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Medical Forum / General / Vision / January 2006

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Appraising the OD

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Dick Adams - 04 Jan 2006 15:20 GMT
I will appreciate some help on this.  I am trying to work out a series of
simple questions to ask during a refraction to assess the competency
of the refractor.  So far I am up to here:

1.  What is a diopter?
2.  What is a prism diopter?
3.  If not glass, what are my eyeglasses to be made of?
4.  What is meant by 20/20 vision?
5.  How can there be a 20/20 line on this chart 20 inches from my face?
6.  What about my eyes makes me nearsighted (farsighted)?
7.  How did my eyes get that way?
8.  One of my eyes is an OD and you are an OD -- how do you explain that?
9.  If I happened to be simply 2 spherical diopters nearsighted in each eye,
    thus to see print sharply at ~20 inches, should I read without
    my eyeglasses?
10. Isn't there a machine that figures out my required correction
     automatically?  Why don't you have one of those?
11. If you are not the OD, is he the one who trained you to do OD stuff?
12. How do you expect me to drive home in bright sunshine with my pupils
     the size of poker chips?

Please understand I am not asking for answers.  What I want is more questions.
Let's start with simple eyeglasses, and work our way up, if thats OK with you.

Thanks,

--
Dicky
William Stacy - 04 Jan 2006 15:57 GMT
> I will appreciate some help on this.  I am trying to work out a series of
> simple questions to ask during a refraction to assess the competency
[quoted text clipped - 19 lines]
> Please understand I am not asking for answers.  What I want is more questions.
> Let's start with simple eyeglasses, and work our way up, if thats OK with you.

Since you don't want answers, I assume you think you know all the
answers. But that assumption is incorrect since some of the questions
are nonsensical.  Like the last one.  If your pupils are that large, you
are not human, so I will not let you in my front door.

w.stacy, o.d.
Neil Brooks - 04 Jan 2006 16:16 GMT
[snip]

>Please understand I am not asking for answers.  What I want is more questions.
>Let's start with simple eyeglasses, and work our way up, if thats OK with you.

I would probably go with something simpler: credit check, enneagram,
DNA tests, and NCIC screening.  

Far more revealing....

If those aren't efficacious, I would simply offer to arm wrestle the
prospective refractor.

Good luck, Ace -- er, Dicky.

Sigh.

This one's simple, Dick: a good refractor achieves a good result.  You
may want to consider a little less emphasis on this pedantic bullshit
and a little more emphasis on how well you see through the glass.  

One practical consideration: don't be afraid to ask to be refracted
via autorefractor, trial lenses, /and/ the phoropter, asking that the
prescription be written from the one that gave /you/ the best vision.]
Signature

Live simply so that others may simply live

Mike Tyner - 04 Jan 2006 16:23 GMT
> I will appreciate some help on this.  I am trying to work out a series of
> simple questions to ask during a refraction to assess the competency
> of the refractor.  So far I am up to here:

I could conduct a refraction quite accurately in the time it takes to work
through your list, and that's just the questions you have so far.

I'm not sure how I'd feel if I had to slow down to answer a bunch of
questions, some of which have no solid answers.

-MT
Dick Adams - 04 Jan 2006 18:22 GMT
> I'm not sure how I'd feel if I had to slow down to answer a bunch of
> questions, some of which have no solid answers.

7. is the only tough one.  "We don't know" is an acceptable answer.
With that,  all of the questions could be answered in 60 seconds
or less.  (I could send you the answers by email.)

> I could conduct a refraction quite accurately in the time it takes to work
> through your list, and that's just the questions you have so far.

That seems pretty fast.  But that's good.  You'll probably need some speed to
catch up with state-of-the-art autorefractors.

"William Stacy" <wstacy@obase.net> wrote in message news:2gSuf.47104$q%.6120@newssvr12.news.prodigy.com...

> Since you don't want answers, I assume you think you know all the
> answers. But that assumption is incorrect since some of the questions
> are nonsensical.  Like the last one.  If your pupils are that large, you
> are not human, so I will not let you in my front door.

The answer to the last question is "We will give you some sunglasses for your
trip home".

The only question I don't know how to answer is #7.

"Neil Brooks" <neil0502@yahoo.com> wrote in message news:vssnr1hlko1k1qsq6u9adjl3g1nu2gourv@4ax.com...

> This one's simple, Dick: a good refractor achieves a good result.  

That's the point -- to determine which refractor is the good one,

> You may want to consider a little less emphasis on this pedantic bullshit
> and a little more emphasis on how well you see through the glass.

... to identify the good one before one pays for the spectacles (glass or
whatever).

BTW, "Pedantic" is a very crass and insulting way to refer to my bullshit.

--
Dicky
Neil Brooks - 04 Jan 2006 18:24 GMT
>BTW, "Pedantic" is a very crass and insulting way to refer to my bullshit.

Your goal should be to get a refraction that is as accurate as my use
of the word 'pedantic' in this context.
Signature

Live simply so that others may simply live

Mike Tyner - 04 Jan 2006 18:54 GMT
> That seems pretty fast.  But that's good.  You'll probably need some
> speed to catch up with state-of-the-art autorefractors.

12 minutes is plenty, except for engineers and old people.

"State-of-the-art" autorefractors have managed in the last 10 years to come
close to retinoscopy, another "objective" technique we've used for over a
century.

Retinoscopy and modern autorefractors can give quite consistent results
(same from trial to trial) but they still don't match the subjective
refraction to a satisfactory degree. If we prescribe from "objective"
results (retinoscopy or auto) about half the patients will be pretty happy,
another quarter will be a little dissatisfied, and the remaining quarter
will be totally pissed.

