Eye-tracking is a technique used in cognitive neuroscience to study how people focus their attention and process visual information. Special cameras or sensors track eye movements, measuring where and how long a person looks at different things. This helps researchers understand reading, decision-making, and even social interactions. Eye-tracking is also useful in studying brain disorders, such as autism or dyslexia, by revealing differences in visual attention. By analyzing these patterns, scientists gain insights into how the brain processes the world around us.