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When we close our eyes are we "seeing" dark or do our eyes shutdown?
#1
When we close our eyes are we "seeing" dark or do our eyes shutdown?
Guys....
I just closed my eyes and we'll you know saw dark
So am I seeing dark or did my eyes "shutdown" and the end result is I saw nothing, ie, dark?
If I'm seeing dark my eyes are still working so how can it be that my eyes rest when I close them..? 🤔
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#2
RE: When we close our eyes are we "seeing" dark or do our eyes shutdown?
You're seeing dark. Even if my lids are closed I can tell if the light is on or off, and the brightness also wakes me up in the morning if I don't have a sleep mask on. So I know our eyes don't shut down.

They still rest bc they are not picking up any information when all there is is darkness.
"Of course, everyone will claim they respect someone who tries to speak the truth, but in reality, this is a rare quality. Most respect those who speak truths they agree with, and their respect for the speaking only extends as far as their realm of personal agreement. It is less common, almost to the point of becoming a saintly virtue, that someone truly respects and loves the truth seeker, even when their conclusions differ wildly." 

-walsh
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#3
RE: When we close our eyes are we "seeing" dark or do our eyes shutdown?
As C/L suggested, light stimulates the nerves in the retina which transmits a message to your brain that says "it's morning, asshole!  Let's get your ass out of bed."


( Or words to that effect.)
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#4
RE: When we close our eyes are we "seeing" dark or do our eyes shutdown?
Your eyelids are not completely opaque.   Skin and underlying fat and muscle tissues are partially translucent.   Even if you close your eye lids light from outside, although attenuated and reddened by the blood vessels in the skin and muscle of your eyelids, still reaches your eyes.  That’s why you can sense whether it is bright or dark outside event if you close your eyes.

Light is made up of entities called photons.   You see when your retina, the light sensing tissue at the back of your eye balls, registers incoming visible light photons.  In typical night time, millions of visible photons still reach your eyes per second.  Experiments have shown human retina and associated optical nerve and vision center in your brain are capable of being conditioned to become so extremely sensitive it can register individual visible light photons.  Let a experimental subject be conditioned to total darkness by leaving him in an absolutely light proof totally dark room for a few days.  His eyes would become so sensitive you can then shine a light source at his eyes so dim and transient it only sends out a single photon.  The human subject can correctly call out those individual photons as they are Emitted

You can’t even in theory be more sensitive to light than that.

However, it still takes photons for you to see.   When there are no photons, the eyes do not shut down.  They are still active and eagerly awaiting those photons.   They simply have no photons to register.

You don’t see “dark”,  true dark is the state of not seeing anything, even a stray photon.
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#5
RE: When we close our eyes are we "seeing" dark or do our eyes shutdown?
Here's a question.

Which animal doesn't have eyelids?
No God, No fear.
Know God, Know fear.
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#6
RE: When we close our eyes are we "seeing" dark or do our eyes shutdown?
(December 7, 2017 at 2:33 am)ignoramus Wrote: Here's a question.

Which animal doesn't have eyelids?

Hmm, I believe Eyelids are mainly found amongst vertebrates. Most animals that have eyes are not vertebrates. Most vertebrates are fish and fish have no eyelids. So my hunch is point to any random animal that has eyes, and there is probably >95% chance it has no lids.
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#7
RE: When we close our eyes are we "seeing" dark or do our eyes shutdown?
(December 7, 2017 at 2:33 am)ignoramus Wrote: Here's a question.

Which animal doesn't have eyelids?

I think fish have no eyelids ... they sleep with their eyes open ... but it's  a fish....but there are animals that have a third eyelid like camels or frogs... Tongue
"Alone is what I have. Alone protects me." 
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“The important thing is not to stop questioning. Curiosity has its own reason for existence. One cannot help but be in awe when he contemplates the mysteries of eternity, of life, of the marvelous structure of reality. It is enough if one tries merely to comprehend a little of this mystery each day."
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#8
RE: When we close our eyes are we "seeing" dark or do our eyes shutdown?
Is it logical to assume full time marine animals don't need eyelids because their eyes never dry out? Is that the only evolutionary function of eyelids?
And maybe to keep dust out, etc

Another question... A seal has eyelids, therefore tearducts ... Does it ever have to blink whilst underwater?
No God, No fear.
Know God, Know fear.
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#9
RE: When we close our eyes are we "seeing" dark or do our eyes shutdown?
So if they don't shutdown and we're still "seeing" dark how come our eyes rest when we close them, aren't they always working then 😵

And if they're still being used and we're "seeing" the dark then how come we can't sleep with eyes open in a dark room
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#10
RE: When we close our eyes are we "seeing" dark or do our eyes shutdown?
Pooley, pretty sure there's a microswitch that activates when the eyelids are shut. It sends the sleep command to the brain...
No God, No fear.
Know God, Know fear.
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