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Medical Forum / General / Vision / May 2007

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Snellen Chart

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Rich - 25 May 2007 17:54 GMT
Can anybody direct me to a site from which I might print a Snellen Chart
for reading distances?  Probably one in PDF format, so the size of the
type is nicely preserved... but I would welcome whatever is available.

I'm recovering (nicely) from cataract surgery and IOL implant, and want
to start experimenting to determine what reading correction I will
require, now that my eyes are (close to) 20/20 but I am dependent on
depth-of-field for intermediate and near vision.

(Yes, yes, I know that my ophthalmologist will do this for me when my
eyes stabilize in a few weeks, but I'd like to experiment at home in the
mean time!)

BTW, I wrote a few weeks ago about my first surgery leaving me with a
constricted pupil... that cleared up after a few days.  I seem to have a
similar symptom in my second eye, but given the experience, I fully
expect that to be fully functional again, soon.

Rich
otisbrown@pa.net - 25 May 2007 18:21 GMT
Sure Rich.  Just click here:

http://www.smbs.buffalo.edu/oph/ped/IVAC/IVAC.html

Then click on "Display".

Read at 20 feet.

If you have some questions feel free to ask.

Otis

> Can anybody direct me to a site from which I might print a Snellen Chart
> for reading distances?  Probably one in PDF format, so the size of the
[quoted text clipped - 15 lines]
>
> Rich
otisbrown@pa.net - 25 May 2007 18:28 GMT
Rich, here are some hard-copy charts for your use.

http://www.i-see.org/eyecharts.html

As a quick check, the 20/60 line should be 1 inch high.

All the other letters will be correct (proportion) if the
20/60 line is right.

Enjoy,

Otis

On May 25, 1:21 pm, "otisbr...@pa.net" <otisbr...@pa.net> wrote:
> Sure Rich.  Just click here:
>
[quoted text clipped - 29 lines]
>
> - Show quoted text -
p.clarkii@gmail.com - 26 May 2007 02:54 GMT
On May 25, 1:21 pm, "otisbr...@pa.net" <otisbr...@pa.net> wrote:
> If you have some questions feel free to ask.

and you'll feel free to respond even though you don't know a damn
thing about what you write about.

no education in vision.  no clinical experience in vision.  but maybe
you stayed at a Holiday Inn Express last night!
Ms.Brainy - 26 May 2007 20:08 GMT
> On May 25, 1:21 pm, "otisbr...@pa.net" <otisbr...@pa.net> wrote:
> If you have some questions feel free to ask.

I have some questions to Otis.

1.  Haven't you memorized by now your private Snellen?

2.  Aren't you cheating when you continue to use the same familiar
private Snellen?

3.  Is self deception the purpose of your recommended method?

4.  Would you recommend the same methods for an un-natural eye?

5.  What about a non-fundamental eye, should the same Snellen be used?

6.  Isn't it true that the STATE of an unnatural or nonfundamental eye
is not dynamic?

7.  Would you recommend memory enhancing exercises to accelerate
myopia recovery?

8.  Why do the old guys continue attacking you as if you were the
biggest quack in the universe?  Haven't they heard about much more
powerful and dangerous quacks who defraud millions and extract
billions of $$$ from them, whereas you have hardly a handful of
followers?

9.  Why do you continue to post here and expose yourself to eternal
hate and ridicule?
Revival - 26 May 2007 20:31 GMT
--
I have some questions to Otis.

1.  Haven't you memorized by now your private Snellen?

2.  Aren't you cheating when you continue to use the same familiar
private Snellen?

3.  Is self deception the purpose of your recommended method?
--

What the hell are you talking about, Brainy?

The link to the IVAC Snellen chart is randomized, in case you failed to
realize.

Come now, Brainy - surely someone named 'Brainy' should show a little more
intellect?

No?

And even if the 'private snellen' that you're referring to WAS to always stay
the same, it frankly wouldn't matter.

