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Aftereffect. Encyclopedia of visual illusions

At leisure / Visual (optical) illusions

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Man's face

Stare at the left image for 30 seconds. Then look at the right empty square. The face of Che Guevara should appear.

Woman's face

On the left picture is the negative of the woman's face. Look at the face for 30 seconds, then look at the right side of the drawing - the white image. You should see a positive image.

Stare at the center of the bulb's spiral for 30 seconds, then look at the empty square

You will see the light bulb turn on.

Motion Aftereffect

Look continuously for 30 seconds at the center of the rotating spiral.

Now look at the objects in the room or at someone's face.

Larger picture version.

Living XNUMXD surface

Look at the red dot in the center of the left picture for about a minute or two. Then look at the right picture. The right drawing comes to life and starts to move.

Aquarium

Look at the fish for 30 seconds, then look at the right picture. Did you see a fish in an aquarium?

McKay illusion

If, after considering this picture, you look at an empty wall, an aftereffect occurs, similar to moving grains of rice.

Letters in a circle

Look at the top picture for 30 seconds, then look at the bottom one. You should see the letters "a" inside the circle.

Ghost

Look at the ghost's mouth for 30 seconds, then look at the gate. See the reflection of the ghost in the gate?

mars control

Look at the red dot in the center for 15-30 seconds. Now start moving away from the monitor. You should see the gray vertical (blurred) lines start to expand. If it doesn't work, then try to start viewing from a closer distance from the monitor. This effect is explained by the paradox of lateral (peripheral) vision.

Mars eclipse

Look at the white dot in the center of the red circle. The longer, the stronger the effect. For example, 2 minutes. Always try to keep the white point in focus and not get lost. After a while, you will clearly see a bright red ring around the circle. Keep watching for about a minute. Don't turn your head. Now slowly move your eyes to the right drawing, while trying to keep the left drawing in focus. The circle should glow purple and the red circle should turn dark grey.

vanishing line

Look at the white square... and after a while the line at the bottom will disappear! (due to retinal fatigue). If it doesn't work, try changing the distance to the monitor or the size of the picture. The effect works if you look at the point without being distracted for 1-2 minutes.

fading color

Look at the center of the square for a few seconds. The squares in the center will begin to gradually disappear.

Another fading color option:

Red or blue?

Look in the center and after a while the circles will be dominated by red, but look away a bit and you will see that the blue color prevails!

Different colors become the same

Look at the point in the center without stopping for 30 seconds.

Now take a look at this photo.

You won't see any difference in color between the right and left halves of the photo.

baby photo

An illusion similar to the previous one.

Black and white snag

Stare at the black dot until the rectangle is filled. The photo will change to black and white, but you will see everything in colors.

Illusion of Hermann-Goering

The effect of physiological nystagmus.

If you stare at a black dot, trying not to take your eyes off it, then after about 30 seconds, the black and white parts of the image will begin to oscillate. If you then look at the white dot, you can see a set of white squares on a black background (i.e., a consistent image) superimposed on the real drawing. This consistent image will move around the drawing all the time, no matter how hard you try to keep it in place.

Disappearing Spots

Look closely at the dot in the center of the picture. After a while, the colored spots in the picture will disappear.

Whose portrait?

Focus your gaze on the red dot for 30 seconds, then move your gaze to the white sheet of paper or the ceiling. Learned?

colored beach

Focus on the red dot. After a while, the black and white beach will become colored.

Santa Claus

Look at the picture for about 30 seconds, then look at the wall or sheet of paper. Have you seen Santa Claus in color?

Mountains

Wait for the drawing to fully load. The drawing is animated. Focus on a point in the center. After 20 seconds you will see the next frame - a color photograph of the mountains. The photo is actually black and white though. And, what was the first frame - a negative mask, the image of which remained in the memory of your retina.

colored city

By focusing on the red dot, you can colorize a black and white city.

What lines do you prefer?

Look at the left picture for a while, and then turn your attention to the right one. What lines will you see - horizontal or vertical?

colored rose

If you focus on the left picture, and then look at the right one, you will see that the black and white rose has become colored.

colored rainbow

In the same way, you can color the rainbow.

Disappearing Spots

You see a circle of blue-violet spots that disappear in turn, as if moving in a circle. Direct your gaze to the crosshairs in the center, while watching with peripheral vision as the spots disappear. If you do everything right, you will see that a green spot is moving in a circle. Do not look away, and after a while the purple spots will disappear completely, and only the green running in a circle will remain!

vanishing stars

If you look at the moon for a long time, the stars will disappear.

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