The Hunterian Lectures on Colour-Vision and Colour-Blindness

In February 1911, a British eye surgeon stood before the Royal College of Surgeons and delivered a series of lectures that would reshape our understanding of human vision. F.W. Edridge-Green had spent decades studying how the eye perceives color, and in these pages he presents both his theories on visual perception and his practical methods for detecting color blindness. He takes readers deep into the retina, explaining the distinct roles of rods and cones in how we see. But this is more than dry physiology: Edridge-Green was locked in scientific combat with other theorists, and his lectures read as a passionate argument for his own model of how light becomes color in the brain. He also gives us the lantern test he developed, a device that would become essential for identifying color blindness in railways, shipping, and beyond. Reading these lectures over a century later, we witness a scientist at the frontier of understanding, working with imperfect tools yet arriving at remarkably prescient insights. For anyone curious about the biology of vision, the history of science, or how we came to understand the extraordinary faculty of color perception.