First edition of a fundamental work on optics, and Alhazen’s work. Known as the father of optics, Alhazen (Ibn al-Haytham) is considered the greatest Muslim physicist and one of the great scientists of the Middle Ages unmatched in his field until Kepler half a millennium later. Alhazen’s theory of light and vision appears is neither identical with nor directly descended from any one of the theories known to have previously existed in antiquity or Islam. Rather he took existing theories apart, exploring and re-examining the subject, creating new foundations and making an organised discipline of the field of optics. Experiment in particular emerges in it as an explicit and identifiable methodological tool involving the manipulation of artificially constructed devices ... Risner's Latin edition made it available to such mathematicians as Kepler, Snell, Beekman, Fermat, Harriot, and Descartes, all of whom except the last directly referred to Alazen.