Iridology has a similar history and is based upon the observation of a single owl. Apparently, Ignatz von Peczely, a Hungarian physician, noticed that an owl that had injured its wing had a particular fleck of color in the iris of its eye. He set the owl’s wing, which later healed well. Dr. Peczely then noticed that the fleck of color in the owl’s iris had disappeared. From this single observation, Dr. Peczely developed a system of diagnosing all human disease by the pattern of colors in the iris.
