I recently learned about studies that show that people with Schizophrenia are less likely to be fooled by optical illusion. I've found that I'm able to see through many illusions, particularly in black and white, but the mask is a different story. When it rotates, I can see it concave as the inside first comes into view and as it's rotating to the front again, but with the full view, I see it convex and rotating the opposite direction. Does anyone else have any experience with this illusion, and what might it mean?