Edit: never mind figured it out: the "random buildings" aren't random but rather build alternative paths that you only really see in your peripheral vision
Pretty much any optical illusion that involves "random" patterns actually involves pseudorandom noise, just like adversarial generative networks use tailored pseudorandom noise to fool the discriminator.
The random-looking black and white "buldings" on each block have some very not random "curves" of contiguous white buildings. When you look at other parts of the image, your peripheral vision may interpret these white curves as the same thing as the perpendicular green "roads", giving the illusion that the roads are no longer all perpendicular when you look away.
As far as I know it relies on the fact that you only have clear vision in the central 20% of you FoV, and your brain just makes the rest up. Also the big blind spot
Just now looking at things the clear bit of my FoV feels like 20%...which is clearly suuuper scientific. I'm getting ill, and have enough energy to comment on the internet or fact check myself....not both.
Wikipedia says it's more like +/-1° or about 2° is where you have more cones than rods. +/-10° has elevated cones compared to other parts of your FOV
That being said, not sure how much I trust this graph given that I clearly have a blind spot on the right side for my right eye (temple side) but this marks it as only on the nose side? Unless I'm mistaken
Everyone's eyes are different. I'm sure there's a blind spot that's supposed to be where they say it is, but who's to say your eyes are exactly like the average eye?
The blind spot is where the nerves pass through the retina to reach your optic nerve. I was mistaken; because the image is flipped when it passes through the lens, the nose side has the blind spot but visually the hole is on the temple side, as is shown here
Ha, good point. I'm showing my age here. I understand our modern phone screens have resolution approaching that of good print, but when I think of a screen my brain still defaults to something like a 14" VGA at 57PPI :-)
