The Man Who Invented the Colorblindness Test (and Why It Became Mandatory)
In 1794, a chemist in Manchester, England, noticed something odd about a pink geranium. Under candlelight, it looked blue to him. His friends insisted it […]
Why Judges in Ancient China Wore Sunglasses in Court
Picture a courtroom with no jury box, no gavel, and no witness stand as we’d recognize them, but with a judge sitting at the front […]
The Traveling Eye Surgeons Who Cured Cataracts With a Needle and No Anesthesia
In March of 1750, a well-dressed Englishman rolled into Leipzig in a coach painted from top to bottom with giant eyeballs. A Latin motto ran […]