Came across a wonderful optical illusion. This is another example that we must exercise caution in believing that what we see is really representative of underlying reality, because there are unavoidably subjective issues with our senses. Seeking the best possible understanding of the world requires a more sophisticated model of how and why we perceive what we perceive.
In other words, to understand as well as possible, it is imperative to know your weaknesses.
How to see it:
“But now concentrate on the central green dot. You will see one or more of the yellow dots disappearing and then reappearing sporadically. They are not—this is an optical illusion. The dots remain and your brain simply doesn’t register their presence from time to time. Weird, eh?”