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Thread: Vision and consciousness.

  1. #1 Vision and consciousness. 
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    Hey guys.


    I just want some input on a subject that's been bothering me lately.

    Ok, it's not a secret how vision works. Eyes receive photons which are converted to electrical signals, which in turn are sent to the brain. So the actual photons never reach brain, in fact if you are lucky your brain would never see the light of the day

    If so, then how do I SEE the picture I see? How could we see this picture inside our brain based only on electrons, without the presence of photons and in total true darkness? Doesn't it require photons to create a picture we see? But brain does not re-emit actual photons for our consciousness to receive, does it?

    Are there any theories for that. I tried google, but it's all about how vision works (eye-brain). This then is more brain-consciousness problem. Probably need some other more precise keywords.

    Dunno if this suits more in philosophy or psychology.


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    Brassica oleracea Strange's Avatar
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    The visual centers of the brain process the information generated by the retina and extract information from it. It is all "processing" at that point. This might be a good starting point: Visual cortex - Wikipedia, the free encyclopedia


    If you want to understand how that relates to "consciousness" (whatever that means) then that is a much bigger problem. And is more philosophy than anything else, I suspect: Qualia - Wikipedia, the free encyclopedia


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  4. #3  
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    First one I read (I would probably need to read it 100 more times to understand).
    Second one I'll read later, but it looks great - never heard that word before - qualia.

    I really cannot grasp how only electrical signals could form a picture everyone sees in their head.
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    Brassica oleracea Strange's Avatar
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    The interesting things is that almost exactly the same brain functions are involved in seeing something with your eyes and seeing something with your "mind's eye", i.e. imagining seeing it. So the eyes are almost incidental!

    In fact, the image formed on the retina is very poor compared with what we actually "see" - it is low quality, only a tiny part is in focus, colour resolution varies, it has big "holes", and our eyes are constantly jumping around. Most of what you think you see is created by the brain.
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