Change: There were only format changes (bold, italics, etc.) in this version. See this version for details. (Word count: 757)

Change: the white screen and blink oncea few (repeat)times 3. Who do you see? Anomalous Motion Illusion I left the best to last- keep a vomit bowl handy if you intend to stare at this for a protracted period! adapted from http://www.ritsumei.ac.jp/~akitaoka/index-e.html So What? These optical illusions   View changes from previous version. (Word count: 757)

Change: once and look (repeat) 4. Who do you see? Anomalous Motion Illusion I left the best to last- keep a vomit bowl handy if you intend to stare at this for a protracted period! adapted from http://www.ritsumei.ac.jp/~akitaoka/index-e.html So What? These optical illusions are largely just   View changes from previous version. (Word count: 778)

Change: 2. Look away and stare at a light coloured even surface like the ceiling (if none available, scroll down the page and look at the white computer screen) 3. Blink once. 4. Who do you see? Anomalous Motion Illusion I left the best to last-   View changes from previous version. (Word count: 771)

Change: These optical illusions are largely just a bit of fun. The Mach bands are relevant to plain film radiography because of the potential to produce the illusion of an enhanced interface between two structures. References 1. Mach bands. http://en.wikipedia.org/wiki/Mach_band 2 http://www.nku.edu/~issues/illusions/HermannGrid.htm 3. http://www.nku.edu/~issues/illusions/WhiteIllusion.htm 4. http://perceptualstuff.org/machbandsbasic.html 5. http://perceptualstuff.org/machbandext.html ....back to   View changes from previous version. (Word count: 679)

Change: than those on the right (3) adapted from : http://www.nku.edu/~issues/illusions/WhiteIllusion.htm with the black lines removed it is easier to see that they grey rectangles are the same shade of grey (3) Dynamic Luminance Effects "Look at the center of a figure and   View changes from previous version. (Word count: 641)

Change: The following figure has a motion effect that some have described as "flowing electricity". Watch out. Some people feel dizzy. The illusion combines Mach Bands and stripes (5) The Cornsweet Illusion The two grey blocks appear to be different shades   View changes from previous version. (Word count: 604)

Change: thanthose on the right (3) adapted from : http://www.nku.edu/~issues/illusions/WhiteIllusion.htm with the black lines removed it is easier to see that they grey rectangles are the same shade of grey (3) References 1. Mach bands. http://en.wikipedia.org/wiki/Mach_band 2 http://www.nku.edu/~issues/illusions/HermannGrid.htm 3. http://www.nku.edu/~issues/illusions/WhiteIllusion.htm ....back to the Applied Radiography home page   View changes from previous version. (Word count: 509)

Change: another example of the Mach Band band optical illusion. These are the same grey blocks separated by a white strip. They now appear as solid shades of grey. The Cornsweet Illusion The two grey blocks appear to be different shades   View changes from previous version. (Word count: 403)

Change: another eaxampleanotherexample of the Mach Band Band optical illusion. These are the same grey blocks separated by a whotewhite strip. They now appear as solid shades of grey. The Cornsweet Illusion The two grey blocks appear to be different   View changes from previous version. (Word count: 393)