Troxler's fading or Troxler's effect is a phenomenon of visual perception. When one fixates on a particular point, after about 20 seconds or so, a stimulus away from the fixation point, in peripheral vision, will fade away and disappear. The effect is enhanced if the stimulus is small, is of low contrast or equiluminant, or is blurred. The effect is enhanced the further the stimulus is away from the fixation point.
Seriously, just stare at this picture for some 10-20 seconds – blinking is ok; you’ll see it vanish, bit by bit. This is called the Troxler effect, after the man who discovered it; what happens is that your visual system constantly adapts to all the external stimuli. This is why after spending a few moments [...]