For example, let's imagine (can you do that, Brainy?) that we have a hard
copy chart attached to our bedroom wall.

It's pretty familiar by now.

So would it be 'cheating' to measure my vision using the same snellen?

When you test yourself, *yes* you will already know which letters are where
and be able to 'speak' them.

But whether or not you can actually see the letter clearly is not dependent
on whether or not you've memorized the chart.

It's dependent on how solid and black the letters look, obviously.

Therefore, if I am able to call out the letter 'E!' but I can hardly see it,
then OF COURSE that measurement would be inaccurate.

And even if you had remembered perfectly exactly how the letter looked with
normal vision, and you 'imagined' you saw it perfectly, would that really be
imagining it?

The answer is: No.

What one remembers perfectly, he imagines perfectly, and sees perfectly.

Simple enough, right?

Think before you speak, mika.
Ms.Brainy - 26 May 2007 20:49 GMT
I am more than honored to be attacked (the second time, and still
counting) by this Revival new addition.  Just read his recent post
"Beuatiful Story" to get an idea of where s/he is coming from.

With opponents like this who needs supporters?

> --
> I have some questions to Otis.
[quoted text clipped - 52 lines]
> --
> Message posted via MedKB.comhttp://www.medkb.com/Uwe/Forums.aspx/vision/200705/1
Revival - 26 May 2007 20:09 GMT
--
> If you have some questions feel free to ask.

and you'll feel free to respond even though you don't know a damn
thing about what you write about.
--

And YOU are beginning to piss me off a little.

I mean - what the hell is this?

Rich asks for a Snellen chart, Otis kindly provides him with several helpful
links, and along comes a git like you pouncing on him like a retard.

If you 'aint got anything to productive to add to this discussion, then
please do try and keep your shitty comments to yourself, thanks.

You have a personal issue with Otis - you take it elsewhere.

This isn't your playground to bully others.

Infact, you know what, P Clar?

STFU.

Nice chattin'.
Neil Brooks - 26 May 2007 20:47 GMT
> --
>
[quoted text clipped - 5 lines]
>
> And YOU are beginning to piss me off a little.

Well ... that should incite a 180 degree turnabout, I should think.

> I mean - what the hell is this?

It's years of spew by Otis.  It's 12+ cases of induced diplopia THAT
WE KNOW OF.  It's insults, lies, falsehoods, deception, misleading use
of jargon, and absolutely no real dialog or conversation.  Otis likes
his soapbox, but can't/won't engage when asked relevant, logical,
direct questions.

It's years of people getting sick of the person whose boots you've,
inexplicably, chosen to lick.

> If you 'aint got anything to productive to add to this discussion, then
> please do try and keep your shitty comments to yourself, thanks.

And that's what we've been trying to tell Otis for more than half a
dozen years.  Beautiful summation.

> You have a personal issue with Otis - you take it elsewhere.

Have you noticed that--over the last six + years, HUNDREDS of people
have "had a personal issue with Otis?"  Notice the common element
(hint: it's Otis)?

> This isn't your playground to bully others.

But, magically, it IS yours to bully others, huh?  Just checking.

> Infact, you know what, P Clar?
>
> STFU.
>
> Nice chattin'.

I'm sure the Poet Laureate is coming your way.  Wait for it.
spammer - 27 May 2007 02:03 GMT
> --
>
[quoted text clipped - 26 lines]
> --
> Message posted via MedKB.comhttp://www.medkb.com/Uwe/Forums.aspx/vision/200705/1

Who anointed you "hall monitor"? People are free to post as they
please. YOU NO LIKE, YOU NO LOOK !!!!!
otisbrown@pa.net - 27 May 2007 01:41 GMT
Dear PClar,

Subject: I did my best to help Rich.

Rich asked for a simple Snellen eye chart that he could use.

I provided a Monitor Snellen, and a printable Snellen -- and
you go ballastic.

