Applied illusionology 2
since December 11, 2010
Copyright Akiyoshi Kitaoka 2012 (October 10)
"A brief image for the detection of visual field deficits: Method of reduction of the extinction illusion"
One gazes at the center with one eye, and blue dots appear to extinguish soon. When the observer approach or move away from the image slowly, blue dots appear to emerge again. If there is a part which lacks blue dots, the part might possibly be a deficit of the visual field. The blind spots are observed easily. This method is effective in the range within about 15-deg eccentricity, depending on the size of the display or print.
Copyright Akiyoshi Kitaoka 2011 (June 19)
"Delboeuf illusion clock"
The circle at the center appears to be smaller than each of the others, though they are the same size.
Copyright Akiyoshi Kitaoka 2010 (December 11)