The picture on the left looks a little strange, some jumbled monkeys there. It will be worth your time to fixate it for at least 10 seconds. Let your gaze “hang” on the tiny red target at the centre, making ready to move your mouse over the image thereafter. On the white background you may recognize a face, a topic of 2009.
Alternatively: after fixation, close your eyes. After a few seconds a face will appear. if the second face does n't appear try again.