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Dominant eye
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Astrid via MedKB.com
medicine forum beginner


Joined: 01 May 2006
Posts: 12

PostPosted: Sun Jul 16, 2006 9:53 am    Post subject: Dominant eye Reply with quote

I have -2.75 right eye and -2.25 left. If my left is dominant does that mean,
without glasses, that my vision is better than if the right is dominant? Iím
not sure which is the dominant one. If I line two things up itís the left,
but I read that people select the dominant eye for things like shooting or
viewing down a telescope, in which case mine must be the right. #When I take
a photo it's the right one I use.

Does the difference between my eyes have any impact on my binocular vision, I
mean do the eyes still work properly together, if I donít wear glasses?

--
Message posted via http://www.medkb.com
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JohnDoe
medicine forum Guru


Joined: 14 Jun 2005
Posts: 364

PostPosted: Sun Jul 16, 2006 10:58 am    Post subject: Re: Dominant eye Reply with quote

ChingoBelle via MedKB.com wrote:
Quote:
I have -2.75 right eye and -2.25 left. If my left is dominant does that mean,
without glasses, that my vision is better than if the right is dominant? Iím
not sure which is the dominant one. If I line two things up itís the left,
but I read that people select the dominant eye for things like shooting or
viewing down a telescope, in which case mine must be the right. #When I take
a photo it's the right one I use.


The dominant eye is not always the clearest eye.

Make a pretend pistol by holding your two hands together with arms out
straight in front of you. Line up the tip of the 'pistol' with a distant
object, with both eyes open. The eye that is still lined up with the
distant object when you close the other one is your dominant eye.

Using a real object may introduce bias, e.g. if you're right handed you
may prefer to hold a rifle or telescope on your right side.

Quote:
Does the difference between my eyes have any impact on my binocular vision, I
mean do the eyes still work properly together, if I donít wear glasses?


Yep the binocular vision should be fine, although of course blurry
without glasses.

Dom
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callimico66@yahoo.com
medicine forum beginner


Joined: 11 Jun 2006
Posts: 3

PostPosted: Sun Jul 16, 2006 3:14 pm    Post subject: Re: Dominant eye Reply with quote

I discovered that my "dominant eye" is the opposite from my "brain
dominant" side, AND, the dominance switches back and forth, depending
on which hand I am using. For example, if I "sight" something using my
right hand (I'm right-handed)-then my left eye is dominant. If I use my
left hand, my right eye is dominant. Most of the time my left eye
"rules," but for about 7 years, I have chosen to have my Rx
undercorrect my left eye--this has worked out great. Previously, my
left eye used to "take over," and my right eye struggle to go
along--got eyeaches, headaches and and fatigue.

My dominant eye, without glasses, "sees better," but I have more
astigmatism in it. Undercorrecting my Rx in that side improves my
binocular vision--but then, it was pretty good without that adjustment.
My natural difference between eyes is about like yours--a -.50 D.

C66
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Dr Judy
medicine forum Guru


Joined: 07 May 2005
Posts: 304

PostPosted: Sun Jul 16, 2006 3:57 pm    Post subject: Re: Dominant eye Reply with quote

ChingoBelle via MedKB.com wrote:
Quote:
I have -2.75 right eye and -2.25 left. If my left is dominant does that mean,
without glasses, that my vision is better than if the right is dominant?

No. Dominance has nothing to do with refractive error or uncorrected
acuity. Dominance refers to the preferred eye is situations where one
eye must be selected over the other.

Quote:
I'm not sure which is the dominant one. If I line two things up it's the left,
but I read that people select the dominant eye for things like shooting or
viewing down a telescope, in which case mine must be the right. #When I take
a photo it's the right one I use.

There are about 15 different ways to measure dominance and not the same
eye will always be selected. For example, you may prefer your right
eye when aiming a gun but prefer your left eye when faced with a
retinal rivalry choice.

Quote:
Does the difference between my eyes have any impact on my binocular vision, I
mean do the eyes still work properly together, if I don't wear glasses?

