What color is this dot? New illusion demonstrates weird vision quirk(www.scientificamerican.com)
2 pointsby Brajeshwar3 hours ago1 comment
  • JohnFen2 hours ago
    I can't remember a time before when an optical illusion didn't work for me, but this 100% doesn't work for me.
    • Teknomadix2 hours ago
      Here I see 9 distinctly purple dots. On a phone screen. The depth of field about a half arms length. Despite what the article says, I see all dots — the one I'm focused upon — as well as all those in peripheral vision as purple. The illusion does not apply to my visual cortex.

      Back to the drawing board.

      • JohnFen2 hours ago
        I think I may have found the reason in the Maxwell's Spot PDF the article links to. It says:

        "The reason why this illusion [Maxwell's Spot] does not tend to be clearly visible with LCDs may be because the peak wavelength of blue in LCDs is on the shorter wavelength side than 460nm."

        I don't know what technology my monitor is using, but it's possible it's LCD. Or maybe OLEDs have a similar color shift.