Imagine not being able to recognize the people you see every single day; your coworkers, your friends, your loved ones. “Prosopagnosia,” or “face blindness,” as it’s commonly known, is a disorder that impacts about 1 in 50 people, and some may not even know about it. They may go their whole lives struggling to recognize the important people in their lives, often relying on non-facial information like hair color or gait to distinguish people. Neuropsychologist Ashok Jansari joins Dr. Sanjay Gupta to talk about how people with prosopagnosia see the world, the mechanism behind this condition, and what can we learn from those with these deficits about face recognition. To learn more about how CNN protects listener privacy, visit cnn.com/privacy