If you stare at this image long enough it completely disappears.

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[–]jgier98 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

My guess is that it relies on your color sensing retina cells getting "tired". Like if you have ever stared at a saturated color for a while then looked away then you see an afterimage of the opposite color. Staying looking at the color sort of cancells it out.