This textbook provides a comprehensive overview of the sensory processes leading to perception, with an emphasis on the physiological bases for the phenomena. The visual system is discussed in depth, with parallels drawn in subsequent treatments of the auditory system, somatosensory and pain systems, gustatory system, and olfactory system. In each case, the discussion begins with the physical stimulus, progresses through anatomy and physiology, and concludes with perceptual phenomenology. The intent is to be scholarly but accessible, engaging the undergraduate student with real-life examples and demonstrations while providing a firm stepping-off point for advanced students. This edition includes a CD containing a computer program that provides demonstrations and simulations to explain, clarify and make accessible phenomena normally confined to the laboratory.