~~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.
this post was submitted on 25 Aug 2025
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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
Meanwhile I still can't breathe through my arsehole
skill issue
Also your immune system will attack your eyes if it knows they're there. Eyes are weird.
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.
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As someone living with an eye injury, this is a deep seated fear.
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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.
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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).
Quit using up all the oxygen.
It's mine, I saw it first!
heavy breathing
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.
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So like ... Swim goggles will suffocate my eyes? ๐ฆ
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
i came, i saw, i absorbed oxygen directly from the air
Lasic surgery first cuts the cornea leaving a little flap. The doc peals the eyeball then they shoot a laser beam in various places in a pattern to ablate the lens.
Then they put the flap back over like nothing happened, but that flat will never heal. That is why I will not be getting lasic thank you.
https://www.eyecenteroftexas.com/2019/06/does-corneal-flap-heal-lasik/
Why does this article from 2019 say otherwise?
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SMILE uses laproscopy, so the slit is only 3mm instead of 20mm for LASIK. Supposedly like a 3 day recovery time or maybe 2.
Also, does it really never heal?
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So what you're saying is, my eyes are also lungs?
More like a giant alveolus. But inside out. With a giant sphincter in the middle. That poops light.
Boy, after getting a notification with this reply I had a hell of a time trying to figure out what I could have possibly said to spur it
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Fun fact: your intestines are also lungs. Or maybe more accurately, lungs evolved from intestines. It turns out, you can oxygenate people by sticking an oxygen supply up their ass. Which is a possible treatment for people who have suffered respiratory failure.
Proof that I'm not just blowing hot air up your butt, except maybe I am: https://www.science.org/content/article/mammals-can-breathe-through-their-intestines
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