This book is a comprehensive review providing an overview of modern compound eye research. The historical development of the field is also sketched, referring in particular to the pioneering study of Sigmund Exner - whose 1891 monograph is at last available in English (please see below). Facets of Vision is also intended as a tribute to Professor H. Autrum, one of this century's major pioneers of the field. The present state of compound eye research is reviewed by acknowledged international experts, starting with optics and proceeding, through neural processing, to visually guided behaviour. Topics covered include: fundamental optical principles and diversity of optical design, photochemistry, phototransduction, eye pigments, neuroanatomy, circadian rhythms, early visual processing, neuropharmacology, colour vision, polarization vision, depth vision and motion detection. Comprising a coherent compilation of authoritative reviews, Facets of Vision will stand as a milestone in compound eye research.