A Sightless Visionary Invented One of the Coolest Inventions of Our Time
Ralph Teetor, born in 1890 in Hagerstown, Indiana, was one of the greatest inventors of the mid-20th century. At age 5, Teetor was playing with a knife and accidentally blinded one eye. In less than a year, he lost sight in his other eye due to a unique condition called sympathetic ophthalmia, in... Sign in to see full entry.