We take a lot of what we see for granted. But sometimes, our visual understanding of the world can change. Take Alice in Wonderland Syndrome — a condition estimated to impact 10-20% of people in their lifetime. During an episode, people can experience objects as being either too big or too small. Then there’s prosopagnosia, a condition where people can’t recognize other folks’ faces, even if they are familiar with the person. Studying these conditions could help us understand the fundamentals of how our brains help us view the world around us. This is a video from the 2023 Brain Awareness Video Contest. Created by Alexandra Gusinski.