Father of Optics

Ibn al-Haytham (also known as Alhacen or Alhazen), the "father of optics", was the first to resolve this argument, by refining intromission theory into what is now the modern accepted theory of vision in his influential Book of Optics (1021). He argued that vision is due to light from objects entering the eye, and he developed an early scientific method emphasizing extensive experimentation in order to prove this. He pioneered the scientific study of the psychology of visual perception, being the first scientist to argue that vision occurs in the brain, rather than the eyes. He pointed out that personal experience has an effect on what people see and how they see, and that vision and perception are subjective.
http://en.wikipedia.org/wiki/Visual_perception