Roll on all kinds of visual illusions that cheat the brain

These visual trick effects are the images anticipated by the brain .

Visual illusions (Optical Illusions) are still known as deceiving eyes. But in fact they carry a different meaning, which is the image predicted by the brain.

When the retina receives light, the brain needs about 1/10 second to process and convert signals. And according to neurologist Mark Changizi, a tenth of a second of the brain's delay is the time it takes for the brain to "predict" the next possible image.

The 'predictive' ability of the brain plays an important role, keeping us from working on dangerous high-speed objects (such as cars on highways), or predators. move very fast . too much, they give us a better view of this particular ability of the brain.

1. The illusion Ebbinghaus

When you look at the picture below, you will say that the orange circle to the left is much smaller than the right circle?

In fact, they are the same size. The reason is that the size and distance of the circles next to the central circle have fooled the brain about the size and width of the two orange circles.

2. Fuzzy lines (Blurred lines)

Try to look closely at the picture and slowly look away, repeating it several times, you will see blurred lines in the picture moving in the distance between your eyes and the picture.

This is explained by just looking at the image while moving the distance, the retina must receive many images, activating the neurons of the brain. From there, the brain predicts the next image. With so many images appearing, the last thing we see is straight lines.

As always, each object appears, the brain will focus on determining the direction of the movement of the object, to help predict what the object will look like at a later time and faint lines appear.

3. Herring illusion

Do you see that the two red lines are bent?

In fact, these two straight red lines are parallel to each other.

Although our brains are "protesting" but the same lines of nanoscale as "sucking" the vision, giving our eyes a sense of direction towards a central point. In other words, our eyes are looking at the radiation lines in depth, feeling like they are moving, causing the two straight lines to be bent.

The 'curved' image of two straight lines is what the brain predicts about how two straight lines should look when the vision of the eye is following the 'direction' of the nanorectic lines to the central point.

The brain said that the center of the two lines 'must' goes further and the distance between the two 'right' lines is wider in the center. It all happened in 1/10 seconds. Subsequent hallucinations appear due to the change in perspective, the contrast of colors, the distance of the objects.

This Herring illusion is named after the German physicist - Ewald Hering.

4. Pink spots

The picture above includes light pink spots arranged in circles with a cross in the upper middle so gray. But if you only focus on looking at the cross, the pink spots will disappear, leaving a gray rectangle.

This is also known as the 'fade of Troxler', discovered in 1804 by the Swiss physicist Ignaz Paul Vital Troxler.

When the human eye focuses on one point, we tend to keep our eyes still. At this point, the pale pink dots lie on the periphery of the eye, as the gaze is directed to the black cross. These pink spots are present, but are not enough to stimulate nerve cells to maintain the image so they will gradually disappear.

5. Scintillating Grid illusion (Scintillating Grid illusion)

The sparkling mesh illusion is an illusion created by white dots on the junction of gray lines on a black background. The black dots are always hidden around the net, so the name is 'sparkling'.

Just like the pink point illusion, black dots appear only in the periphery of the retina, not enough to stimulate nerve cells to maintain their image continuously so they are sometimes "quickly hidden. Show ".

6. Illusion Café wall - cafe wall

You may find these are "black-and-white" lines, but they are actually parallel lines.

This illusion was discovered by British psychologist Richard Gregory when he happened to see a wall of Bristol cafe.

Scientists have demonstrated that it is the distance between the tiles and the row of bricks, and the contrast between the white and black colors that are responsible for this phenomenon.

7. Snake illusion (Rotating Snake)

When you look at the image below, you will see circles moving, but in fact they stand still.

A Japanese professor - Akiyoshi Kitaoka also calls this 'peripheral vision of the retina' - the hallucinations of motion that occur at the visual boundary region. When looking to the side of the photo, this illusion is more obvious.

Previous studies have suggested that this illusion is triggered by slow-moving eyes when looking at the picture. But in 2012, neuroscientist Susana Martinez proved the opposite, which was due to the fast-moving eyes.

8. The contrasting rectangles

This is an illusion due to the contrast of colors. Do you see that the gray rectangles between the black bars are darker than the ones in the middle of the white bar?

But in fact, they have the same color. The greater the color contrast of the surrounding environment, the smaller the contrast of the object. This made our eyes feel like contrasting rectangles of different colors.