-MT
William Stacy - 04 Jan 2006 19:11 GMT
>The only question I don't know how to answer is #7.
>
>  

That's the easiest of all:  genetics,  environment and time...

w.stacy, o.d.
Quick - 04 Jan 2006 17:48 GMT
> Please understand I am not asking for answers.  What I
> want is more questions. Let's start with simple
> eyeglasses, and work our way up, if thats OK with you.

Ummm, this is a bit of a waste of everyone's time (those
who could answer) don't you think? You simply spewed
out some questions (some obviously silly) and asked for
more. If you actually want to know more (so you know
enough to ask the questions) why don't you start reading
at someplace like allaboutvision.com?

I think it just a weak attempt at an inane troll but I wasted
my time on the above anyway.

-Quick
otisbrown@pa.net - 04 Jan 2006 19:19 GMT
Dear Dick,

I see that the experts here have
several methods to answer your question.

1.  As counter-questions.

2.  Insult you.

3. Ask you to come if ro a "visit".

Suggest that as a layman
you don't know jack s___.

As always, enjoy our pleasant
analytical discussions about
these issues.

Or, as Charlie Chan has said,

The answers are easy -- it is
the questions that are difficult.

Best,

Otis
Mike Tyner - 04 Jan 2006 19:38 GMT
> The answers are easy -- it is
> the questions that are difficult.

Answers are easy if you make up your own, without training or experience.

-MT
acemanvx@yahoo.com - 04 Jan 2006 19:55 GMT
1.  What is a diopter?
2.  What is a prism diopter?
3.  If not glass, what are my eyeglasses to be made of?
4.  What is meant by 20/20 vision?
5.  How can there be a 20/20 line on this chart 20 inches from my face?

6.  What about my eyes makes me nearsighted (farsighted)?
7.  How did my eyes get that way?
8.  One of my eyes is an OD and you are an OD -- how do you explain
that?
9.  If I happened to be simply 2 spherical diopters nearsighted in each
eye,
    thus to see print sharply at ~20 inches, should I read without
    my eyeglasses?
10. Isn't there a machine that figures out my required correction
     automatically?  Why don't you have one of those?
11. If you are not the OD, is he the one who trained you to do OD
stuff?
12. How do you expect me to drive home in bright sunshine with my
pupils
     the size of poker chips?

answers:

1. A diopter is a unit of measurement that helps determine how much a
lens should be altered to bend or refract light rays to achieve correct
focus.

2. In some cases, your doctor may prescribe prism power to help your
eyes work more efficiently as a team an/or stay in proper alignment.

Prism is added to an eyeglass lens prescription only if a problem with
eye teaming or eye alignment is detected.

Prism is measured in special power units called prism diopters (p.d.).
Unlike the diopter units used for sphere power and cylinder power,
prism diopters are usually expressed in fractions (e.g. 1 1/2) rather
than in decimal units.

If prism power is prescribed, a second value called the prism base (or
simply, base) is included to indicate the direction (in, out, up or
down) of the prism in the lens.

Your eye doctor may prescribe base-in prism if your eyes have a
tendency to become misaligned in an outward direction.  If your eyes
tend to cross inward, base-out prism may be prescribed.  In some cases,
lateral prism (base-out or base-in prism) is prescribed for eyestrain.

Lateral prism is always prescribed in the same direction for both eyes
(i.e. base-out prism for both eyes or base-in prism for both eyes).
Sometimes lateral prism is prescribed for one eye only.

Vertical prism (base-up and base-down prism) is used for vertical eye
misalignments or difficulties in maintaining the eyes in comfortable
vertical alignment. Vertical prism is prescribed in opposite directions
for the two eyes (base-up prism for one eye and base-down prism for the
other).  Sometimes vertical prism is prescribed for one eye only.

3. Glasses are often made of cr-39 or some other plastic but super high
index 1.8 and 1.9 uses glass

4. 20/20 is the standard for "normal" vision and a level of very, very
good vision where the eye is usually plano and doesnt have too many
high order aberrations and no other pathalogies.

5. This is the nearpoint chart to test for presbyopia. I am not 20/20
on the near chart unless I take my glasses off.

6. Otis is the expert on what makes one nearsighted :)

7. Genetics and bad vision habits

8. OD stands for Ocular Dexter
or right eye and OS stands for Ocular Sinister meaning left eye.

9. This is a big yes!!!!!!! I could make a whole book on why. Simply
put, you are nearsighted and see fine from near without glasses.

10. This is autorefractor and its an estimate. its best to get a
manifast refraction

11. I am not an OD but my knowlege comes from reading :)

12. sunglasses helps. Best to have someone else drive you!
William Stacy - 04 Jan 2006 20:17 GMT
>12. sunglasses helps. Best to have someone else drive you!
>  

Not a bad job, and your last answer is better, and more correct than
Dicky's.

But I think he wanted more questions.  I think he thinks he has all the
answers.

w.stacy, o.d.
Mike Tyner - 04 Jan 2006 20:37 GMT
> 11. I am not an OD but my knowlege comes from reading :)

So according to Dick, you're qualified to get your own phororaptor and go to
work doing manifast refractions!

-MT

> 1.  What is a diopter?
> 2.  What is a prism diopter?
[quoted text clipped - 80 lines]
>
> 12. sunglasses helps. Best to have someone else drive you!
William Stacy - 04 Jan 2006 22:31 GMT
>get your own phororaptor and go to
>work doing manifast refractions!
>
>-MT
>  

Og,  man *have* to work fast when phororaptor breathing down neck...
otisbrown@pa.net - 04 Jan 2006 20:02 GMT
Dear Dicky,

Here are some staight answers -- where
possible.  Have you gotten any
from the experts?

