This is a print on demand Publication. This is a reprint, this is not an original. Contents: Introduction; Ptolemy: A Biographical Sketch; The "Optics" A Biographical Sketch; An Overview of the "Optics"; The Historical Influence of the "Optics"; English Translation; & Bibliography. The English translation of this text is based upon Albert Lejeune's critical Latin text of 1956, which was reprinted in the 1990s along with a French translation & supplementary annotations. Illus.