According to a new study, what we see in the periphery, just outside the direct focus of the eye, may sometimes be a visual illusion. Four examples of the uniformity illusion with — clockwise from top left — blurriness, color, density, and size. In these examples, the periphery is, respectively, blurrier, greener, less dense, or contains larger circles than the center. However, if you fixate the center of the image for a prolonged period...