Please note, these are striclty
engineering answers, not
medical answers.

Dick> I will appreciate some help on this.

Dick> I am trying to work out a series of simple questions to ask
     during a refraction to assess the competency of the
     refractor.

[Comment:  If you had your own trial-lens kit -- and some
     experience -- you could do it yourself.  The true-medical
     part is essential -- and you can not do that.  Medical means
     checking for incipient detached retina, glaucoma, RP,
     Macular degeneration, and things of that nature.

Dick> But determining the refractive state of the natural primate
     eye is just a matter of putting a lens in front of your
     face, and finding a lens that makes your vision sharpest
     (i.e., Best Visual Acuity.)

Dick> So far I am up to here:

1.  What is a diopter?

a.  A unit of optical power.  A +1 diopter lens will have a focal
     length of 1 meter.  A +2 diopter lens a length of 1/2 meter.
     The average human eye has a total power of about 60 diopters
     and a length of 2.4 cm.

2.  What is a prism diopter?

a.  The ability of a prism to change the direction of an image.
     (My cat is sitting on my lap -- so I will have to get a more
     complete description at a later date.)

3.  If not glass, what are my eyeglasses to be made of?

a.  Mostly plastic.  Others can add their commentary.

4.  What is meant by 20/20 vision?

a.  The ablity to read 0.9 cm letters at 6 meters in room
     illumination.  Or letters that subtend 5 minutes of arc at 6
     meters.  The original was 3/8 inch letters at 20 feet.
     Since BVA (with a minus) was mostly at that level, that
     became the "standard".

5.  How can there be a 20/20 line on this chart 20 inches from my
     face?

a.  If you use the 5 minute-of-angle, then you can calculate the
     size of the letters at 20 inches.  20/20 at 20 inches does
     not make scientific sense.

6.  What about my eyes makes me nearsighted (farsighted)?

a.  The refractive state of the primate eye changes as the visual
     enviroment is changed.  In the wild the natural primate eye
     has a postive refractive state of from 0.0 to +2 ditpers
     (gaussian distribution.) If you live in the "open" yur eyes
     will have a positive refraction.

b.  Move your eyes indoors, and the natural eye will change its
     refractive state in that direction.  Keep the eye in that
     "near" envrioment, and the refraction goes from "plus" to
     "minus", A natural process.  There is not "cause" to it.

7.  How did my eyes get that way?

a.  How many years did you spend in school?

8.  One of my eyes is an OD and you are an OD -- how do you
     explain that?

OD (Dexter) Right eye

OS (Sinister) Left eye

OD Optometry Doctor

9.  If I happened to be simply 2 spherical diopters nearsighted in
     each eye, thus to see print sharply at ~20 inches, should I
     read without my eyeglasses?

a.  Majory opinion?  No

b.  Second opinoin?  Yes

10.  Isn't there a machine that figures out my required correction
     automatically?  Why don't you have one of those?

a.  Provided you paralyize your eyes, you can use an
     "auto-refractor".  Accuracy is very poor.  The OD are much
     better with there phoropter and Snellen at 20 feet.
     (However they tend to "over-prescribe.)

b.  Quite of few do have the auto-refractor -- but they wisely
     don't rely on it.  (I hope.)

11.  If you are not the OD, is he the one who trained you to do OD
     stuff?

a.  OD are trained by other ODs in OD college.    This costs about
     120 K and 4 years of their life.    Only ophthalmologists and
     optometrists are permitted to "measure" your refractive
     state and write a "prescription".

12.  How do you expect me to drive home in bright sunshine with my
     pupils the size of poker chips?

a.  Bring your wife along.

b.  Don't drive.

c.  A dialated eye is about 8 mm, unless you are using a small
     poker chip.

Dick> Please understand I am not asking for answers.

Otis> ????.  That is an interesting statement.    Then why ask the
     questions?  Are you afraid some professional will insult you
     -- by evading the question.

Otis> What I want is more questions.

Otis> Fine.  How many answeers have you received thus far?

Otis> Let's start with simple eyeglasses, and work our way up, if
     thats OK with you.

Otis> It is OK with me, after all, that is what science is all
     about -- and this is a SCIENCE.med.vision group.    Just do
     not get the scientific questions and answers mixed up with
     MEDICAL questions and answers.

Otis> Also, when you ask the correct questions about the dynamic
     performance of the natural eye -- you may not like the
     "answers" you receive.  Witness all the "Hoop-Laa" the goes
     on on sci.med.vision.

Best,

Otis

Dicky
A Lieberman - 04 Jan 2006 23:25 GMT
> 9.  If I happened to be simply 2 spherical diopters nearsighted in
>       each eye, thus to see print sharply at ~20 inches, should I
[quoted text clipped - 3 lines]
>
> b.  Second opinoin?  Yes

Dear Dickey,

Please disregard Otis's postings.  

He is not in the medical profession and the **second opinion** is not in
the position to give medical advice.

Thank you!

Allen
Dick Adams - 05 Jan 2006 03:49 GMT
> Dear Dickey,
> Please disregard Otis's postings.

He's a funny guy.  I can figure out what to believe.  So can most
people, I think.  All of these Otis warnings seem unnecessary.  

