Over 80 years of life, a person spends an average of 3.5 years just blinking
We blink approximately 15 times per minute. Most of the time this happens involuntarily, and each time we lose visual contact with the world for a fraction of a second. And we don’t notice it at all! In our consciousness, there are no black screens, no sensation of a “missed frame.” Why does our brain hide these gaps in reality from us?
The Main Human Sense Organ
For us, vision is the primary source of information. According to How Stuff Works, about 30% of the neurons in the cerebral cortex are dedicated to processing visual information. Meanwhile, only 8% are allocated to touch. Given this arrangement, losing visual contact with reality every 4–5 seconds seems wasteful.
But we don’t notice it. At all. After each blink, the world seems to freeze in place, as if nothing happened. No black screens, no sensation of a “missed frame.” How does the brain pull off this trick?
INTERESTING FACT: Blinking isn't just for moistening the eyes. Scientists have found that blinking also improves brain function.
What We See When We Blink
Scientists from the University of Illinois decided to get to the bottom of this. They took three groups of students with normal vision and conducted a clever experiment. A total of 48 people participated.
The concept was simple: a blue letter “A” appeared on the screen. A special sensor tracked natural blinks in the first group of volunteers. The second group deliberately did not blink. Participants had to estimate how long the letter remained on the screen.
Before this, science had two theories:
- Either the brain preserves a memory of the image during the blink;
- Or it retroactively “patches” the image back to the start of the blink.
But the results outsmarted everyone. It turned out that the brain simply ignores blinks.
The experiment showed that the brain neither preserved the image nor patched it in. It did something simpler — it simply cut that chunk out of reality.
Imagine you’re editing a video and simply delete a few frames. The viewer won’t notice the splice if the sound and overall picture don’t change. The brain does the same thing: it receives an internal signal:
Okay, this is going to be our own blink, don’t panic, this isn’t an external disturbance.
And simply ignores that interval.
By the way, this is confirmed by earlier research. If you turn off the light externally for the same fraction of a second, we notice it. But our own blink — no. Because the brain knows the difference:
That was me blinking, everything is under control.
So Why Don’t We Notice Blinking?
In short: the brain doesn’t try to fill in the gaps with an image. It simply erases them from your perception. You don’t see darkness during a blink because for your consciousness, that interval of time doesn’t exist. The brain receives the command “cease recording,” and you smoothly transition from the image before the blink to the image after.
