Of course it's an optical illusion.  There are no black dots, nor does the picture change at all

Of course, there are no circles in this picture....it's an optical illusion.

What do you see in this picture?  A womans face or a saxophone player?

 

 

What do you see in this picture?  A face or the word "Liar"?

Can you see the three faces in this picture?


There is an old man, and old woman and a young woman.

There are no triangles in this picture.  The illusion of triangles is created by the other figures in the picture.