Book of Optics
Experimental evidence supported most of the propositions in his "Book of Optics" and grounded his theories of vision, light and colour, as well as his research in catoptrics and dioptrics. His legacy was elaborated through the 'reforming' of his "Optics" by Kamal al-Din al-Farisi (d. c. 1320) in the latter's "Kitab Tanqih al-Manazir" ("The Revision of" [Ibn al-Haytham's] "Optics").