Do you notice that your visual center of focus shifts to different parts of the duck vs rabbit image? While I strongly agree with the ideas of the article, the

Do you notice that your visual center of focus shifts to different parts of the duck vs rabbit image? While I strongly agree with the ideas of the article, the fact that you have to focus on different parts of the image to shift perception, altering the "bottom up" sensory data your brain receives, undermines at least a little the use of this example.