Yes each image independently shows the illusion -- different images are only to provide a variation i guess, since some proportions work better for some people

Yes each image independently shows the illusion -- different images are only to provide a variation i guess, since some proportions work better for some people than others I personally found the illusion not strong though definitely present This similar illusion but done with different colors and patters was much more vivid and strong for me ... check this out: "Expanding Pupils" second image onwards http://www.psy.ritsumei.ac.jp/~akitaoka/motion35e.html http://www.psy.ritsumei.ac.jp/~akitaoka/motion35e.html