Count The Little Black Dots
This is a great illusion, actually it hurts my eyes. This one has been passed around a good bit, came across it originally a few years ago though it just popped up in our inbox again.
Usually known as the “Scintillation Grid“, was discovered by a chap named Elke Lingelbach of the Institut fur Augenoptik Aalen in Germany and is a modification of an illusion called the Hermann Grid, which dates way back to 1870!
At any rate, try counting those little black dots : )