Disappearing Dot Illusion

Put your face close to the screen and stare at the black cross in the center. Eventually, you will see a green dot. After that, all the purple dots will disappear. This effect is known as Troxler's fading [1].


  • [Snapshot]
  • [Snapshot]
  • [Snapshot]


[1] Wikipedia, Troxler's fading.
    • Share:

Embed Interactive Demonstration New!

Just copy and paste this snippet of JavaScript code into your website or blog to put the live Demonstration on your site. More details »

Files require Wolfram CDF Player or Mathematica.