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  1. #11
    keithwms's Avatar
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    Offhand I wouldn't think that there is a left/right-eyedness that is at the same level as left-right-handedness. The hands are designed to work separately, but the eyes almost always work together e.g., for some portion of depth perception and focus and such. I recall that for the pupil reflex, both eyes are normally synched, and this is a standard test to check for normal brain activity. So I guess that's an indication that the brain is fundamentally wired to interpret the optical signals in a binocular way.

    Moreover, I don't know if the visual cortex is truly divided between the left and right hemispheres as much as many other faculties; I seem to recall that vision itself is well centered even if perception and analysis are not, so that might also be relevant.

    Now, as for how you interpret or analyze things, sure, that could be 'handed.' People do interpret scenes in different ways, e.g. creatively or analytically or both. I recall this visual test which is supposed to determine whether you are left or right brained:



    In case you didn't notice it, there is a man's face among the coffee beans, and the speed with which people would recognize that is supposedly related to creative/analytical abilities. I thought this was nonsense when I read about it but then I did it and actually saw the face immediately, whereas some friends didn't even after 10 seconds. And I am indeed very analytical. So who knows....

    Anyway, I don't think that creative/analytical ability overtly manifests itself in left or right-eyedness: tests such as the one above probably yield the same results regardles of which eye you use to do them. Unless of course there is a physical difference between the eyes, i.e. impairment on one side!

    I think the difference between colour and b&w vision is very interesting; I am quite convinced that we have different ways of perceiving/interpreting colour or b&w scenes, and that is of course wrapped up in the way the rods and cones work.
    Last edited by keithwms; 11-11-2006 at 02:49 PM. Click to view previous post history.

  2. #12

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    "Offhand I wouldn't think that there is a left/right-eyedness that is at the same level as left-right-handedness."

    But in fact there is. I can't use a camera at all with my right eye and when I look down I only see the left side of my nose (incidentally, I am right handed). I am not blind in my right eye. If I cover the left I still see fine, but the left eye is dominant.

    By the way, I only see coffee beans in your test, but then those ink blot tests always look like ink blots to me. I suppose I must be totally unimaginative, which is probably how I managed to get all those books published :-)

  3. #13
    keithwms's Avatar
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    Quote Originally Posted by Woolliscroft View Post
    "Offhand I wouldn't think that there is a left/right-eyedness that is at the same level as left-right-handedness."

    But in fact there is. I can't use a camera at all with my right eye and when I look down I only see the left side of my nose (incidentally, I am right handed). I am not blind in my right eye. If I cover the left I still see fine, but the left eye is dominant.

    By the way, I only see coffee beans in your test, but then those ink blot tests always look like ink blots to me. I suppose I must be totally unimaginative, which is probably how I managed to get all those books published :-)
    If you look down and only see the left side of your nose then maybe that has more to do with facial asymmetry Seriously though, our faces are surprisingly asymmetric, maybe it is related to that.

    I certainly don't have a left / right preference, but on the other hand I am perhaps an oddball, I had no decisive left/right handedness until someone finally made me choose as a practical matter, and then after that I still remained mostly ambidextrous, which comes in pretty handy (pun intended). I also can read and write 'mirrored' at a normal speed, so I guess all of us are wired a bit differently!

    About the beans, look around the bottom left, around 7 o'clock. It's a little face, only about the size of one of the beans. This coffee image is a bit odd, I see the face and I also see three sets of almost idential bean configurations along the diagonal. Hmm maybe I should be a professional bean counter.

  4. #14
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    I can't tell if I succeed or fail. I saw several faces in bits and pieces. One even side-lit.

    One I saw these little african-esque masks in the beans, I couldn't see anything else.

    Back to the left-eye topic, for myself the experience of forced left-eye use meant (a) greater deliberation betcause I was not habituated to rapidly seeing "good" pictures through that channel, and (b) different sorts of awareness of depth, lack of depth, and I actually think there's a tiny tiny difference in perceived contrast between my two eyes (no idea about the source of it).

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