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Home > Archive > Vision > November 2004 > [Possibly OT] Stereograms: I view them inside-out!!!
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[Possibly OT] Stereograms: I view them inside-out!!!
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| Neclepsio 2004-11-07, 11:09 am |
| Hi everyone.
I choose this newsgroup for this message because I found here some
informations about stereograms in Google: excuse me if I am offtopic.
My problem is that I can see stereograms, but the part that should be
outwards is inwards and the part inwards is outwards: if something
"exits" from the paper, I see it "entering".
To solve my problem I have to generate the SID using the negative of the
map I should use.
Can you help me?
Thank you,
Ignazio
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| Mike Tyner 2004-11-07, 11:09 am |
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"Neclepsio" <neclepsio@hotmail.com> wrote
> I choose this newsgroup for this message because I found here some
> informations about stereograms in Google: excuse me if I am offtopic.
> My problem is that I can see stereograms, but the part that should be
> outwards is inwards and the part inwards is outwards: if something "exits"
> from the paper, I see it "entering".
> To solve my problem I have to generate the SID using the negative of the
> map I should use.
> Can you help me?
There are several methods of presenting and viewing stereograms. Depending
on the method, you could:
-Turn the work upside down.
-Turn the polarized or red-green glasses upside down.
-Learn to view stereograms with convergent diplopia, rather than divergent,
or vice versa.
-MT
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| Neclepsio 2004-11-07, 7:11 pm |
| Mike Tyner wrote:
> "Neclepsio" <neclepsio@hotmail.com> wrote
>
>
>
>
> There are several methods of presenting and viewing stereograms. Depending
> on the method, you could:
>
> -Turn the work upside down.
Doesn't work.
> -Turn the polarized or red-green glasses upside down.
I don't use glasses.
> -Learn to view stereograms with convergent diplopia, rather than divergent,
> or vice versa.
I'm trying... I'll make you know...
Thank you.
Ignazio
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| Mike Tyner 2004-11-07, 7:11 pm |
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"Neclepsio" <neclepsio@hotmail.com> wrote
>
> I'm trying... I'll make you know...
So we're still left to guess which type of stereogram you're using. If you
"don't use glasses" then you're probably working with side-by-side images
that most people view by converging (crossing) their eyes until they see
three images.
If so, it's evidently difficult for you to converge, and easier to diverge.
In that case it would be helpful to use a small ophthalmic prism to assist
you in creating convergent diplopia. An eye doctor should have an assortment
of these and be able to help you choose the prism value that works best,
something like 6-12 prism diopters. You can find a suitable hand-held prism
cheap, from a supply house such as Edmund Scientific, or have glasses made
with prism ground into them.
-MT
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| Dr Judy 2004-11-07, 10:08 pm |
| "Neclepsio" <neclepsio@hotmail.com> wrote in message
news:2v6v8rF2h8sriU2@uni-berlin.de...
> Hi everyone.
> I choose this newsgroup for this message because I found here some
> informations about stereograms in Google: excuse me if I am offtopic.
> My problem is that I can see stereograms, but the part that should be
> outwards is inwards and the part inwards is outwards: if something "exits"
> from the paper, I see it "entering".
> To solve my problem I have to generate the SID using the negative of the
> map I should use.
Are you looking at the "magic pictures" type printed stereograms for fun or
are you using stereograms as part of a vision therapy program.
If the former, you need to learn to "see" the picture by diverging, not
converging your eyes. Do this by staring at a distance object, then
introducing the stereogram without changing eye positon. Some stereograms
have printed instructions with them and small dots that can be lined up.
This isn't really a problem; there are two ways to produce the effect and
you are using the other one.
If you are using stereograms for vision therapy, consult your therapist for
assistance. Doing it wrong will not bring about the improvement in eye
muscle balance you are seeking.
Dr Judy
> Can you help me?
>
> Thank you,
> Ignazio
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