Optical Illusion: What do you see, zigzags or curves?

When looking at the image above, what do you see? Wavy lines or zigzag lines? I see both, and according to psychologist Kohske Takahashi, who discovered this optical illusion in 2017, seeing zigzag lines means I have "curvature blindness."

In other words, there aren't really any zigzag lines, only curvy ones. — Read the rest