Preface, The Influence of Early Visual Experience on Visual Perception, The Development of Visually Guided Behavior, The Rediscovery of Adaptability in the Visual System: Effects of Extrinsic and Intrinsic Chromatic Dispersion, Insight or Out of Sight?: Two Examples of Perceptual Plasticity in the Human Adult, Locus Questions in Visual Science, Neural Images: The Physiological Basis of Spatial Vision, Spatial-Frequency Channels in Human Vision: Detecting Edges Without Edge Detectors, Spatial-Frequency Channels in One-, Two-, and Three-Dimensional Vision: Variations on an Auditory Theme by Bekesy, Masking and the Unmasking of Distributed Representations in the Visual System, Tutorial: The Joy of Fourier Analysis, Author Index, Subject Index