http://img220.exs.cx/img220/4051/pic0082up.jpg


I have showed those before. My right eye sees worse, especially at
night. I believe im a -5 in left and -4.5 in right with -.5 regular
astigmastim. I also have irregular astigmastim and HOA's
At night when my pupils dilate I tested myself at 20/40 in the right
eye with two different pairs of -4.75 glasses. I can just barely see
20/40 with -4.25 glasses. I tried tilting my -4.75 glasses but it didnt
help. I also was tested at 20/40 with -4.75 glasses at the optometrist
office and he said those glasses are too weak but they arent! I have
been labled 20/25 before at eye exams. When he moved the snellen
projector down to the 20/25 line, I hesisated for 10 seconds then I
said "I cant see 20/20" and he says this is the 20/25 line! He then
said just try, guess if you have to. So I did and got like 2 or 3
right. I mean I could tell the difference between an O and an L or an F
but I wouldnt know an O from an C or an F from an P. I however can
clearly see the 20/30 line and got them all right. I sometimes wonder
how people can see 20/20(or even better) those letters are absolutely
tiny!

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your scan is crap. get it done properly so the scales can be read
properly and the images examined in some detail.

What is irregular astigmatism? who said you have it?

dr grant

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I can read them fine. Look at the colors. The oranges are steeper areas
of my cornea.

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you asked for an opinion on your topos. if you want one, you will need
to provide better data. i don't know which planet you come from, but in
my practice, blurry images are not acceptable.

dr grant

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I'm not going to bother picking on you for not knowing what irregular
astigmatism is.
The cross-section of a cornea with no astigmatism looks like an even
circular arc which is symmetric.
With astigmatism, that curve is not symmetric, it is steeper at one
end than the other but is a smooth curve.
Irregular astigmatism looks like the curve is rippled. steep, then
flat, then steep and flat again.   That is an oversimplification of
course.  Irregular astigmatism generally results when the high point
of the cornea is not centered upon the pupil (optical zone)


On 18 Nov 2005 03:19:54 -0800, "CatmanX" <grantm@connexus.net.au>
wrote:

>your scan is crap. get it done properly so the scales can be read
>properly and the images examined in some detail.
>
>What is irregular astigmatism? who said you have it?
>
>dr grant

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In article <1132117243.349843.41320@z14g2000cwz.googlegroups.com>, "Ace"
<acemanvx@yahoo.com> wrote:

Just for fun I want to pull 2 sentences you wrote:
> I also was tested at 20/40 with -4.75 glasses at the optometrist
> office and he said those glasses are too weak but they arent!

If you can only read the 20/40 line then the Rx is wrong. What gives you
the idea that it is not?

> I sometimes wonder
> how people can see 20/20(or even better) those letters are absolutely
> tiny!

Because they listen to their optometrists and wear the correct
prescription?

What are you doing messing around with all these different Rx glasses.
Prescriptions change naturally over time. In fact LASIK doesn't prevent
this. You will only be corrected for your current Rx at the time of the
procedure. Eyes can still regress or become more or less myopic
naturally. That is why you need a stable refraction for at least two
years before having LASIK done--and even that is no guarantee. You are
only 23 and it's likely that your prescription is still changing.  It's
probably getting worse. Mine got worse throughout my 20s and better
throughout my 30s.

Instead of telling your optometrist s/he is wrong, why don't you just
try the prescription s/he recommends rather than self-prescribing? You
should go to the eye doctor at least every year. You might just be
surprised to find out you can see better than you think with properly
prescribed glasses.

--
~RT

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Very well Grant, I will get a better scan soon.

Ragnar, your description of irregular astigmastim describes my corneal
topographies. My cornea is steeper in a non bowtie shape pattern so
glasses cant help me there. In the day this doesnt effect me much.
Pinholes improve my BCVA to 20/25 in each eye. Tilting my glasses does
nothing.


"If you can only read the 20/40 line then the Rx is wrong. What gives
you
the idea that it is not?"

well at that time he measured my right eye at -5 so a .25 diopter
undercorrection isnt gonna get me from 20/40 to 20/20. It may be enough
to see one or two of the 20/30 line. You think he doesnt know how to
refract me? He tried all lenses and said "is one or is two better" and
the best I could do in that right eye was read some of the 20/30 line.


"Because they listen to their optometrists and wear the correct
prescription?"


