a visual illusion wherein the two ends of a straight diagonal line appear to be offset from each other whenever the line seems to go behind a figure with parallel vertical borders.

POGGENDORF ILLUSION: "The Poggendorf illusion was aptly named for the German physicist who founded it names Johann Christian Poggendorf."
Cite this page: N., Pam M.S., "POGGENDORF ILLUSION," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/poggendorf-illusion/ (accessed May 18, 2021).