When we visit the doctor, we routinely measure blood pressure, cholesterol, glucose, weight, and heart rate. For years, we’ve known that early life experiences—especially stress and adversity—leave long-lasting marks on the nervous system. But we rarely stop to ask: How can we see those marks? That’s where the eye comes in. Why the Eye Reveals the Brain The corneal nerve plexus is a dense network of sensory nerves at the front of the eye. It’s part of the peripheral nervous ...