Translator: Ghalia Turki. Validated: khalid marbou
Check this out:
We have a network, nothing special, just a regular network, the Wi-Fi network in particular.
But look closely at this white point in the center
Where the vertical and horizontal central lines intersect.
Look more closely. Do you notice anything funny about this point?
Yes, nothing.
But keep looking. Make yourself cranky and stare at her.
Now, keep your gaze fixed on this white point,
Check what is happening in your peripheral vision.
The other points, are they still white? Or has it become a strange gray flash?
Now look at this cake baking pan.
Oh, sorry, one of the cups is upside down. It is projecting up rather than concave down.
Wait, turn the pan. The other five are domed now.
Whichever it is, it is a defect of the pan.
Here we have a picture of Abraham Lincoln, and one upside down.
Nothing strange is going on here.
Wait, turn the flipped image to the right side. What did they do to Abraham?
These are just three optical illusions, pictures that seem like a trick to us.
How it works?
Do magical things happen in the pictures themselves?
While we can definitely throw gray flashes
In the circumferential white points of our moving grid,
First, we stress that we don't.
You'll see the same effect on a grid printed on a simple piece of paper.
In fact, this network is just a network. But not for the visual system in your brain.
Here's how it translates light information for this network.
The white intersection points are enclosed in a relatively whiter color on all four sides
More than any white point along the line.
Your retinal ganglion cells will notice that there is more white at the points of intersection
Because they are arranged so that the contrast increases in the center while decreasing it on the sides.
Better contrast means it's easier to see the edges of an object.
And things are what makes your brain and eyes see.
Your retinal ganglion cells do not respond as often as they should at intersections
Because there is greater inhibition on the sides to most adjacent white spots
Compared to the black outlined lines.
This is not just a defect in your eyes;
If you are able to see, then your illusions may deceive you wearing your glasses
Or in this paper or the computer screen right in front of you.
What optical illusions show us
It is the way in which visual information is collected by your photoreceptors and your brain
To be the three-dimensional world that you see around you,
Where the edges should get more attention
Because things with edges may help or kill you.
Look at that muffin pan again. Do you know what is causing the confusion here?
The visual cortex is making assumptions about the illumination of this image.
It expects the lighting to come from a single source, to shine from above.
Thus, the patterns of shadows may result from lighting down
On the sloping sides of a dome, or at the bottom of the pit.
If we can recreate these guides by drawing the shadow patterns,
Even on a flat piece of paper,
Our brain will instinctively create a three-dimensional shape or a convex shape.
Now for the bizarre, upside-down Lincoln portrait.
Facial stimulus activity in brain regions
Which have evolved specifically to enable us to recognize faces.
Such as the fusiform face area and others in the temporal and occipital region.
It also makes sense, that we are very social animals
With highly complex ways of interacting with each other.
When we see faces, we must realize that they are faces
And we discover what clarifies very quickly.
What we focus on the most is the mouth and the eyes.
This way we know if someone is angry at us or wants to be friends with us.
In the upside down photo of Lincoln's face
The mouth and eyes were actually upside down correctly,
So you didn't notice anything out of the ordinary.
But when we turned the whole image down, the most important parts of the face,
The eyes and the mouth were now turned upside down, and I realized something fishy was happening.
You realize that your brain has taken a shortcut and missed something.
But your brain wasn't too lazy, it was just so busy.
So spend cognitive energy as much as possible,
Using assumptions about visual information to form a modified view of the world.
Imagine your brain calling out these adaptations on the fast:
Well those boxes could be things.
Let's enhance the contrast between white and black on the sides with side damping.
Darken the corners!
Dark gray fading to light gray?
Assume that the sun's rays fall in the sky on an oblique curve. next one!
These eyes look like most of the eyes I've ever seen before, nothing strange is going on here. "
I have seen? Our optical illusions freed your brain from its work
As a busy filmmaker of 3D animated films in a studio inside your skull,
It allocates cognitive energy and builds the world on the journey
Mostly - but not always - tried and true tricks