Do you see waves among these ellipses? Actually these shapes are not moving at all. The movement is your own perception!
Spiral Or Circles 2
This appears to be a spiral but if you follow the black and white dots you will see that, they form circles!!!
Do you see three white triangles in this picture? Well, it is your own perception as they do not exist with prominent borders.
Virtual Color Shade
Do you see a light shade of yellow between the interior and exterior borders? You would be surprised to know that the shade doesn't exists. The color of that region is absolutely white!