Optical illusions come in all shapes, sizes, and levels of stupidity. There was the blurry ham picture that made Reddit scratch its head. (Really.) And the one that turned out to just be a cigar ...

Even when we consciously know two lines are the same length, why can't we help seeing them as different? ILLUSIONS ARE ANOMALIES that can reveal clues about the mysterious workings of the brain to ...

1) Color constancy is described above—the brain’s ability to interpret the surface color reflectance of an object as unchanging under different sources of light having different wavelength ...

PERHAPS it is difficult to demonstrate primary constancy scaling independently of the distortion illusions, but its effects are not limited to plane figures. For example, the apparent size of the Moon ...