Pupillometry

Pupillometry is the measurement of the size and reactivity of the pupil, the black opening in the center of the eye. By tracking how the pupil dilates or contracts in response to stimuli or changes in lighting, researchers can gain insights into brain activity, cognitive processes, and emotional states. It’s a non-invasive way to understand how the brain processes information, stress, attention, or arousal. Pupillometry is used in psychology, neuroscience, and even market research to assess mental effort and emotional reactions objectively.