With regard to his reaction to my question:
> > > If I happened to be simply 2 spherical diopters nearsighted in
> > > each eye, thus to see print sharply at ~20 inches, should I
> > > read without my eyeglasses?
namely that his opinion AKA "second opinion" would be affirmative,
I must say that I don't see why a person with a natural "add 2.0"
should not read without eyeglasses.  Further, I would probably be
in agreement with Otis in feeling that such a person should probably
consider not using his -2.0 spheres for reading.  The situation would
be more complicated for a myope with a need for dissimilar
corrections, including cylinder, for right and left.  My guess is that
much eyestrain is due to trying to superimpose and focus dissimilar
images.  So it would be a rare myope who could be advised to read
without eyeglasses.  Similarly, for a person with dissimilar eyes, but
corrected to be similar, reading with (single-vision) distance eyeglasses
might be preferable to naked-eye reading.

Furthermore, I do not see any reason why a young person feeling
his eyes may be strained by much close work should not consider
using reading glasses, according to prescription if his eyes need it.
Maybe that would forestall myopia -- who knows?!  I do not see how
it could hurt.  That is not exactly to say that I agree with Otis that
"The Plus" is good for everybody, whatever "The Plus" might be taken
to mean.

I personally feel that reading through bifocals, or trifocals, or continuous
or whatever, is a big nuisance, and quite conducive to eyestrain, neckstrain,
and asspain.  But the markup on complicated eyeglasses is higher, that the
need for "professional" upkeep is higher, so people will continue to be
encouraged to order them particularly if they have some insurance that
offsets the cost.

--
Dicky
Mike Tyner - 05 Jan 2006 05:25 GMT
> should not read without eyeglasses.  Further, I would probably be
> in agreement with Otis in feeling that such a person should probably
> consider not using his -2.0 spheres for reading.

The thing is, many ODs, including me, are fine with it. I find it tragic
when a parent has the notion that children MUST wear glasses full time. It's
such a waste of energy to enforce this silly rule when there are many more
substantial issues for parents to focus on.

> Furthermore, I do not see any reason why a young person feeling
> his eyes may be strained by much close work should not consider
> using reading glasses, according to prescription if his eyes need it.

Nor do we. But insisting children wear "reading glasses" usually leads to
embarrassing situations because the next doctor down the line (often an MD)
says "that's ridiculous."

> Maybe that would forestall myopia -- who knows?!

We know it won't make enough difference that we should be spouting the
"second opinion" at every child and every parent.

> I personally feel that reading through bifocals, or trifocals, or
> continuous
> or whatever, is a big nuisance, and quite conducive to eyestrain,
> neckstrain,
> and asspain.

That's why I uniformly suggest that myopes in their 30's considering LASIK
shoot for "planned undercorrection." There's very little a doctor can
prescribe that's better than a natural -2.00 of myopia.

> But the markup on complicated eyeglasses is higher, that the
> need for "professional" upkeep is higher, so people will continue to be
> encouraged to order them particularly if they have some insurance that
> offsets the cost.

We have several good bifocal studies that show they don't offer substantial
benefit to asymptomatic young people. So where are these "professionals"
recommending bifocals for non-presbyopes?

-MT
RT - 05 Jan 2006 14:10 GMT
> We have several good bifocal studies that show they don't offer substantial
> benefit to asymptomatic young people. So where are these "professionals"
> recommending bifocals for non-presbyopes?

My 9 year old son was prescribed bifocals. I don't have his script in
front of me, but both eyes are around -7.50 with 1D of astig. He has +3.
The reason being is that when wearing the -7's he reads over the tops of
his glasses about 3 inches from his face because he cannot focus in his
glasses at a comfortable distance to read. They seem to be working,
meaning that he can now read and do his homework with his glasses on,
but sometimes I do catch him reading over the tops of his glasses. He
does that consistently if he wants to examine something close up. He has
contacts too (Proclear) and in those he's forced to read from a greater
(and probably more correct) distance. He doesn't like wearing them for
that reason because he can't bring things up to the tip of his nose like
he's used to.

He's certainly not a presbyope!

Signature

~RT

RT - 05 Jan 2006 14:14 GMT
> > We have several good bifocal studies that show they don't offer substantial
> > benefit to asymptomatic young people. So where are these "professionals"
[quoted text clipped - 14 lines]
>
> He's certainly not a presbyope!

BTW: his glasses are progressives. he adapted to them very quickly.

Signature

~RT

Mike Tyner - 05 Jan 2006 15:45 GMT
> MT We have several good bifocal studies that show they don't offer
> substantial
[quoted text clipped - 15 lines]
>
> He's certainly not a presbyope!

No, but he has symptoms- he's uncomfortable reading through -750. My comment
hinged on the word "asymptomatic."

-MT
Dick Adams - 05 Jan 2006 14:17 GMT
> [ ... ]

> We have several good bifocal studies that show they don't offer substantial
> benefit to asymptomatic young people. So where are these "professionals"
> recommending bifocals for non-presbyopes?

Bifocals were used in one group against myopia in a mentioned study, without
reported benefit.

The conundrum returns: if myopia results from close work, and close work can
be optically moved to distant, why can't myopia be prevented/forestalled with
appropriate eyeglasses?

For bifocals, a simple answer is that they are a big pain in the a.s to try to
read through, and kids hate to wear eyeglasses in the first place, and probably
did not wear the glasses when they were not being watched.

Another defect in the studies may have to do with vergence:  base-out prisms
would be needed to complete the illusion that the book is at visual infinity.

Another possibility, which maybe everybody but me has considered, is that
being driven to study, and possibly to "fail", could cause a spastic ciliary
response as well as spastic colon.  For instance, what do you suppose the
focusing mechanism is doing during REM (rapid eye movement)?  Has
anybody but me ever dreamed of looking at a page but not being able to make
out the words?

