We can’t see the real black(feat. Things you see when you close your eyes)

“Things you see when you close your eyes”

Hello. This is Dr. Song, your ophthalmologist.

We can't see the real black(feat. Things you see when you close your eyes)

What do you think about darkest color you can see

Of course you would have thought that is black.

It’s dark black with no light at all .

We can't see the real black(feat. Things you see when you close your eyes)

But paradoxically, You need light to see black

We can't see the real black(feat. Things you see when you close your eyes)
darkest color

And the darkest color is closer to gray like picture than black.

visual noise

More precisely, this gray with noise This is it.

(You can also watch the video on my YouTube channel below)


What is black?

We can't see the real black(feat. Things you see when you close your eyes)

Let’s see how we can perceive darkness

We can't see the real black(feat. Things you see when you close your eyes)

Look around and If you see a black object, close your eyes while staringthat thing.

You can also completely block the light by covering your eyes with your hand.

We can't see the real black(feat. Things you see when you close your eyes)

Now in front of you, gray background that looks like something other than black will be seen

Now open your eyes and look at the black object again.

We can't see the real black(feat. Things you see when you close your eyes)

Uhm..? Black objects appear darkerthan when you block the light with your eyes closed.


Light perception process

How can we feel the light?

We can't see the real black(feat. Things you see when you close your eyes)

When light came into the eye, photoreceptor cells stimulated by light particles and electrical signalsare created

We can't see the real black(feat. Things you see when you close your eyes)

We can recognize the existence of lightby interpretation of that signal with our brain

We can't see the real black(feat. Things you see when you close your eyes)

But these photoreceptors produce tiny electrical signals even in the absence of light. It’s a fake signal.

We can't see the real black(feat. Things you see when you close your eyes)

The brain also interprets these signals as light, so we can see tiny tiny bits of light even in darkness without light.

We can't see the real black(feat. Things you see when you close your eyes)
Noise created by the gathering of small intrinsic ight

The combine of fake signals from over 100 million photoreceptor cells give us this noisy gray instead of a complete black.

What you see when you close your eyes

When you close your eyes to sleep, you can see such a light,

unusual patterns.

and unsual pattern. right?

This, too, is due to a fake signal from the photoreceptor itself.


How we can see blak?

We can't see the real black(feat. Things you see when you close your eyes)

But how can we see the black color that can be easily seen around us?

Because, in the process of recognizing the degree of lightness and darkness, contrast with the surroundings is more important than real brightness

Have you ever seen a dark night sky with no moon and no stars?

night sky
color of night sky

The actual night sky may look black, but it is closer to indigo blue.

We can't see the real black(feat. Things you see when you close your eyes)

Because there are twinkling stars, relatively we creates complete darkness in our brain that we can’t actually see.

Thank you for reading this long post.

Please use thecommunityfor questions.

A good article to read together

Entoptic phenomenom (bluefield entoptic phenomenom, photopsia, etc.) – Why is it only visible to me?

What is the light you see when you close your eyes? (Closed-Eye Hallucination)

시리즈 보기<< 망막 열공이 박리로 이어질 확률(feat. 망막 열공 레이저)

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