The surprising truth about Ibn al-Haytham.

Ibn al-Haytham, Latinized as Alhazen, was a mathematician, astronomer, and physicist of the Islamic Golden Age from present-day Iraq.

Ibn al-Haytham, Latinized as Alhazen, was a mathematician, astronomer, and physicist of the Islamic Golden Age from present-day 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.