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Interesting: your visual cortex gets switched off every time you move your eyes
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[quote:Dimethyltryptamine:MV8zODk4NTQyXzcwMjYwMTMyXzg4NkZCOTAx] [quote:Dr. Moran:MV8zODk4NTQyXzcwMjU2MjMwXzZFQzQzNzg=] What's even more interesting is that your eyes never really stop moving. It means that a non-negligible fraction of what we perceive as reality is, in fact, made up (i.e. interpolated) by the brain. [/quote] ALL of what you perceive is "made up" in the brain. You don't see the world; you "see" a simulation of the world generated within your visual cortex. You're "seeing" neural signals inside your brain, not light itself. What is the difference between brain circuits making you see something due to eye signals, or due to internal generation of the image? Both processes do the exact same thing in the brain. If your brain was wired to a sufficiently complex computer, it could make you perceive anything at all, perfectly realistically, even though it was all "made up". [/quote]
Original Message
Another thread made me read more about saccadic masking.
Every time you move your eyes (and they are moving all the time), your brain switches off the processing of retinal images. When the movement stops, the processing starts again. During that time you're effectively blind. It's called saccadic masking.
If this didn't happen, you'd see blurred images every time your eyes move.
Our field of vision seems to be continuous due to a phenomenom known as transsaccadic memory. The brain takes in the image obtained just before the saccadic mask sets in, and the image it gets when the mask is lifted. It then integrates these two images to fill in the gap.
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