books.google.com - Contents: Introduction; Ptolemy: A Biographical Sketch; The OpticsÓ: A Biographical Sketch; An Overview of the OpticsÓ; The Historical Influence of the OpticsÓ; English Translation; & Bibliography. The English translation of this text is based upon Albert Lejeune's critical Latin text of 1956, which...http://books.google.com/books/about/Ptolemy_s_Theory_of_Visual_Perception.html?id=mhLVHR5QAQkC&utm_source=gb-gplus-sharePtolemy's Theory of Visual Perception
