Color enhanced portrait of Abu Ali al-Hasan ibn al-Hasan ibn al-Haytham (Alhacen,Alhazen) (965-1040) was a Muslim,scientist and polymath described in various sources as either Arabic or Persian. He is frequently referred to as Ibn al-Haytham or al-Basri. Alhazen made significant contributions to the principles of optics,as well as to physics,astronomy,mathematics,ophthalmology,philosophy,visual perception,and to the scientific method. Alhazen wrote insightful commentaries on works by Aristotle,Ptolemy,and the Greek mathematician Euclid |