The pescription he gives me lets me see 20/30 pretty clearly in the
left eye and 20/30 to 20/40 in the right. However when I put a +1
reading glasses over them, things from 1 meter away become more clear!
Things from 6 meters only become slightly less clear.
I wear -4.25 glasses and I can see almost as well in the right eye and
my left eye sees 20/50 with a -.75 undercorrection. My old glasses are
-5(left) -4.75(right) and I see just as well as I do with my -5.5(left)
-5(right) glasses so those are now too strong! I wonder how much more
pseudomyopia I have. I am going to ask for a cycoplegic refraction to
find out how myopic I really am. I am NOT -5.5(left) -5(right)  so I
will NOT wear those glasses!

"What are you doing messing around with all these different Rx
glasses."

I wear glasses that closer fits my pescription. I am happier with -4.25
glasses than my stronger glasses I got pescribed. I also am happier
with -3.25 for the computer since its perfectly clear.

"Prescriptions change naturally over time. In fact LASIK doesn't
prevent
this. You will only be corrected for your current Rx at the time of the

procedure."


Many people are aware of this and anything is better than the
cokebottle glasses they now wear. If they regress then they just need a
thin pair of glasses for driving and plus they can put off reading
glasses.

"Mine got worse throughout my 20s and better
throughout my 30s."

I believe mines getting better now! It hasnt gotten worse for 2-3 years
and now its reversing 


"why don't you just
try the prescription s/he recommends rather than self-prescribing? You
should go to the eye doctor at least every year. You might just be
surprised to find out you can see better than you think with properly
prescribed glasses"

because I am not happy with the pescription I was pescribed 7 months
ago.

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In article <1132394410.389408.250130@g49g2000cwa.googlegroups.com>,
"Ace" <acemanvx@yahoo.com> wrote:

> because I am not happy with the pescription I was pescribed 7 months
> ago.

Sounds like you need a new optometrist. Go to one with an automatic
refractor and then you don't have to do any guessing.

PS: glasses can correct for astigmatism.

--
~RT

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I would add to that just because someone goes from uncorrected 20/20
to uncorrected 20/40 or worse is not necessarily a change in
prescription.  At older ages, that is probably due to the onset of
presbyopia which is the loss of accomodation of the natural flexible
lens within the eye.
Currently, the ONLY solution to that is to have an accomodating IOL
such as the Crystalens or Restor Lens put in.  And they are roughly
$4500 each.

By saying "more or less myopic" you are inferring that the shape is
changing.  That is most likely not the case here if the eyes are
stable.  At 23, they are going to be very stable.   If you buy pants
for a 10 year old, they are going to be too short in a year.  If you
buy pants for a 12 year old, they are going to be too short in a year.
If you buy pants for a 23 year old, you can be sure that they are
still going to be long enough when 24, 25, 26, etc.

I know what you are getting at, and it's really far to complicated to
be discussing in a forum like this.

Correcting the refractive error with surgery does not mean that one
get's 20/20 vision necessarily (although it usually does).


On Sat, 19 Nov 2005 02:13:41 GMT, RT <RTMD24@NOSPAMyahoo.com> wrote:

>In article <1132117243.349843.41320@z14g2000cwz.googlegroups.com>, "Ace"
><acemanvx@yahoo.com> wrote:
>
>Just for fun I want to pull 2 sentences you wrote: 
>
>If you can only read the 20/40 line then the Rx is wrong. What gives you
>the idea that it is not?
> 
>
>Because they listen to their optometrists and wear the correct
>prescription?
>
>What are you doing messing around with all these different Rx glasses.
>Prescriptions change naturally over time. In fact LASIK doesn't prevent
>this. You will only be corrected for your current Rx at the time of the
>procedure. Eyes can still regress or become more or less myopic
>naturally. That is why you need a stable refraction for at least two
>years before having LASIK done--and even that is no guarantee. You are
>only 23 and it's likely that your prescription is still changing.  It's
>probably getting worse. Mine got worse throughout my 20s and better
>throughout my 30s.
>
>Instead of telling your optometrist s/he is wrong, why don't you just
>try the prescription s/he recommends rather than self-prescribing? You
>should go to the eye doctor at least every year. You might just be
>surprised to find out you can see better than you think with properly
>prescribed glasses.

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Glasses do a terrible job of correcting for astigmatism.
RGP lenses or surgery are effective for astigmatism.


On Sat, 19 Nov 2005 12:42:13 GMT, RT <RTMD24@NOSPAMyahoo.com> wrote:

>In article <1132394410.389408.250130@g49g2000cwa.googlegroups.com>,
> "Ace" <acemanvx@yahoo.com> wrote:
> 
>
>Sounds like you need a new optometrist. Go to one with an automatic
>refractor and then you don't have to do any guessing.
>
>PS: glasses can correct for astigmatism.

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