--
Dicky Magooeyes
Mike Tyner - 05 Jan 2006 16:06 GMT
> The conundrum returns: if myopia results from close work, and close work
> can
> be optically moved to distant, why can't myopia be prevented/forestalled
> with
> appropriate eyeglasses?

It _is_ a conundrum, one that forces us to examine the possibility that
accommodation, the logical culprit, in reality doesn't play a significant
role in stimulating myopia. Other evidence includes the fact that
uncorrected hyperopes accommodate vigorously but don't get nearsighted,
while myopes accommodate less than anybody but continue to get myopic.

> Another defect in the studies may have to do with vergence:  base-out
> prisms
> would be needed to complete the illusion that the book is at visual
> infinity.

It's a logical avenue to investigate, but for two things: 1) exophores must
exert additional convergence to maintain single binocular vision, but as a
group I don't think they are more prone to myopia and 2) the additional
convergence required for near vision is trivial compared to the normal range
of vergence ability.

> Another possibility, which maybe everybody but me has considered, is that
> being driven to study, and possibly to "fail", could cause a spastic
> ciliary
> response as well as spastic colon.

Yes but accommodative spasm must be separated from "real" myopia and as
we've seen, excess accommodation doesn't make the eye grow longer.

-MT
otisbrown@pa.net - 05 Jan 2006 18:12 GMT
Dear Dicky,

Subject:  Reading of the results of the
"plus" (bifocal) studies.

There are two "readings" of this type of
study.  Since there is NO AGREEMENT,
then say "majority opinoin", i.e.,
1. a lens has no effect on the refractive
state of the natural primate eye,
and 2. The natural eye WILL change
its refactive state (as a classical
scientific experiment) when you
place a mild -3 diopter lens on a
population of dyds.

Our discussions thus far have proven
the need for a second-opinon on this subject.

Further I do not support the "bi-focal"
concept, i.e., using BOTH a minus and
plus.  The minus (on the threshod) will
in fact prevent "clearing".  Just work
with the simple plus -- if you have
a strong motive to do so.  The
issue remains open.  The "motivation"
to use the plus at the threshold is
a serious problem -- because
it depends completely on the
judgment of the person who
is actually using the plus -- and
monitoring his own eye chart.

To further respond:

Mike> We have several good bifocal studies that show they don't offer
substantial
> benefit to asymptomatic young people.

Otis>  Given that the bifocal is very expensive,
and not understood -- I would agree.  But
to day that all bifocal studies indicate
NOTHING is something I can not agree with.
Just state that your majority opinion.

So where are these "professionals"
recommending bifocals for non-presbyopes?

Otis>  It is easy to make a "recommendation".
The real issue is how that "recommendation"
is taken or "accepted".  And is the
issue pure-science, or is it medicine?

Dicky> Bifocals were used in one group against myopia in a mentioned
study, without
reported benefit.

Otis>  Simply not the case.  The Oakley-young
study showed what the effect could be
if the plus were used at the threshold,
i.e., effective PREVENTION could be
achieved.  The real show-stopper it
the parents and kids.  But just say that
the second-opinon (from the Oakley-Young
study) is that the plus must be used before
the situation gets out-of-hand.  But I
do agree that decision or choice will
depend on the person himself.

Dicky> The conundrum returns: if myopia results from close work, and
close work can
be optically moved to distant, why can't myopia be
prevented/forestalled with
appropriate eyeglasses

Otis>  As Mike pointed out -- he can not
do it.  It is going to depend on the parents.
If fact, modifying the child's reading
"habits" is crucial -- if there is to be
any "change" in this situation.  But
that is like modifying a child's habits
in stuffing his face and becomming
obese.   The problem is not "medical"
it is the profound "bad habits" of this
kid -- and the "doctor" has NO COTROL
OVER IT.  This is equally true
for the kid who has his nose 4 inches
(-10 diopters) from the page.  The
kid needs to be "swatted" at home
or at school when he does that.
True prevention starts at home.
And that is only the FIRST STEP.

But that "understanding" transferrs
a lot of responsibility to the person.

Best,

Otis
Mike Tyner - 05 Jan 2006 18:49 GMT
> Our discussions thus far have proven
> the need for a second-opinon on this subject.

Isn't it nice to feel needed?

> Otis>  Given that the bifocal is very expensive,
> and not understood -- I would agree.  But

What part of bifocals don't you understand?

> Otis>  It is easy to make a "recommendation".
> The real issue is how that "recommendation"
> is taken or "accepted".  And is the
> issue pure-science, or is it medicine?

Whoosh. (That's the point of a discussion flying right past you.)

> Otis>  As Mike pointed out -- he can not
> do it.  It is going to depend on the parents.

Whoosh.

> If fact, modifying the child's reading
> "habits" is crucial -- if there is to be

Yes. All myopia results from reading at 4 inches.

> But that "understanding" transferrs
> a lot of responsibility to the person.

Oh. Now I get it. Myopia results from misunderstanding and irresponsibility.
It's their own fault.

-MT
otisbrown@pa.net - 05 Jan 2006 18:12 GMT
Dear Dicky,

Subject:  Reading of the results of the
"plus" (bifocal) studies.

There are two "readings" of this type of
study.  Since there is NO AGREEMENT,
then say "majority opinoin", i.e.,
1. a lens has no effect on the refractive
state of the natural primate eye,
and 2. The natural eye WILL change
its refactive state (as a classical
scientific experiment) when you
place a mild -3 diopter lens on a
population of dyds.

Our discussions thus far have proven
the need for a second-opinon on this subject.

