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Ok, I know I'm left-eyed. I look through telescopes and camera viewfinders with my left eye, contrary to the design of most cameras that seem intended to be held off to the right side of the head. It's just easier for my brain to ignore the signal from the right eye than from the left. Also easier to close only my right eye than only my left, but that's probably a result of the mental preference... those muscles get used more.

But am I left-eared too? Lately I've felt like I hear everything relative to my left ear. I worried that it might actually be hearing loss in my right ear, but when I make sounds in one ear at time, they seem the same. I can still hear the squeal of a TV's picture tube with either ear, and those high frequencies would be the first to go if I was experiencing hearing loss. So I don't think it's that. But it just seems like my brain has chosen to pay more attention to the left ear when it has signals from both available to it. Yet I have no problem locating sounds. And stereo effects in headphones work fine.

The brain is a weird thing.

If it IS hearing loss, I can probably blame that civil war reenactment. :-P I'm not a concert-goer or anything. I wonder if there have been any studies on the effect of constant low-decibel noise (such as computer fans and hard drives) on the ear over extended periods of time (like 5 years). Sitting near computers as a lifestyle is going to prove to be unhealthy in SOME way, I'm sure. :) And I don't mean in terms of lack of exercise or carpal tunnel or sore behinds.

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science facts from Cerebral Hemispheres class.....

That is very interesting... it makes sense in fact. Did you know that most people are left eared? Hearing, like most other senses, is crossed so that what the right ear hears is processed by the left hemisphere and what the left ear hears is processed by the right hemisphere. Although the left hemisphere is, in a huge majority of people, the hemisphere where language is processed, it is the the RIGHT hemisphere that remembers the phonology, and, thus, the LEFT ear would be dominant. Cool, huh?

Re: science facts from Cerebral Hemispheres class.....

Neat! :)

So, could my being left-eyed be explained in the same way? As far as I know, most people are right-eyed. Or at least, the people who are responsible for designing viewfinders are. :) Maybe the fact that both my left ear AND left eye are dominant indicates a rare wiring of my brain...? It wouldn't surprise me at all to be told my hemispheres are off-balance. :)

Re: science facts from Cerebral Hemispheres class.....

vision is weird. It's not split up left eye/right eye. It's split up left side of the visual field, right side of the visual field. So you are processing one side of a 3D image in each hemisphere rather than the two components of it, if that makes sense. So being Left or Right eyed doesn't really mean too much from a hemispheric standpoint. Having a dominant L or R visual field, however, does.

Re: science facts from Cerebral Hemispheres class.....

Wow.... how very cool! :)


Hey Dan-o,
Just thought you might be curious to know that I am left eye dominant also....in case you wanted to do a family/inheritance type thing. Its actually something we consider quite seriously at work. Especially for people who want LASIK....we have to know which is the dominant eye....interestingly, since (as you noted) everything seems to be built for OD (that means right eye) dominant people, the way that we test people is kind of dumb. we are told to just give them a camera and see what eye they put it up to...but since people recognize that most cameras are geared for OD peeps, they put it up to that eye even if they are OS (left eye) dominant just because it "feels" better. a better test for dominance is to use both hands and make a triangle with the thumb and index finger of both and put some distant object in the center of that triangle with both eyes open. now close one eye then the other without moving you hands...you will see that only one eye is actually centering that object....that, oddly enough, would be the dominant eye. And (you probably don't care, but now that I am rambling I will continue), interestingly enough....you might find it interesting that at all levels of baseball except the majors, the proportion of crossed-dominance (OD dominant/left handed & vice versa) and non-crossed dominant players is about even. When you get to the major leagues, something like 70-80% of players are actually cross-dominant. That's because when a batter is at the plate, the eye closest to the pitcher actually does most of the work when picking up the pitch and recognizing the spin and all that. If that eye is your dominant eye, it makes sense that it would perform this task more efficiently. So your right handed hitters might be slightly at an advantage if they are OS dominant and vice versa. And then switch hitters are usually better from one side of the plate than the other....etc. I could go on and on.....but in the interest of not putting you to sleep earlier than need be....i will stop now. catch ya later


Actually it's quite interesting stuff. You could've kept going! :)

I tried that triangle thing... I'm not sure I was doing it right, but my arms were more inclined to center the triangle with my nose than with the dominant eye, so it ended up being exactly centered, with the distant object chopped off evenly by both eyes.

I would think a better test would be not to give the patient a camera, but a telescope. Or simply one of those keychain photo tube things.

I never thought about it before, but I guess batting lefty is harder for me not just because of motor dominance, but also because my right eye doesn't follow the ball as well as the left. I recall the problem being not just swinging the bat where I want to, but figuring out where to swing it.

But when batting right-handed, with the combination of my left eye to the pitcher and the right hand controlling the bat, I've been caught pulling off one-handed hits á la Crash Davis at the batting cages. :)

And, yeah, that should've been à la, not á la. :)

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