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This book consists of 624 pages, of which about 291 pages comprise the text. There are excellent illustrations, a good index of subjects and a separate index of authors. At the end of each of the ten chapters there is a complete list of references, with titles. The foreword is by the late Dr. Sanford R. Gifford, to whose memory the book is dedicated.
Chapter I, consisting of about 28 pages of text, is ambiguously entitled "The History of the Crystalline Lens." It describes the evolution of knowledge of the lens from 2250 B.C. to modern times. Accommodation and the optical properties of the lens are not dealt with at length anywhere in the book, but in this chapter more than a page is given to proof that accommodation depends on change in shape of the lens.
Chapter II deals with the embryonic development of the lens in lower animals