In the black and white fields, the curve is obvious (black and white, get it?) even though the lines within the curved lines are staggered.
The curved lines having alternating black and white coloration, but the ones that have the "break" between the black and white are at the top and bottom of the "sine wave" are the ones that seem to appear straight .... In The Grey Area.
It's that grey area background that most easily fools the eye and brain into "seeing" what is not there.
Just one more evidence (IMO) for the infallibility of the Bible.
Let God be true and every man a liar.
Before you jump all over me with, "HOW did you get there from an optical illusion " ....
Christians get it.