Understanding vision is not a simple task. Nevertheless, a great deal is known about vision, more than about any of our other senses. The articles collected in this volume were chosen and organized with the intention of providing a survey of a number of different areas of vision research. Three major sections focus on the general categories of visual processing. The first section, "Eyes," contains selections dealing with color vision in fishes, the infrared "vision" of snakes, and the compound eye of insects. The next section, "Pathways to the Mind's Eye," includes articles on the brain mechanisms of vision, negative aftereffects in visual perception, the perception of moving targets, and hidden visual processes. The final section, "In the Mind's Eye," provides information on subjective contours, geometrical illusions, the interpretation of visual illusions, "turning something over" in the mind, and hallucinations. Included is a bibliography and an index. (TW)