An absolute legend! Thanks for all the help Dr Lee, these videos are golden
@gblargg3 ай бұрын
It's NOT inverted within the context of your head. There are no tiny gravity sensors in your retina denoting what is up and down. There is no up and down. It's just this mostly dark, mush place where an image is projected. It's only when we, from the outside of a person, ask what it would look like if we could see inside and what's projected. But it's because we are inverted with respect to the image, not the other way around. The neurons are wired to where each part of the image falls. Things that are above you cast light in a particular part of the retina, so that's where they get wired. The ground casts light in other parts of the retina, so that's where neurons for things being down. It's not like your brain has a retina pre-wired where the part near the top of your head is wired to be up, and part near the bottom of your head is wired to be down, and then it gets an image with things the opposite way.
@cyrrender2 ай бұрын
sources please? would like to look further into this
@gblargg2 ай бұрын
@@cyrrender It's a conceptual thing, stemming perhaps from the idea that there is a little person inside your head viewing things, and seeing the image upside-down. "Why would the brain flip the images perceived by your eyes?" discussion has some good answers.
@gblargg2 ай бұрын
@@cyrrender I found an interesting article, Illusions "Right-Side Up" that talks about perception of various things, and how some are tied to our sense of which way is up, and others aren't.
@jslsa645 ай бұрын
Thank you Dr Lee!
@noahpage74595 ай бұрын
Really cool demonstration
@hectorportillo1906 Жыл бұрын
Excellent video! Thanks!
@lordad87211 ай бұрын
To be honesty I wanna try to do that prison glasses experiment
@hgracern3 ай бұрын
Wow, thanks. Then the cortex adds Color to the inverted image. 🎉
@debigdogk95632 жыл бұрын
Wonders of the eye 😀😀😀🙏🙏🙏 Thank you 🙏
@khaledgowaily68182 жыл бұрын
Thank you Dr Lee. I just wonder if in uncorrected hyperopes, the image is not inverted (because the focus is behind the retina).
@d3ci.b3L2 ай бұрын
My brain can't comprehend something. And maybe I'm not comprehending this correctly. But if the world is inverted upside down in the retina, then shouldn't up/down be opposite to where my eyes look? If my eye looks up, is not my retina seeing the bottom of the scene?
@tomtroler8 ай бұрын
1:09 that one got me up from the sleep
@munazzasikandarsikandarkha756610 ай бұрын
Amazing!
@gaylecheung3087 Жыл бұрын
Don’t ever remember having prison glasses because I was either too young or I totally locked it out of my conscious but I do remember to have a great kindergarten and up to great H3 I can remember I’m so used to go to see eye doctors on my life
@lisanasanguino8794 Жыл бұрын
Ohh thanks
@def64202 ай бұрын
but why does brain turn the image?
@abhigyanganguly1988 Жыл бұрын
I'm very interested about this phenomenon. Could someone explain exactly how does the brain invert this image? Is it like applying the rotation matrix used in computer vision ? Or is it some other mechanism?
@gblargg3 ай бұрын
There is no inversion. Each neuron is connected to the appropriate part of the retina. Same for a camera sensor. There is no inversion. They're just wired so that the upper-left pixel corresponds to the proper image detecting element that corresponds to the things outside the camera on the upper-left side. The inversion is a characteristic of describing the setup from the perspective of someone outside the head/camera. Within the confines of the head/camera, there is no inversion (because there is nothing else to refer to, just the image inside it).
@abhigyanganguly19883 ай бұрын
That's what I too thought at first, but there's a famous neuroscience experiment using inverted prism glasses. Wearing these glasses, the subject sees everything upside down, as he should. But after a period of time, (1-2 days), the brain turns everything back to normal. The glasses have no effect. It's called neural plasticity. So it's definitely more that an inverted connection
@arh7897 Жыл бұрын
And you never really touched anything your whole life atom's