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Author Topic: Do boss-eyed people see double vision?  (Read 37510 times)

Offline John Chapman

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Do boss-eyed people see double vision?
« on: 25/02/2009 00:13:06 »
Do boss-eyed people see double vision? By boss-eyed I meant an outward deviation of one eye to cause what is called an exotropic squint. Like Marty Feldman has:


 

How do these people perceive the world? Do they see two images superimposed on top of each other? Or split vision? Is one eye dominant so that one image disappears? Can they swap between seeing the image from one eye or the other? Can they see depth without binocular vision? How does this compare with the vision of animals that have their eyes set in either side of the head such as chameleons and many ground living birds?

I'm hoping that someone in Naked Scientist land either has this condition or knows someboy who does and can answer these questions
« Last Edit: 25/02/2009 00:14:57 by John Chapman »


 

Offline graham.d

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Do boss-eyed people see double vision?
« Reply #1 on: 25/02/2009 13:14:15 »
This is not uncommon in children. I believe it is important to have this corrected early because the brain effectively ignores one eye which can become a condition difficult to recover from if left too long. Certainly the human brain is not configured to interpret the images that would come from two "independent" eyes; this is not the case (presumably) with animals who have this as a deliberate feature. Most predators have binocular vision requiring two forward facing coordinated eyes.
 

Offline Chemistry4me

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Do boss-eyed people see double vision?
« Reply #2 on: 26/02/2009 07:57:31 »
This is not uncommon in children. I believe it is important to have this corrected early because the brain effectively ignores one eye which can become a condition difficult to recover from if left too long.
Before the age of 5 or 6 I believe...
After 6, it becomes permanent.
« Last Edit: 26/02/2009 08:01:48 by Chemistry4me »
 

Offline Chemistry4me

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Do boss-eyed people see double vision?
« Reply #3 on: 26/02/2009 08:00:36 »
Now strabismus is corrected very early in life, before age 4, when normal vision can still be restored.
 

Offline lancenti

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Do boss-eyed people see double vision?
« Reply #4 on: 26/02/2009 13:40:22 »
How do they correct it, though? Seems hard to teach coordination...
 

Offline dentstudent

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Do boss-eyed people see double vision?
« Reply #5 on: 26/02/2009 13:57:19 »
I have a "lazy" eye, in that my left eye wanders if I don't concentrate, or often when I shift from close to far focus. This is something that I have always had, and was due for operations etc when I was a child (though for some reason didn't - no idea why). I was given many exercises to correct this and to strengthen various muscles. I believe the operation would have been to shorten a muscle.

I can voluntarily move my eyes independently and be looking directly at someone even though it appears that I'm looking elsewhere (difficult to explain...). But, even though my eyes are looking at different fields, they are both in focus, but the overlaying image is at a 5 angle. When I do this, the vision is almost exactly the same as it is in a film when they portray the vision of someone who is drunk or has just been whacked on the head. Therefore, I don't do it too often!
 

Offline Chemistry4me

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Do boss-eyed people see double vision?
« Reply #6 on: 27/02/2009 03:50:21 »
 

Offline Chemistry4me

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Do boss-eyed people see double vision?
« Reply #7 on: 27/02/2009 03:51:45 »
Whoa! I feel dizzy just looking at that picture!
 

Offline Chemistry4me

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Do boss-eyed people see double vision?
« Reply #8 on: 27/02/2009 03:58:53 »
Are your eyeballs like any of these dentstudent?



http://www.cigna.com/healthinfo/zm6098.html
 

Offline RD

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Do boss-eyed people see double vision?
« Reply #9 on: 27/02/2009 04:13:01 »
But can you do this ...


« Last Edit: 27/02/2009 04:16:05 by RD »
 

Offline Chemistry4me

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Do boss-eyed people see double vision?
« Reply #10 on: 27/02/2009 04:14:14 »
How do they correct it, though? Seems hard to teach coordination...
Glasses, eye-patches, drug treatments, botulinum toxin, surgery and eye exercises used in addition to other treatments.
 

Offline Chemistry4me

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Do boss-eyed people see double vision?
« Reply #11 on: 27/02/2009 04:14:56 »
But can you do this ...




Whoa? How do you do that!
 

Offline RD

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Do boss-eyed people see double vision?
« Reply #12 on: 27/02/2009 04:24:01 »
« Last Edit: 27/02/2009 04:26:50 by RD »
 

Offline Chemistry4me

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Do boss-eyed people see double vision?
« Reply #13 on: 27/02/2009 04:28:01 »
Why can't I see the picture in my previous post? But I can see your two RD? ??????
 

Offline RD

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Do boss-eyed people see double vision?
« Reply #14 on: 27/02/2009 04:40:51 »
I corrected (deleted) the attachment 7215 which you have quoted.
 

Offline Chemistry4me

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Do boss-eyed people see double vision?
« Reply #15 on: 27/02/2009 04:47:17 »
Which means? ???
 

Offline RD

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Do boss-eyed people see double vision?
« Reply #16 on: 27/02/2009 05:00:26 »
You are quoting an attachment (#7215) which no longer exists (I deleted it), so no picture in the quote.


 

Offline Chemistry4me

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Do boss-eyed people see double vision?
« Reply #17 on: 27/02/2009 05:05:48 »
But why can I see your two attachments if you have deleted it?
 

Offline RD

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Do boss-eyed people see double vision?
« Reply #18 on: 27/02/2009 05:12:38 »
But why can I see your two attachments if you have deleted it?

Different attachment: #7219


« Last Edit: 27/02/2009 05:16:42 by RD »
 

Offline Chemistry4me

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Do boss-eyed people see double vision?
« Reply #19 on: 27/02/2009 05:16:35 »
Ah...so I can see #7217 and #7219 but not #7215 :)

So if I quote you again.....

But can you do this ...



 

Offline Chemistry4me

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Do boss-eyed people see double vision?
« Reply #20 on: 27/02/2009 05:17:54 »
I can see it again. :)
 

Offline dentstudent

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Do boss-eyed people see double vision?
« Reply #21 on: 27/02/2009 07:24:00 »
So - back on topic ;)

I guess it would be esotropia, and I can move each eyeball independently inwards, though much more easily with the left. Or, if you start with both eyes inwards, effectively looking at your nose, I can move each eye back to "normal" position independently.

Off topic:

I can also waggle my ears..... :D
« Last Edit: 27/02/2009 07:26:39 by dentstudent »
 


Offline Chemistry4me

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Do boss-eyed people see double vision?
« Reply #23 on: 27/02/2009 07:30:45 »
Waggle your ears? How do you do that? I can't even imagine trying to do it!
 

Offline dentstudent

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Do boss-eyed people see double vision?
« Reply #24 on: 27/02/2009 07:40:04 »
No, not really like that. That's a single blurry image, rather than 2 overlaid clear images.

How do I waggle my ears? By moving them, same as you would move your fingers. I just can!
 

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Do boss-eyed people see double vision?
« Reply #24 on: 27/02/2009 07:40:04 »

 

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