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15 facts about hormones that everyone who cares about their health should know
When it comes to hormones, most people remember stereotypes about female whims associated with changes in the hormonal background. But in fact, hormones also have an effect on men. And…

Continue reading →

Deception everywhere: 7 eye features that can be hard to believe

Our eyes lie to us.

In fact, the human eye is a very “imperfect” organ. If you compare the visual system with cameras, you should immediately say that they are different from the word “completely” (although it would seem). The fact is that the human brain actively “intervenes” in the process of collecting visual information and corrects its perception, primarily-colors, shapes, and even the perception of time. Here are some interesting paradoxes.
1. Upside down
Science has long proved that the eye refracts light rays so that in its retina the image is reduced and inverted. The fact that the earth is below us, and the sky above – the merit of the brain. Back in the nineteenth century, doctors proved that if a person is constantly shown an inverted image, the brain will adapt to it in a few days.

2. Blind spot-blind
A blind spot is an area on the retina that does not feel light. Despite this fact, the picture is always solid for us. This is also due to the brain, which “completes” the image based on the information already received.

In order to see the blind spot, you need to close your right eye, and with your left look at the right cross, circled in the picture. The monitor and face should be held vertically. Now, without taking your eyes off the cross, you need to start moving and moving your face away from the monitor. In parallel with this, you need to watch the left cross. After a while, it will disappear.

3. I Refuse to watch
Saccades are” jumps ” of vision that the eye makes while looking at pictures, driving a car, looking at a mirror, and performing other similar actions. Each eye makes 2-3 “jumps” per second. In moments of shifting the gaze from one point to another, the eyes do not see anything. Vision is simply turned off by the brain.

4. Forward to the future
Chronostasis is another interesting phenomenon associated with the saccades already mentioned. The essence of the phenomenon is that our perception stretches the moments when a person has to look at something new.

The easiest way to check this phenomenon is as follows. We look at something for a long time, and then we look at the clock with the hands. The first movement of the second hand will appear longer than the rest. This is chronostasis.

5. Down with the unnecessary
The Troxler effect is an interesting feature of peripheral vision. Because of the presence of capillaries in the retina, our brain hides stationary objects from perception. This is done so that they do not overlap with the same capillaries.

6. People don’t see real flowers
Perhaps the most famous feature of our perception. The whole point is that the brain completes the image based on the full range of colors and surroundings. That is why the square ” A “will always be darker than the square” B”, despite the fact that they are painted in the same color. The same applies to the “chessboard” illusion. The squares marked on it are actually the same color.

7. Peripheral vision is weaker than it seems
The flasks and rods in the retina are not evenly spaced. The cells that sense colors are mostly clustered strictly in the center. This is the reason why peripheral vision has such poor resolution.

 

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