Experiments show we quickly adjust to seeing everything upside-down

In the middle of the 20th century, an Austrian professor turned a man’s eyesight exactly upside-down. After a short time, the man took this completely in his stride. Professor Theodor Erismann, of the University of Innsbruck, devised the experiment, performing it upon his assistant and student, Ivo Kohler. Kohler later wrote about it. The two of […]