Fix your eyes on the center for a while and shut your eyes. Then, you will see rings of rainbow-like color for a short time.
by Akiyoshi Kitaoka
Subjective color is observed.
By Akiyoshi Kitaoka
Even though the bright areas are completely light, it looks like they are slightly tinted in other colors.
by Baingio Pinna
The background of the top left image appears to be yellow-tinted and the background of the bottom right image appears to be blue-tinted.
"Paradoxical watercolor effect"
The square ring area (or corridor) appears to be slightly tinted yellow, though there is no yellow there.
"Mach band flowers"
When you look at the image, the left mach will keep getting sharper.
"The morning sunlight"
It appears as if intense morning sunlight were projected.
"Illusory blue ring"
This image is painted only with red pixels of different luminance and different saturation, but an illusory blue ring is observed.
There appears mist on the surface of a lake.
It appears as if a white square were in front of four black circles.
by Gaetano Kanizsa
A triangle appears to be formed with vertices in the centers of the three circles.
Signals are identical between the two images, but the right one appears to be more salient than the left one.
Even though on the picture there are just three lines depicted, you can clearly see the letter "E".
If you look at the image from large distance, you will see Akiyoshi's face.
Vertical black stripes appear to be continual from top to bottom, going over the horizontal black region.
by P. Tynan and R. Seculer
"Spectrum spreading at night"
The colors appear to spread over the black background.
The perception of misty spirals is due to white phantoms.
If you focus long enough on the cross in the center, the pink dots around it will disappear. This illusion relies on the Troxler effect.
by Jeremy Hinton
"The Cheshire Cat"
If you focus for long enough on the cross in the middle of the picture, the Cheshire Cat will disappear. This is an example of the Troxler effect.
If you focus long enough on the cross in the middle of the window, these famous people will start looking like horrific monsters.
Stare at the image on the left for 30 seconds, then switch to the image on the right. The white rose will suddenly change its color to pink. This effect is called "afterimage".
by Gianni A. Sarcone, co-founder of Archimedes-Lab
If you focus long enough on the image on the left and then suddenly move your gaze to the aquarium on the right, a fish will appear inside.
Stare at the dot until the image changes its colors. Do you see the photo colorful or black and white?
"Red and yellow beads"
Watch the left cross more than ten seconds and move the gaze to the right cross. Illusory color beads will be observed above or below the cross.
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