This, ladies and gentlegeeks, is Ninio’s extinction illusion. The illusion features 12 evenly distributed black dots, which you probably cannot see all at once, unless you’re some kind of super human. The maximum number of dots I can see is 6, but apparently, some people can see all twelves, and most only see 4.

From the author:

When the white disks in a scintillating grid are reduced in size, and outlined in black, they tend to disappear. One sees only a few of them at a time, in clusters which move erratically on the page. Where they are not seen, the grey alleys seem to be continuous, generating grey crossings that are not actually present. Some black sparkling can be seen at those crossings where no disk is seen. The illusion also works in reverse contrast.

How man can you see?

[Via Sploid]