So rather that doing with Rich asked, you do not
help him -- you attack me for helping him.  You
should have helped him.

Otis

On May 25, 9:54 pm, p.clar...@gmail.com wrote:
> On May 25, 1:21 pm, "otisbr...@pa.net" <otisbr...@pa.net> wrote:
>
[quoted text clipped - 5 lines]
> no education in vision.  no clinical experience in vision.  but maybe
> you stayed at a Holiday Inn Express last night!
Dan Abel - 29 May 2007 02:06 GMT
> Read at 20 feet.

As usual, Otis answers the question without reading the whole post.


> If you have some questions feel free to ask.

But will you read the questions in full, or just spew out one of your
canned answers which don't apply and aren't correct?

> > to start experimenting to determine what reading correction I will
> > require, now that my eyes are (close to) 20/20 but I am dependent on
> > depth-of-field for intermediate and near vision.
Mike Tyner - 25 May 2007 19:04 GMT
> I'm recovering (nicely) from cataract surgery and IOL implant, and want to
> start experimenting to determine what reading correction I will require,
> now that my eyes are (close to) 20/20 but I am dependent on depth-of-field
> for intermediate and near vision.

It isn't the print that's important. It's the distance.

> (Yes, yes, I know that my ophthalmologist will do this for me when my eyes
> stabilize in a few weeks, but I'd like to experiment at home in the mean
> time!)

If you want precision, measure the distance from the bridge of your nose to
your reading material and tell him you want a prescription optimized for
that distance. If you need to see over a range of distances, split the
difference, or consider a progressive that covers the extremes, say 16" to
36".

-MT, OD
Dan Abel - 29 May 2007 02:19 GMT
> Can anybody direct me to a site from which I might print a Snellen Chart
> for reading distances?  Probably one in PDF format, so the size of the
> type is nicely preserved... but I would welcome whatever is available.

The Snellen chart and test are intended for distance vision.  Doctors
have something similar, though.

> I'm recovering (nicely) from cataract surgery and IOL implant, and want
> to start experimenting to determine what reading correction I will
[quoted text clipped - 4 lines]
> eyes stabilize in a few weeks, but I'd like to experiment at home in the
> mean time!)

I've had cataract surgery in both eyes, five years ago and ten years
ago.  You can do much better testing at home.  I use a +1.75 for
computer use and regular books, +2.25 for newspapers and paperback and
2.75 for the fine print on pill bottles and such.  Buy these at the
drugstore or supermarket for US$15, roughly.  You can try them on at the
store, both to see how they look on your face and to see how they work
for you.  If you play with these, you will be in a better position to
help your OMD find what is right for you.  As someone else mentioned,
measure the distance between you and the computer screen and between the
newspaper and yourself.  Give those numbers to your OMD before the exam
starts.  You may end up using something entirely different, but I think
it would be helpful to have some experience with close correction.  
YMMV, of course.

> BTW, I wrote a few weeks ago about my first surgery leaving me with a
> constricted pupil... that cleared up after a few days.  I seem to have a
> similar symptom in my second eye, but given the experience, I fully
> expect that to be fully functional again, soon.
>
> Rich
Rich - 29 May 2007 12:44 GMT
> I've had cataract surgery in both eyes, five years ago and ten years
> ago.  You can do much better testing at home.  I use a +1.75 for
[quoted text clipped - 4 lines]
> for you.  If you play with these, you will be in a better position to
> help your OMD find what is right for you.

Thank you Dan!  That is exactly what I am trying to do.

I've got a pair of +1.50 that I use for the computer, and a pair of
+2.00 that I am using for reading (from before my surgery), but I don't
think they are quite right...  as you say, testing at home, trying to
find the distances for reading that YOU use, under the lighting
conditions in YOUR home... that's a good test!

Your experience of +1.75; +2.25; and +2.75 is interesting.  I probably
would be reluctant to go so strong, but now I think I'll give them a try!

Thanks again!

Rich
 
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