Further I do not support the "bi-focal"
concept, i.e., using BOTH a minus and
plus.  The minus (on the threshod) will
in fact prevent "clearing".  Just work
with the simple plus -- if you have
a strong motive to do so.  The
issue remains open.  The "motivation"
to use the plus at the threshold is
a serious problem -- because
it depends completely on the
judgment of the person who
is actually using the plus -- and
monitoring his own eye chart.

To further respond:

Mike> We have several good bifocal studies that show they don't offer
substantial
> benefit to asymptomatic young people.

Otis>  Given that the bifocal is very expensive,
and not understood -- I would agree.  But
to day that all bifocal studies indicate
NOTHING is something I can not agree with.
Just state that your majority opinion.

So where are these "professionals"
recommending bifocals for non-presbyopes?

Otis>  It is easy to make a "recommendation".
The real issue is how that "recommendation"
is taken or "accepted".  And is the
issue pure-science, or is it medicine?

Dicky> Bifocals were used in one group against myopia in a mentioned
study, without
reported benefit.

Otis>  Simply not the case.  The Oakley-young
study showed what the effect could be
if the plus were used at the threshold,
i.e., effective PREVENTION could be
achieved.  The real show-stopper it
the parents and kids.  But just say that
the second-opinon (from the Oakley-Young
study) is that the plus must be used before
the situation gets out-of-hand.  But I
do agree that decision or choice will
depend on the person himself.

Dicky> The conundrum returns: if myopia results from close work, and
close work can
be optically moved to distant, why can't myopia be
prevented/forestalled with
appropriate eyeglasses

Otis>  As Mike pointed out -- he can not
do it.  It is going to depend on the parents.
If fact, modifying the child's reading
"habits" is crucial -- if there is to be
any "change" in this situation.  But
that is like modifying a child's habits
in stuffing his face and becomming
obese.   The problem is not "medical"
it is the profound "bad habits" of this
kid -- and the "doctor" has NO COTROL
OVER IT.  This is equally true
for the kid who has his nose 4 inches
(-10 diopters) from the page.  The
kid needs to be "swatted" at home
or at school when he does that.
True prevention starts at home.
And that is only the FIRST STEP.

But that "understanding" transferrs
a lot of responsibility to the person.

Best,

Otis
otisbrown@pa.net - 06 Jan 2006 01:31 GMT
Dear Dicky,

If you ever wonder why no OD will ever explain true-prevention,
you might read Neil Brooks slander against me.

If I were an OD -- I would not put myself at risk
for your long-term visual welfare. Would you?

But I have acted to "protect" my nephew -- to
get him to face and make this difficult choice
that has life-time visual consequences.

Would you like you intelligence rerspected
in this matter -- what ever your choice.

I know I would -- but that is
NEVER GOING TO HAPPEN -- with
idiots like Neil Brooks loose in this land.

All the other ODs are "off the hook".  They
can do absolulty NOTHING for prevention
for this reason alone.  This
is not science -- this is stupidity.

Best,

Otis
Neil Brooks - 06 Jan 2006 08:30 GMT
>If you ever wonder why no OD will ever explain true-prevention,
>you might read Neil Brooks slander against me.

Now you're just consistently replying to your own repititious posts.
A lunatic, trapped in Waynesboro, Pennsylvania, alone with his fear.

"What have I done??"  But ... but ... but ... I fixed Keith's eyes,
didn't I?  Isn't /that/ enough to prove the case??  Shouldn't I be
able to go out and prescribe to others??

Unfortunately, Uncle Otie, the OD's on this site have years and years
and years of education and clinical practice.  They also have a thing
called 'liability' that you didn't *think* you had.

But you do ... and the chickens (since you're such an aphoristic old
coot) are coming home to roost.

I just hope you have sufficient pluck (ha-ha.  I made a funny!)
Signature

Live simply so that others may simply live

otisbrown@pa.net - 06 Jan 2006 14:41 GMT
Neil, you are an idiot!

Neil>  Ijust hope you have sufficient pluck (ha-ha.  I made a funny!)

But, I will write up the effect of you crazy reaction to
scientific truth concerning the behavior of the natural eye.

Again, If I spent 100K in college, and then 120 K for
four years in OD school -- I would not put myself
at risk to help ANYONE with true-prevention with
the plus.

You make an absolute case why no OD will ever
help the "public" with true-prevention for fear
of the loss of $240 K, and eight years of
their life.

No, I can never expect them to help ANYONE
WITH TRUE-PREVENTION, but it must be
absolutly clear to the person on the
threshold WHY they get no help.

And you and your legal threats are the reason.

Copy to Keith, so he understands the
why he had little choice but to "take control" and
clear his distant vision to always pass
all LEGAL VA requirments.  At last
report he is above the 20/20 line.

How may parents have kids with
"stair-case" myopa -- now wearing
minus-lens coake bottles -- wondering
how their kids "got that way -- and why".

Think about it.

Otis
Neil Brooks - 07 Jan 2006 16:51 GMT
>Neil, you are an idiot!

Gosh.  Thanks, Uncle Otie.  I have severe dry eye.  You making me bawl
so profusely has brought much needed tears.  How can I ever repay you?

>But, I will write up the effect of you crazy reaction to
>scientific truth concerning the behavior of the natural eye.

I tried the Google translator, but can't figure out what that means.

>Again, If I spent 100K in college, and then 120 K for
>four years in OD school -- I would not put myself
>at risk to help ANYONE with true-prevention with
>the plus.

But since you didn't think you would incur any liability, you have no
problem with the notion of practicing medicine WITHOUT the benefit of
schooling or education.

>And you and your legal threats are the reason.

I've made no threats.  Only promises.  And I delivered.  Suffer,
Bi*tch!

