The visual processes involved in moving, reaching, grasping, and playing sports are complex interactions. For example, the action of moving the head provides useful cues to help interpret the visual information. Simultaneously, vision can provide important information about the actions and their control. This becomes a reiterative process. This process, and the interactions between vision and action, are the foci of this volume. This book contains contributions from scientists who are leaders in each of the several facets of the subject. The editors consider simple types of action, such as moving the eyes and head and body, as one would do while looking around or walking, as well as complex actions such as driving a car, catching a ball, or playing ping-pong.