Why, when you close your eyes and start rubbing them for a long time, does a strange effect appear, like a kaleidoscope?

Why, when you close your eyes and start rubbing them for a long time, does a strange effect appear, like a kaleidoscope?

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answers (2)

Answer 1
January, 2021

The pressure triggers the activation of retinal neurons, and a false signal goes to the optic nerves of the brain. But the brain understands this as a normal signal from the retinal receptors. It is felt most often as a diverging kaleidoscope or flashes, flickering and moving figures of bright color - this is how neuronal excitation spreads when pressed / strong friction.

Answer 2
January, 2021

I think because when you rub them you put pressure on all the cones responsible for vision, and because of this, the colleidoscope effect arises

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