no no no,they also gets oxygen supply from the back of your eyelids (and also oxygen dissolved in you tears). otherwise you’d have to keep your eyes open when you sleep.edit: to correct inaccurate statements.
So that’s why we’re not supported to open our eyes under water. Our eyeballs are suffocating!
If our eyes can absorb oxygen from tears then they can certainly do so when submerged provided the water is sufficiently oxygenated.
The body is crazy. But I reckon they could survive for a while without air anyways, right?
That’s crazy
So if you sleep for too long you go blind?
No, the capillaries on your eyelids supply o2.
If you fall asleep with contacts on or wear them too long, blocking the supply of O2, you will grow capillaries infront of your cornea. This is bad for vision.
Curious, I definately forgot to take it my contacts from time to time and it isn’t fun waking up in them(though being able to see probably is kinda fun until you feel the discomfort anyways). Im curious about the whole process now, I’m going to try and find out more about this, wish me luck!
Your eyedoctor can show you the capillaries in question next time you get your script renewed.
Oh I had laser eyes installed, but good to know about when I get older if they don’t stop working as good. Thanks
So like … Swim goggles will suffocate my eyes? 😦
Eventually, yeah. I had an issue with contacts when I was younger as I have to wear thick toric lenses, which allow very little oxygen through. I would wear them way too long, and I was warned that continuing to do so could cause eventually cause blindness
he loves to breathe the oxygen
speak for yourself
read it up on cornea wikipedia, seems to be true :o
Instead, oxygen dissolves in tears and then diffuses throughout the cornea to keep it healthy.[5] Similarly, nutrients are transported via diffusion from the tear fluid through the outside surface and the aqueous humour through the inside surface.
Also little known fact, balls are actually eyeballs. Back in the earlier days of evolution you could still see with them. It’s also where the term 4 eyes comes from.
its how we used to be able to tell if we wiped enough
ladies had to get a friend to help them thats why that whole women going to the bathroom together thing came from. because they dont have balls. sadly
i came, i saw, i absorbed oxygen directly from the air
Also your immune system will attack your eyes if it knows they’re there. Eyes are weird.
As someone living with an eye injury, this is a deep seated fear.
New phobia unlocked
What? Why would the immune system attack the eyes?
Our immune system is trained how to differentiate between what is supposed to be there and what isn’t only on things floating around in the blood. Certain parts of the human body - like the liquids inside our eyes - are permanently isolated from the bloodstream, and so our immune system will never have encountered anything like it. That’s why if it ever enters the bloodstream it can trigger an immune response.
Well that’s just terrifying
Here’s how fucked up it is imagine the only difference between having eyes and not having eyes is one tiny small area that if it breaks at any moment the immune system can “find” your eyes which is why eye damage needs to be treated right away. One tiny barrier keeps your eyes from being identified and if that breaks your worst nightmare.
It’s like the brain. There’s a tiny barrier that keeps the immune system out of it, and it breaking down is thought to be the cause of a few major brain conditions.
What is this tiny barrier called and where is it?
There’s multiple but the one I’m talking about is corneal epithelium. https://biologyinsights.com/immune-system-eyes-mechanisms-of-ocular-protection/
Edit:it can trigger an immune response
It’ll do the same to a man’s balls, too
What about buttholes?
They do have blood, as any ER doc could tell you.
However, they can also breathe in a manner of speaking. Enough that it’s proposed as a possible method to keep someone alive if their lungs don’t work.
I honestly did not expect this answer.
… dare I click on this link at work?
They’re just full of shit.
today I learned
That’s also why certain contact lenses can’t be worn overnight or for long periods of time because they aren’t as breathable. At least that’s what my eye doctor said when I got them.
Yep and if you wear them for too long your body will grow new blood vessels to supply your oxygen-starved eyes with what they need. These new blood vessels can cover your retina and can lead to blindness.
Learned that one by sleeping in daily disposable contacts for a while and losing a significant portion of my peripheral vision.
Oh damn, did not know that was a risk
Forever?
Yup!
Bet you didn’t see that coming
E is for eye A is for are Y is for you
Eayyyyyyy
Kind of. This happened to me. My vision was noticeably bad when I was diagnosed with it, but once I started taking care of my eyes, they blood vessels shriveled and shrank, and my vision mostly improved to the point where I didn’t notice it anymore.
100% recovered, no. But better.
That’s correct. It’s generally recommended for lenses to have at least over 100 Dk/t for sleep and they need to be approved for that. Dk/t is the measured oxygen transmission through the lens material, the higher, the better. I would not recommend lenses with Dk/t of 30 and under even for daily wear as they starve eyes of oxygen. Especially since there are very affordable ones with very high Dk/t like Miru and Biofinity (around 160 iirc).
They don’t need oxygen when I’m sleeping?
It is the only part of the body without a blood supply. Instead, it receives nutrients via aqueous humor (the liquid between the cornea and vitreous).
Instead, oxygen dissolves in tears and then diffuses throughout the cornea to keep it healthy.[5] Similarly, nutrients are transported via diffusion from the tear fluid through the outside surface and the aqueous humour through the inside surface.
And because that seemed lacking still and I’m too dumb to figure it out ChatGPT’s response:
The palpebral conjunctival blood vessels and the capillaries of the eyelids supply oxygen to the tear film behind closed lids. Oxygen diffuses from these vessels into the cornea.
My brother sleeps with his eyes party open. He must be eye oxygenmaxxing. Superior eyeballs.
You have a high concentration of blood vessels on the inside of your eyelids, which are kept in contact with the cornea by tears. It doesn’t only let oxygen through, some parts of blood (like lymph and antibodies) can also travel through the tears and into your cornea.
How does it not get damaged if we’re asleep and our eyes are closed?
Tear fluid also provides oxygen