>Copy to Keith, so he understands the
>why he had little choice but to "take control" and
>clear his distant vision to always pass
>all LEGAL VA requirments.  At last
>report he is above the 20/20 line.

Ah, Keith.  The much fabled Keith.  Your 'great white hope' for
proving your thesis.  How IS ol' Keith these days, Uncle Otie?

>How may parents have kids with
>"stair-case" myopa -- now wearing
>minus-lens coake bottles -- wondering
>how their kids "got that way -- and why".

Was that supposed to be "coke" or "cake?"

Nobody has any idea what you're talking about.

Saw the letter from the State of PA, didn't you.  How's your blood
pressure, Uncle Otie?  Call your lawyer yet?  The walls closing in??
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Quick - 06 Jan 2006 18:12 GMT
> But you do ... and the chickens (since you're such an
> aphoristic old coot) are coming home to roost.
>
> I just hope you have sufficient pluck (ha-ha.  I made a
> funny!)

Yes, but it could have been a lot better.  Maybe something
about the chickens being able to see their way home now.

-Quick
Neil Brooks - 06 Jan 2006 18:45 GMT
>> But you do ... and the chickens (since you're such an
>> aphoristic old coot) are coming home to roost.
[quoted text clipped - 4 lines]
>Yes, but it could have been a lot better.  Maybe something
>about the chickens being able to see their way home now.

I'll give you that, but it /was/ getting to be nearly 1am....
Signature

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otisbrown@pa.net - 04 Jan 2006 20:48 GMT
Dear Dicky,

I have a question for you.

1.  What is the biggest block to
preventing the development
of a negative refractive state?

The optometrist or,

The patient?

2.  If an second-opinion offered
you the peventive alternative what
would you do?

a.  Investigate the natural eye's proven
behavior more completely.

b.  Thank him, and state that you
only want your eye chart made
very sharp.

c. Run screaming from the
shop -- and report him to
the local OD Board.

d.  After you get stair-case
myopia from the minus -- would
you go back the the second-opinion
OD and appoligize for tuning
him it to the OD Board?

Best,

Otis
Mike Tyner - 04 Jan 2006 21:05 GMT
> 1.  What is the biggest block to
> preventing the development
> of a negative refractive state?
>
> The optometrist or,
> The patient?

I've tried to resist but I can't help myself. I must ask you a question
using exactly the same logic:

After you molest children, do you a) pop open a beer and turn on the TV or
b) turn yourself in for psychological evaluation and treatment?

-MT
Neil Brooks - 04 Jan 2006 21:45 GMT
>> 1.  What is the biggest block to
>> preventing the development
[quoted text clipped - 8 lines]
>After you molest children, do you a) pop open a beer and turn on the TV or
>b) turn yourself in for psychological evaluation and treatment?

Uh-uh, Mike.  Trick question.  Your question *assumes* that he ever
takes a break from molesting children....

[Too smart for /that/ one]
Signature

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otisbrown@pa.net - 05 Jan 2006 17:51 GMT
Dear Mike,

Thanks for your "flip" remark.

Perhaps I should ask the question:

Who is more responsible for child obesity:

1.  The doctor or,

2.  The  parents and child.

[Please consider the law of conversation of energy
in your answer -- i.e., physics.]

and

Who is ultimately responsible?

Best,

Otis

> > 1.  What is the biggest block to
> > preventing the development
[quoted text clipped - 10 lines]
>
> -MT
Mike Tyner - 05 Jan 2006 18:42 GMT
> Perhaps I should ask the question:
>
> Who is more responsible for child obesity:

We can always rely on you to miss the point. Whoosh!

-MT
Dick Adams - 04 Jan 2006 21:30 GMT
> Dear Dicky,
>
[quoted text clipped - 3 lines]
> preventing the development
> of a negative refractive state?

Do you mean to ask, what is the main reason that people do not make
some effort to avoid becoming myopic?

The answer is that nobody knows for sure how to prevent myopia.  So
if you are a kid, and you would like to try to avoid becoming progressively
myopic, you can't really get any good answers.

> 2.  If an second-opinion offered
> you the preventive alternative what
> would you do?

How can a second opinion offer an opinion?  An opinion comes from
a person, not from an opinion.

> d.  After you get stair-case
> myopia from the minus -- would
> you go back the the second-opinion
> OD and appoligize for tuning
> him it to the OD Board?

Me, I got implants.  I am quite fine for now.  But you have to wait until you
are old for those if you expect Medicare to pay for them.  But I really think
that my life would have been better if I had been able to read print for more than
20 minutes at a time, see the blackboard in classes, and recognize people on
the other side of the street.  That I can see the 20/15 line with implants and mild
eyeglasses suggests that my vision care over the years could have been better.

I guess I know what you mean by "the second-opinion OD" but it is a dumb
way to refer to yourself, if that is what you are doing, because, if we can believe
you, you are an engineer and not an optometrist.

I don't think turning some one over to some OD Board would do much good
because it is doubtful that ODs can make trouble for people who are not ODs,
and maybe not for those, either.  It takes somebody like the President to misuse
power he is not accorded.

--
Dicky
RM - 05 Jan 2006 02:12 GMT
>> Dear Dicky,
>>
[quoted text clipped - 3 lines]
>> preventing the development
>> of a negative refractive state?

>Do you mean to ask, what is the main reason that people do not make
>some effort to avoid becoming myopic?

>The answer is that nobody knows for sure how to prevent myopia.

Ding ding ding ding!
Dicky, you get a gold star.
This is the point Otis doesn't get.  Everybody would like to prevent myopia.
Trouble is, nobody knows how to do it!  Plus doesn't work, bifocals don't
work, RGPs don't work.  Otis thinks that if you just try hard enough, you
can do it.
Ready, fire, aim right Otis.

