All Seeing Eye

I just noticed something odd and I'm not finding any reference to what I have noticed.

When you look at the All Seeing Eye on the back of a US One Dollar Bill. The Pyramid and the Eye itself have depth (3d If you will) as well as rest of the seen even the rays of light protruding from the triangle that the eye is peering through. But the exterior of the triangle residing on the pyramid side of the seen seem to be 2d or flat where on the inside it appears to have depth in relationship to the eye. Does this strike anyone else as odd?