In this section we will explain why we use eye tracking data to study human behavior.
Most eye tracking studies aim to identify and analyze patterns of visual attention of individuals as they perform specific tasks (e.g. reading, searching, scanning an image, driving, etc.). In these studies eye movements are typically analyzed in terms of fixations and saccades. During each saccade visual acuity is suppressed and, as a result, we are unable to see at all. We perceive the world visually only through fixations. The brain virtually integrates the visual images that we acquire through successive fixations into a visual scene or object.