Written for young adults, it is the world's first full biography of the eleventh-century Muslim scholar known in the West as Alhazen or Alhacen.    From Wordnik.com.  [Thoughts: The Age of Intelligent Cameras] Reference

Alhacen, the "father of optics" as he was called, was the first to argue that vision was the result of light from objects entering the eye.    From Wordnik.com.  [CreationWiki - Recent changes [en]]

China I finde in a history of Tamerlan, which I haue in French, set out within these sixe yeeres by the abbat of Mortimer, dedicated to the French king that now reigneth, who confesseth that it was long since written in the Arabian tongue by one Alhacen a wise and valiant Captaine, employed by the said mighty prince in all his conquests of the foresaid kingdome.    From Wordnik.com.  [The Principal Navigations, Voyages, Traffiques, and Discoveries of The English Nation, Vol. XII., America, Part I.] Reference