wed Jun 06, 2007 1:08 pm |
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"Don W" <dwilgus@prodigy.net> wrote
Quote: I don't believe it is the one that reverses the effect. It just has
a more finte duration. One side effect is that it had a bad effect on
the lens. Will try to get the name.
Pehaps pilocarpine, an old glaucoma drug that constricts the pupil and
causes spasm of accommodation.
-MT |
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| Ms.Brainy |
| Posted: Wed Jun 06, 2007 1:23 pm |
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On Jun 6, 11:08 am, "Mike Tyner" <mty...@mindspring.com> wrote:
Quote: "Don W" <dwil...@prodigy.net> wrote
I don't believe it is the one that reverses the effect. It just has
a more finte duration. One side effect is that it had a bad effect on
the lens. Will try to get the name.
Pehaps pilocarpine, an old glaucoma drug that constricts the pupil and
causes spasm of accommodation.
-MT
Don,
I am certainly not an expert on any of the above, but I personally
will be reluctant to experiment with them. In my short personal
experience I have had different drops instilled in my eyes that lasted
anywhere from 2 to 8 hours, whereas one drop of Atropine lasted
several days. I found out that I can drive safely with dilated pupils
if I wear my UV protecting sunglasses. I am in sunny southern
Arizona, probably the sunniest place in the U.S., and if I could do it
here (with a thick cataract in one eye), I am confident you can do it
wherever you are. However, night driving is a whole different ordeal
(unbearable glare) -- avoid it! |
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| Don W |
| Posted: Wed Jun 06, 2007 4:23 pm |
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I found out that I can drive safely with dilated pupils
Quote: if I wear my UV protecting sunglasses. I am in sunny southern
Arizona, probably the sunniest place in the U.S., and if I could do it
here (with a thick cataract in one eye), I am confident you can do it
wherever you are. However, night driving is a whole different ordeal
(unbearable glare) -- avoid it!
....I seem to have trouble posting.... excuse any double messages...
No soap in driving in the daylight sunlight (at least for me). Most
of the light reflected into sunglasses is pretty dimmed. But the
reflection off rounded car surfaces is pretty (tooo) bright.
Night driving, agree, the halogens and the LEDs (??) are too
bright. Not sure how they got approved.
Also an effect with dilation, street stop-go lights take on a three
way shift off center (equal angles). Green the most. About 1/2 light
diameter. Green the most prevelant. Any theories???
Don W. |
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| Mike Tyner |
| Posted: Wed Jun 06, 2007 6:08 pm |
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"Don W" <dwilgus@prodigy.net> wrote
Quote: Also an effect with dilation, street stop-go lights take on a three
way shift off center (equal angles). Green the most. About 1/2 light
diameter. Green the most prevelant. Any theories???
Blue light refracts more than red in any lens system.
-MT |
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| Don W |
| Posted: Wed Jun 06, 2007 6:32 pm |
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On Jun 6, 4:08 pm, "Mike Tyner" <mty...@mindspring.com> wrote:
Quote: "Don W" <dwil...@prodigy.net> wrote
Also an effect with dilation, street stop-go lights take on a three
way shift off center (equal angles). Green the most. About 1/2 light
diameter. Green the most prevelant. Any theories???
Blue light refracts more than red in any lens system.
-MT
OK, on the refraction principle, but in viewing these lights, there
are three offsets, one at 0 degrees, one at 120 degrees, and the last
at 240 degrees. All offset the same amount from the original light by
a half of diameter. So why should the dilated eye, behave like that?
Don W. |
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| Mike Tyner |
| Posted: Wed Jun 06, 2007 8:19 pm |
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"Don W" <dwilgus@prodigy.net> wrote
Quote: OK, on the refraction principle, but in viewing these lights, there
are three offsets, one at 0 degrees, one at 120 degrees, and the last
at 240 degrees. All offset the same amount from the original light by
a half of diameter. So why should the dilated eye, behave like that?
(I lost track of this thread and my pilocarpine suggestion was off-target. I
haven't heard of a new dilating drop.)
Dilating uses more refracting surface. The lens and the cornea form
refracting surfaces. The cornea is the most common source of polyopia in the
young. Polyopia with cataracts usually arises in the crystalline lens. We're
assuming you haven't had peripheral iridotomy, RCE or fingerprint dystrophy.
The cornea forms its best refracting surface in the center, and larger
pupils encompass cornea that is much more varied. Normal corneas have
characteristic dips and peaks that are obvious on topographs. Each valley
and peak forms its own image and the multiple images don't overlay exactly
because they aren't "co-axial".
The other common cause is the lens. The proteins are at their best in the
young. After 30, the edges and the center start degrading, in different
fashions.
The most common lenticular polyopia comes from "spoking" where the lens
fibers degrade in a wagon-wheel arrangement. Each spoke shows where
refractive index has changed. With an ophthalmoscope you can wobble side to
side and see the retina jump back and forth, like looking thru wrinkled
cellophane. Later the "spokes" become opaque.
Somewhere in there is the cause of your polyopia. If it's important, it'd be
useful to experiment with a pinhole.
-MT |
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| Revival |
| Posted: Thu Jun 07, 2007 11:05 am |
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Quote: Later the "spokes" become opaque.
Umm okay but I do not understood howcome this is happen??
Why this spokes are go to opaque?
Thank,you Mike. |
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| Mike Tyner |
| Posted: Thu Jun 07, 2007 11:18 am |
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"Revival" <absolutelyinvincible@hotmail.com> wrote
Quote: Why this spokes are go to opaque?
Because the lens is a protein like egg white. Boiling an egg speeds up a
process that normally takes 60-90 years in human lenses. The aqueous bath
around the crystalline lens is one of the most stable environments in the
body.
Spoking is an early manifestation of cataract. Eventually the entire lens
turns white, causing a white pupil.
-MT |
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| Revival |
| Posted: Thu Jun 07, 2007 11:51 am |
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Thank, you.
You always explain everything me. That very kind Mike. |
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| Revival |
| Posted: Thu Jun 07, 2007 11:58 am |
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Thank, you.
You always explain thing to me Mike! that very kind |
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| Don W |
| Posted: Thu Jun 07, 2007 2:19 pm |
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Mike,
When one talks about 'spoking" the reference is to a multiple set of
spokes, I would presume (truth?). But here, for me, the images, like
these three, are offset just as one who has astigmatism might see an
offset singular image, off at some angle to the main image, and off by
a certain amount.
So, are we still talking about the typical spoking effect of the
lens?
Don W. |
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