For a small difference like yours, the difference will not affect
binocular vision. However, the large amount of blur present when
viewing distance objects without glasses will interfere with your
ability to judge distances and you will lose much of your subjective
awareness of stereopis.

Dr Judy
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Mike Tyner
medicine forum Guru


Joined: 24 Mar 2005
Posts: 1299

PostPosted: Sun Jul 16, 2006 5:38 pm    Post subject: Re: Dominant eye Reply with quote

<callimico66@yahoo.com> wrote

Neurologically, the "dominant eye" and the "dominant hand" are very
different.

Handedness is hardwired and the wiring is crisscrossed and overlapped in the
eyes so that if your left brain is dominant, the right field in BOTH eyes is
your "dominant hemifield." The left field in each eye connects to the right
brain. When language is left-dominant, as it usually is, those people
perceive words better in their right field than in their left, perhaps one
reason *most* languages read left-to-right.

So the "dominant eye" is more of a learned preference and we tend to choose
the "better" eye.

As a result, eye dominance is more random than handedness, where a big
majority are right-handed and only a few have uncertain dominance.

By contrast, eye dominance categorizes more equally than handedness, and
there's a larger group with uncertain results.

-MT
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acemanvx@yahoo.com
medicine forum Guru


Joined: 15 Nov 2005
Posts: 732

PostPosted: Mon Jul 17, 2006 3:43 am    Post subject: Re: Dominant eye Reply with quote

my left eye is dormant even though its more myopic but thats probably
because it corrects better with glasses and has less cylindar. You are
lucky you are a low myope less than -3, must be easy being much less
dependant on glasses than my moderate-high myopia of -4.5 Sad
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Rev Jessie James
medicine forum beginner


Joined: 18 Apr 2006
Posts: 25

PostPosted: Mon Jul 17, 2006 4:36 am    Post subject: Re: Dominant eye Reply with quote

Quote:

Handedness is hardwired

Can you expand on this? Cross lateral motor skills is definately a trait
that can be learned. Many left handed people at birth, become right handed
through their school age years. I was one of them. To this day, I can
write, throw, hit, golf, use a mouse, bowl, play tennis, shoot pool, shoot
baskets equaly well with either hand. Many top atheletes are top atheletes
because of their ability to use both sides of the body equally.

Maria Sharapova is a prime example of a 'born lefty" that has become a world
class tennis player using her right hand.
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Quick
medicine forum Guru


Joined: 19 Jun 2005
Posts: 343

PostPosted: Mon Jul 17, 2006 6:23 am    Post subject: Re: Dominant eye Reply with quote

Rev Jessie James wrote:
Quote:
Handedness is hardwired

Can you expand on this? Cross lateral motor skills is
definately a trait that can be learned. Many left handed
people at birth, become right handed through their school
age years. I was one of them. To this day, I can
write, throw, hit, golf, use a mouse, bowl, play tennis,
shoot pool, shoot baskets equaly well with either hand.
Many top atheletes are top atheletes because of their
ability to use both sides of the body equally.

Maria Sharapova is a prime example of a 'born lefty" that
has become a world class tennis player using her right
hand.

Try this. Have someone stand behind you and then give
you a gentle shove enough for you to have to take a step.
I think it will be your right foot.

-Quick
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Mike Tyner
medicine forum Guru


Joined: 24 Mar 2005
Posts: 1299

PostPosted: Mon Jul 17, 2006 10:30 am    Post subject: Re: Dominant eye Reply with quote

"Rev Jessie James" <Jessie@yahoo.com> wrote

Quote:
Handedness is hardwired

Can you expand on this? Cross lateral motor skills is definately a trait
that can be learned.

Yes, but neurons controlling the right side of the body connect to the left
brain, no matter what.

Neurons from the right eye split off at the optic chiasm and go to both
sides of the brain.

Quote:
Many left handed people at birth, become right handed
through their school age years. I was one of them.

But your right hand is still connected entirely to your left brain.

-MT
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