In baseball, a good curveball can turn a hitter's legs to jelly, traveling on a devastating arc that causes him to wave his bat awkwardly at where the baseball used to be. In science, a good curveball can tell researchers a lot about the differences between what a person sees when an object is viewed via the eye's narrow band of central (or foveal) vision, compared with what the object looks like when spotted through one's peripheral vision.
This is one of the toughest optical illusions that I have came across in quite some time. It’s yet another optical illusion that is definitely going to mess with your perception. This is another one of those optical illusions that a... Read Post
Phil "Bad Astronomy" Plait deconstructs Brusspup's "Crazy Circle Illusion" and ties it to the wonderful classic art/science/toy Spirograph. Read Post