Ibn al-Haytham, Latinized as Alhazen, was a mathematician, astronomer, and physicist of the Islamic Golden Age from Iraq. Referred to as "the father of modern optics", he made significant contributions to the principles of optics and visual perception in particular. His most influential work is titled Kitāb al-Manāẓir, written during 1011–1021, which survived in a Latin edition. The works of Alhazen were frequently cited during the Scientific Revolution by Galileo Galilei, René Descartes, Johannes Kepler, and Christiaan Huygens. 965 – 1041; died at about 76. Alive at the same time as Murasaki Shikibu, William the Conqueror, Leif Erikson, Sylvester II, and Avicenna. Wiki link