Please read my post before commenting.
I’ve heard the elbow thing and the “what do you see behind you” thing a hundred times.
My thought process is that the optic nerve is essentially an HDMI cable. Whether it is connected to a computer that is turned off (a closed eye, if you will) or just completely disconnected (suppose you are missing an eye or something), the signal it sends to the monitor is the same: nothing.
The “monitor”, the visual cortex, as far as I understand, just constantly processes what the optic nerve sends. So if blind people don’t lack a visual cortex, and the signal that cortex receives from the optic nerve is identical to that of a regular person seeing zero light (assume closing your eyes means 0 light, disregarding light seeping through eyelids and whatnot), how can you say that blind people see nothing while we see black?
In: Biology
Because our brains are *really* good at cutting down on redundant processing.
If you hear a constant pitch, your ear will eventually tune it out. If all you see is “black” then your brain goes, “well we only get this one signal from eyes and we know there’s nothing there so we can just ignore that and process something else”.
You can reprogram your own eyes if you want. There are glasses that flip your entire field of view upside down. Wear them for a week, and your brain “rights” the field of view such that if you **don’t** wear the glasses you see things upside down for a further week.
According to my one eyed buddy, same thing. Took him about a week to stop seeing a black spot and now he just has a blind spot.
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