What happens when we glance around a room? How do we trust what we see in fleeting moments? In The World at a Glance, Edward S. Casey describes how glancing counts for more of human perception than previously imagined. An entire universe is perceived in a glance, but our quick and uncommitted attention prevents examination of these rapid acts and processes. While breaking down this paradox, Casey surveys the glance as an essential way by which we acquaint ourselves with the world. This experiential tour-de-force reveals what happens in a blink of an eye. It will become a landmark study in phenomenology, philosophy, environmental philosophy, and the philosophy of mind.