There are some of my optical illusion collection from various resources. I am also not very sure the creators of this great stuff. You may have an illusion if you are tired, not calm enough and anxiety while looking the picture below. I not very encourage you to "crazy" this optical illusion, because I believe it may "damage" our daily life. However, I do believe it is necessary to understand this optical illusion to avoid any cheating and shift our paradigm.
