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[deleted] t1_iwu7ftp wrote

[removed]

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Nine-Eyes t1_iwu8xlf wrote

Yeah, that's a human brain evolved to use parallax for depth perception, but how does a chameleon's visual cortex work differently with those independently-operated eyeballs?

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Iron_Rod_Stewart t1_iwufuok wrote

We don't know what a chameleons inner life is like, but imagine you're in a dark cave and are feeling both sides of it with your hands. They move independently but you're still able to form a pretty good idea of what the space around you is shaped like.

People think of binocular vision as a series of static images we have to integrate before using them, but it's really more of a stream of information we can use on-the-fly as in the cave example.

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Apokolypze t1_iwud2f6 wrote

This works with both eyeballs pointed in generally the same direction, but a chameleon is capable of pointing it's eyes in completely separate directions and controlling both individually. This isn't really a comparable scenario, right?

The question is whether we know how a chameleon "sees", not how humans see.

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Jewrisprudent t1_iwv5tqj wrote

And the point is that the image you see after the paper is placed there is an image constructed by two images that no longer have any overlap. What you “see” as far as your brain concerned is not so much an image, but a construct of where you are in the world around you. A chameleon is just able to gather information about is surroundings from a functionally wider area, and then their brain process that and they form an understanding of where they are and what’s around them.

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HDH2506 t1_iwun262 wrote

Would VR be valid enough for you? One eye sees Moskva and one eye sees London

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Orisitabagel t1_iwupc9u wrote

Fun fact. If your eyes don't work together you see like this all the time because your brain ignores one eye constantly. So you see two different images with both eyes.

Source: my own personal experience cause for some reason or another my brain never developed the ability to see with both eyes at once and reform the separate images into one. So it decided to constantly ignore one eye. It's like being blind in one eye all the time. But I can still see out of both. I can "switch" to seeing out of one eye or the other. Weird.

So I'm a chameleon?

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Corrupted_G_nome t1_iwvigdt wrote

Humans actually have dominant eyes like dominant hands. Its hard to notice unless there is a case like yours. People who have different prescriptions per eye with glasses have two different images depending which eye is dominant in that moment. Closing one eye over the other I have different levels of clarity/blurryness but when both are open the default is my dominant eye's prescription.

To test a peson can hold their arm out stright forward then close one eye or the other. One eye when closed will cause the image to shift and the other eye when switched will show your arm where it is when both eyes are open.

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Orisitabagel t1_iwvjjnm wrote

Ah that is cool! I never knew about dominant eyes. What you described is my case exactly. Different prescriptions for each lens in my glasses, and the image shifts a bit to the left or right when I change which eye is covered. I usually default to my left eye even though it is apparently the weaker one.

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AllAboutTheData t1_iwv6691 wrote

Another experiment would be to hold a mirror up to each of your eyes. Angle them off to the side so that each eye sees a completely different field. It could be done with a reflective surface, such as a sleeping cell phone, held up to one eye and one hand placed as you described.

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