Hermann Grid Illusion This applet requires Sun's Java VM 2 which your browser may perceive as a popup. Which it is not. If you want to see the applet work, visit Sun's website at http://www.java.com/en/download/index.jsp, download and install Java VM and enjoy the applet. Buy this applet A few words Copyright © 1996-2008 Alexander Bogomolny                   Hermann's Illusion L. Hermann came across this illusion in 1870 while reading a book on sound by John Tyndall. There seemed to be ghostly gray blobs between dark figures arranged in a matrix on a white background. If you look directly at a blob, it will disappear. References A. Seckel, The Art of Optical Illusions, Carlton Books, 2002 (#84) Copyright © 1996-2008 Alexander Bogomolny

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