>I guess I know what you mean by "the second-opinion OD" but it is a dumb
>way to refer to yourself, if that is what you are doing, because, if we can
>believe
>you, you are an engineer and not an optometrist.

You're getting smarter still.

>It takes somebody like the President to misuse
>power he is not accorded.

Bingo.  Excellent.  Dicky, you are my hero of the day.
otisbrown@pa.net - 05 Jan 2006 05:00 GMT
Dear Dicky,

1.  Bush had exceeded his authority -- but a wide margin.
The worst part is holding people with out charges, and
without trial.  That is what the Frech Revolution was about.

Were is the constitution?

Were is the bill of rights?

Were is the American Civil Liberties?

Out to lunch?

2.  The constitution requires a DECLARATION OF WAR -- if
that is what we want.  Were it is?

Since we are not at war, then how in the word does
Bush claime "War Powers"?

Where are the bill of particularls about how greviously
Iraq attacked us -- so we were FORCED to declare war?

Sorry for the political statement -- but some one
kicked it off.

Our arguments about the eyes mean nothing --- compared
to this political problem.  Have you written your
senator yet?

Sorry -- I can not talk about the eyes.

Do you think the CIA and NSA monitor our conversations?

Oops -- I hear a knock at the door.......

============

> > Dear Dicky,
> >
[quoted text clipped - 42 lines]
> --
> Dicky
p.clarkii@gmail.com - 05 Jan 2006 05:04 GMT
otis,
i like your politics...
finally we've found common ground
William Stacy - 05 Jan 2006 05:21 GMT
> otis,
> i like your politics...
> finally we've found common ground

Me too. I think we should adjourn to the local coffee shop.

bill
Neil Brooks - 04 Jan 2006 21:44 GMT
Otis:

I can't believe even you had the temerity and audacity to make those
kinds of threats.  Given the post-9/11 era, and the current state of
wiretapping/monitoring by the government, I'd strongly caution you
that threats of that sort can only lead to trouble.

I'm advising you to cease and desist, and will not discuss this
subject with you any further.

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MS - 29 Jan 2006 05:11 GMT
Is this some kind of joke?? Not very funny. It's worse though, if not
intended as a joke, if you really intend to ask those questions at your eye
exam, and take them seriously.

I will appreciate some help on this.  I am trying to work out a series of
simple questions to ask during a refraction to assess the competency
of the refractor.  So far I am up to here:

1.  What is a diopter?
2.  What is a prism diopter?
3.  If not glass, what are my eyeglasses to be made of?
4.  What is meant by 20/20 vision?
5.  How can there be a 20/20 line on this chart 20 inches from my face?
6.  What about my eyes makes me nearsighted (farsighted)?
7.  How did my eyes get that way?
8.  One of my eyes is an OD and you are an OD -- how do you explain that?
9.  If I happened to be simply 2 spherical diopters nearsighted in each eye,
    thus to see print sharply at ~20 inches, should I read without
    my eyeglasses?
10. Isn't there a machine that figures out my required correction
     automatically?  Why don't you have one of those?
11. If you are not the OD, is he the one who trained you to do OD stuff?
12. How do you expect me to drive home in bright sunshine with my pupils
     the size of poker chips?

Please understand I am not asking for answers.  What I want is more
questions.
Let's start with simple eyeglasses, and work our way up, if thats OK with
you.

Thanks,

--
Dicky
Dick Adams - 29 Jan 2006 06:02 GMT
> Is this some kind of joke?? Not very funny.

Some of my experience over the last several decades has been with HMO doctors
who train their own phoropter flipper-floppers.  I started naive about this, and
trusting.  But there seem to be at least as many theories about how eyes work and
what's the best way to correct them as there are home-grown eye techs.  I suppose
one could ask for evidence of professional training, but the test is quick and kind
of fun, in a macabre way.  For instance, most techs around here, and some OD's
do not know how a diopter is defined, or what "add" it takes for presbyopic eyes to
focus a CRT screen at say 27 inches.  Almost no one any more knows how a
prism diopter is defined.  The stupidity of wraparound eyeglasses is another
example -- I had a big argument with an OD about getting new a frame flattened,
and recently needed to flatten a mail-order pair (preferable to arguing with an
"expert").

It is not funny to find a 50% chance that prescription eyeglasses need redoing,
particularly when one made to feel argumentative and unreasonable, and required
to pay for the rework.  Frankly, it seems to me that the prescribing and making of
simple eyeglasses is getting to be a lost art.

--
Dicky
Neil Brooks - 29 Jan 2006 15:31 GMT
Dick(less) Adams" wrote:

>I will appreciate some help on this.  I am trying to work out a series of
>simple questions to ask during a refraction to assess the competency
[quoted text clipped - 21 lines]
>Let's start with simple eyeglasses, and work our way up, if thats OK with
>you.

"MS" replied:

>Is this some kind of joke?? Not very funny. It's worse though, if not
>intended as a joke, if you really intend to ask those questions at your eye
>exam, and take them seriously.

Add Dick(less) Adams to your killfile.  You'll sleep better.
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Dick Adams - 29 Jan 2006 16:02 GMT
In news:rqnpt1pkss47km6qqobb14766dkh5j4833@4ax.com
"Neil Brooks" <neil0502@yahoo.com> under a full requote of this
thread, tersely added:

> Add Dick(less) Adams to your killfile.  You'll sleep better.

Have you got any imagination at all, you empty-headed, brown-
nosing dolt?

Ace and Otis have better style and do much snappier posts
than you.

--
Dicky

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