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
What if applet does not run?

A few words

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)

40601335