Ibn al-Haytham’s Book of Optics reshapes how humanity understands vision
Book of Optics, written by Ibn al-Haytham in Cairo around 1005 C.E., overturned a thousand years of thinking by showing that we see because light enters the eye, not because the eye sends rays outward. He proved it through darkened-room experiments, careful observation, and mathematics. His seven volumes shaped the science of light for centuries after.








