
Is the cat going up or down the stairs? People on social media are debating which way the cat is walking. Depends on how you look at it, right? Here are some other optical illusions that can trick the eye.

This dress became a viral sensation as people debated online about whether its colors were blue and black or white and gold.

The squares marked A and B are actually the same shade, as shown in the illustration on the right.

As you scan over this image, do you see gray or black dots? It's called a scintillating grid illusion, made by superimposing white discs on the intersections of gray bars against a black background. Dark dots seem to appear and disappear rapidly at the intersections, although if you stare directly at a single intersection, the dark dot does not appear.

The center of this image, made only with squares, appears to bulge out, even though all of the lines are actually straight.

If you move your head while staring at these circles, they will appear to rotate or spin. But that movement is only an illusion.

Same with these circles. Move your head around while staring at them, then hold your head still. The circles will appear to rotate briefly.

