The human visual system is a lot more hacky than you might intuitively expect. It's really, really easy to mess with. https://en.wikipedia.org/wiki/Optical_ill

The human visual system is a lot more hacky than you might intuitively expect. It's really, really easy to mess with. https://en.wikipedia.org/wiki/Optical_illusion https://en.wikipedia.org/wiki/Optical_illusion