Some #opticalIllusions feel like #sigils

If you're fascinated by visual illusions, you have to check out Akiyoshi Kitaoka's illusion pages! As a Professor of Psychology at Ritsumeikan University in Japan, Kitaoka has been studying optical illusions and 3D effects for years. Just a heads up, though, some of these illusions might make you feel dizzy or sick! #AkiyoshiKitaoka #opticalillusions #visualperception https://www.ritsumei.ac.jp/~akitaoka/index-e.html

@Mooncake These impossible shape ones are pretty cool. It takes a moment to figure out why they don't make sense. This particular one is called a Penrose triangle. The top connects to the bottom without "going down." #OpticalIllusions

@Mooncake I see it! The cat! I'll have to go find some to post. #OpticalIllusions

Maybe optical il-lu-SIONS? #OpticalIllusions