This book is a detailed study of Aristotle's theory of the sense organs. It looks at all five sense organs and shows how Aristotle's views about them follow from his views about their function in perception. The book also shows how Aristotle's explanation of why we have sense organs is fundamentally different from that of modern science. The book should appeal to readers specifically interested in Aristotle's philosophy of mind and biology as well as to those generally interested in sense perception.