Vision science: blindness and no visual input

追加: 2026-05-16

[00:00:00]If we remove both the eyes of a person, people usually think he will only see darkness. But this is actually wrong. If someone doesn't have eyes, what would he see? You need eyes to see anything, even [music] darkness. Blind people who have no eyes don't see darkness. They see nothing. And nothing doesn't mean black.

[00:00:18]Nothing means no visual experience at all. Here's where it gets interesting.

[00:00:23]Sometimes the brain can't handle the complete lack of input. So, it creates an illusion. This illusion feels like a black color, but it's not really black or even a color. It's something your brain invents to fill the empty space.

[00:00:35]The question is, what should we call this color that isn't actually a color?

[00:00:39]Tell me in the comments what name you'd give. And if you're into science and explanations like this, hit that subscribe button for more.