How many blue dots do you see? New optical illusion tricks the brain.

A new optical illusion excellently illustrates just how finicky our eyes are when it comes to perceiving colors.
Scientific American

What color is this dot? New illusion demonstrates weird vision quirk

Schulz-Hildebrandt, a biomedical optics engineer at Harvard Medical School, ran with his observation and developed an ...
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Purple isn’t real? Wild science claim says your brain fakes the color

Physicists and vision scientists are lining up behind a provocative claim: the rich color we call purple is not a property of light at all, but a story the brain tells itself. Light in the real world ...

Optical illusion test: Blue, purple or red-- what's the colour of this dot and the science behind it

A biomedical optics engineer discovered a visual illusion where purple dots appear bluer in peripheral vision. This ...