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Does any image form in our retina when we visualize with our eyes closed?

Does any image form in our retina when we visualize with our eyes closed?

Postby cartwright » Sat Oct 15, 2011 6:02 am

I am curious to know that what actually happens in our retina when we imagine/visualize something/someone? Like, when I close my eyes, I could clearly see the image of my laptop. My question is, Where is this image actually forming? Because it is also a kind of an image only. In which part of our body is this image forming?
cartwright
 
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Does any image form in our retina when we visualize with our eyes closed?

Postby denton » Sat Oct 15, 2011 6:08 am

No, no image forms on the retina eyes closed or open. Retina is only a receptor, the image we see forms in the brain(in the visual cortex). So when you visualize you're seeing a memory from the association cortex that works with the visual cortex. Also why people can have hallucinations, seein stuff that their retina isn't actually sending in. Or when you have a dream, you can see but your ees are closed.
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Does any image form in our retina when we visualize with our eyes closed?

Postby bentlie » Sat Oct 15, 2011 6:10 am

It's a residue from what you were looking at. You can get a simmilar effect, say by staring at a blue square for a minute, then looking at a white sheet of paper. The after image that you'll see, but isn't physically there, is a yellow square.
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