I learned about the blind spot in my Visual Analytics course during my Masters. I wasn't aware of this phenomenon prior to that and it was fascinating to take the blind spot test and to learn that the brain interpolates vision for the blind spots using data from the surroundings, memory etc. so well that we never notice the blind spot.

I wonder if such a phenomenon occurs with people who lost sight during their life and aren't blind by birth, where the brain fills in the blanks based on memory.

On the blind spot test, cover the other letter with your fingertip for same effect, and watch your finger disappear. For some reason this is far more impressive to me.

Mind Blown. Not by the fact we have a blind spot, but how, like in the article it's not a black zone, but really the absence of any input that the brain tries to fill in. Now I'm curious to test how the brain interpolate on this area, like trying to put different background color or texture on each side of the blindspot.