Reviewing all the blogs that I follow every day (I didnāt have to go too far, really) I found in (of course) IonLitio a truly spectacular optical illusion, to the point of believing that the changes you see in the image are really true.
The only thing you have to do is stare at the cross in the center of the image, and after a few seconds, we will see how the pink dots in the image disappear. Rafa (From IonLitio) says that if you look closely, you will see a green circle surrounding the central cross, but I am not able to see it clearly.
More optical illusions at IonLitio