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PoetryandScience t1_jdchg1m wrote

You have a master eye. If you hold your thumb up at arms stretch, both eyes open , and line it up with a small object in the room; now close one eye. If you thumb is still in line then you have just closed the subordinate eye. Try it again, this time close the other eye and the thumb will appear to move.

Unless it is inconvenient (something in the way for example) , the brain utilises the master primarily and the other image is used to judge distance, it can be used to confirm detail at closer range (reading).

When I used to shoot pistols, I would have competitions with myself by using both a left hand and a right hand pistol; I would make a point of sighting the shot using my right eye to shoot with the right hand and the left eye to shoot with the left. You might find you can consciously choose which eye is acting as the master; ambidextrous people (me) find this easier than most, or so I understand; we use both sides of our brain more readily. There is a saying , "ambidextrous is using both hands equally badly"; luckily, nobody told Leonardo da Vinci or Michelangelo.

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teteban79 t1_jdd0cgx wrote

Is it weird if my dominant eye and dominant hand are not on the same side?

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CrateDane t1_jde4cqp wrote

No, it's just a little less common than having same side dominance for eye and hand.

https://pubmed.ncbi.nlm.nih.gov/15513026/

>in a population with 9.25% left-handedness and 36.53% left-eyedness, 34.43% of right-handers and 57.14% of left-handers are left-eyed.

So 5.29% are left eye + left hand dominant and 59.50% are right eye + right eye dominant, meaning there's concordance in 64.79% of people. The remaining 35.21% have different dominant sides for eye and hand (31.25% left eye + right hand, 3.96% right eye + left hand).

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Eternal_Revolution t1_jdeunqg wrote

It can also change.

I was right-eye dominant, but developed a cataract in my right eye and even after getting an IOL I am left-eye dominant now.

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junegoesaround5689 t1_jde2f78 wrote

Hmmmm, never heard of or tried this before.

Didn’t work for me.

If I put my thumb up in front of the object and try to focus both eyes on the object, I see two thumbs, if I focus on my thumb there are two objects about equidistant on each side of my thumb. My thumb moves when I close either eye, although slightly less with the right eye.

I am partially ambidextrose - slight right hand dominance but use both hands for similar tasks and can easily "train" the left hand to be about as effective as the right on anything, like writing, where I’ve developed a more pronounced right-handed preference.

Maybe it’s because I’m moderately near sighted? 😋

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Eternal_Revolution t1_jdeufyz wrote

another version is make a triangle with your fingers. With both eyes open, line up on a distant object.

Without moving, close one eye and then the other.

Your dominant eye will still have the object centered. Your subordinate eye will cause the "window" of your fingers to move.

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ffenliv t1_jdm8jgg wrote

I learned of this recently and have tried dozens of times in different locations. No matter which I eye close and which method I use, the thing I'm looking at appears to move. I always assumed this was true for everyone, not having heard of dominant eyes before a few weeks ago.

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CrateDane t1_jde4sm4 wrote

> You might find you can consciously choose which eye is acting as the master; ambidextrous people (me) find this easier than most, or so I understand; we use both sides of our brain more readily.

Well, it's different with vision. Both eyes use both sides of the brain. More specifically, each side of the brain is responsible for one side of the visual field in each eye.

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