For example, think of Rubin's Vase, a well-known optical illusion . First we select the item to attend to and block out most of everything else. It's our brain's way of focusing on the task at hand to give it our attention. In this case, we have chosen to attend to the image above. Then, we organize the elements in our brain. Some individuals chose to organize the dark parts of the image as the foreground, and the light parts as the background, and some interpret it the other way around. Depending on how we organize the information at hand, we may interpret different things. Some individuals see a vase when attending to the black part of the image, and some individuals see two faces when focusing on the white parts of the image.