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.
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.
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.
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.
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.
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).
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
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.
Wtf is going on with this timeline? First we have chess masters using their anus's to cheat. Then sticking a finger in your butt can fix abnormal heart rythms. And now we're going to find out that numerous of our top athletes all cheat by wearing butt plugs that release oxygen into their bowles.
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.
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!
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.
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.
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.
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.
Lol, they all say that, but when you read the fine print...."yes, the cornea does heal after LASIK. While the corneal flap may not fully "heal" in the sense of becoming completely indistinguishable from the surrounding tissue, it does reattach and become very stable."
It's like getting penis enlargement surgery buy then you get a warning afterwards.... It will fully heal, but just don't yank it too hard or hang from it for prolonged periods greater than half a second with a force equal or greater than 10 pounds. Levitra will also enlarge your left ear, which you should have trimmed to size every month by your local veterinarian.... WTF! No, my eyes are not little meat DSLR cameras to go mess around with. So I don't share the enthusiasm others do. I may indeed need a surgery in the future, but I'll postpone it.
I meant it more towards the value. Like your legs are not like a table's legs....yes both do similar things but your legs are much more singularity important to yourself than a table's legs.
This is the first I've heard of the eye flap healing being the issue with lasik. I always thought it was the fact that they can only take off just a bit of your lens with the lasers, and then if that continues to change shape as you age (which is common to normal aging eye issues), they can't go back and shoot more lasers because your lens has already become too thin from the earlier surgery.
There's a new thing where they have been able to reshape the lens by first acidifying it, then returning it to normal after massaging it into a new shape... Rabbit eyes so far, not human... Because rabbits can't scream like...like...like they were reshaping their eyeballs with acid.
This reminds me of my families collective trauma, the summer of screaming bunnies!
We had our cat and her new litter of 3 kittens go out into our wooded acre property that was heavily populated by bunnies…was. Their first summer was “active”. We tried to save the first 12 or so but by the second week of July we just numbly listened to the cries while trying to eat dinner. Fun times. Miss those cats though, even if they were murder hobos
when you say lens, do you mean cornea? i thought most myopia, hyperopia, and astigmatism was caused by problems with the shape of the cornea.
ok, i looked up this treatment, and it says "animal tissue tests", not "animal tests", so i suspect the rabbits are long past the point of being bothered :|
94 Comments
nialv7@lemmy.world · 171 pts · 351d
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.
cute_noker@feddit.dk · 7 pts · 350d
So that's why we're not supported to open our eyes under water. Our eyeballs are suffocating!
Schmoo@slrpnk.net · 3 pts · 349d
If our eyes can absorb oxygen from tears then they can certainly do so when submerged provided the water is sufficiently oxygenated.
cute_noker@feddit.dk · 2 pts · 348d
The body is crazy. But I reckon they could survive for a while without air anyways, right?
Zorsith@lemmy.blahaj.zone · 105 pts · 351d
Also your immune system will attack your eyes if it knows they're there. Eyes are weird.
Karjalan@lemmy.world · 49 pts · 351d
Well that's just terrifying
DeathsEmbrace@lemmy.world · 38 pts · 351d
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.
T156@lemmy.world · 12 pts · 350d
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.
icelimit@lemmy.ml · 10 pts · 351d
What is this tiny barrier called and where is it?
DeathsEmbrace@lemmy.world · 27 pts · 351d
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
zerodawn@leaf.dance · 8 pts · 350d
It'll do the same to a man's balls, too
Taleya@aussie.zone · 17 pts · 350d
As someone living with an eye injury, this is a deep seated fear.
rockerface@lemmy.cafe · 7 pts · 350d
New phobia unlocked
bennypr0fane@discuss.tchncs.de · 1 pts · 350d
What? Why would the immune system attack the eyes?
Schmoo@slrpnk.net · 7 pts · 349d
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.
chaospatterns@lemmy.world · 83 pts · 351d
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.
LikeableLime@piefed.social · 75 pts · 351d
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.
0xD@infosec.pub · 32 pts · 351d
Forever?
LikeableLime@piefed.social · 37 pts · 351d
Yup!
buffing_lecturer@leminal.space · 38 pts · 351d
Bet you didn't see that coming
Surp@lemmy.world · 2 pts · 350d
E is for eye A is for are Y is for you
Eayyyyyyy
Roopappy@lemmy.world · 1 pts · 349d
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.
CybranM@feddit.nu · 18 pts · 351d
Oh damn, did not know that was a risk
RejZoR@lemmy.ml · 24 pts · 351d
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).
angrystego@lemmy.world · 54 pts · 351d
Hugin@lemmy.world · 19 pts · 350d
Quit using up all the oxygen.
sausager@lemmy.world · 4 pts · 349d
It's mine, I saw it first!
phoenixz@lemmy.ca · 10 pts · 350d
heavy breathing
meme_historian@lemmy.dbzer0.com · 45 pts · 351d
So like ... Swim goggles will suffocate my eyes? 😦
hovercat@lemmy.blahaj.zone · 26 pts · 351d
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
spongebue@lemmy.world · 34 pts · 351d
So what you're saying is, my eyes are also lungs?
Sterile_Technique@lemmy.world · 52 pts · 351d
spongebue@lemmy.world · 67 pts · 351d
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
icelimit@lemmy.ml · 11 pts · 351d
Be careful the questions you throw into the void.
frezik@lemmy.blahaj.zone · 19 pts · 350d
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
Test_Tickles@lemmy.world · 5 pts · 350d
Wtf is going on with this timeline? First we have chess masters using their anus's to cheat. Then sticking a finger in your butt can fix abnormal heart rythms. And now we're going to find out that numerous of our top athletes all cheat by wearing butt plugs that release oxygen into their bowles.
SmoothOperator@lemmy.world · 4 pts · 350d
Wait till you hear about how fecal transplants can make you braver
AtariDump@lemmy.world · 2 pts · 349d
Page not found
Test_Tickles@lemmy.world · 2 pts · 349d
Made a change to the link, let me know if that works for you.
AtariDump@lemmy.world · 2 pts · 347d
Works, thanks!
T156@lemmy.world · 2 pts · 350d
Makes some sense. If it can absorb nutrients, it can probably absorb gases too.
shalafi@lemmy.world · 2 pts · 351d
He was out of breath.
buggybug@sh.itjust.works · 19 pts · 351d
i came, i saw, i absorbed oxygen directly from the air
glowing_hans@sopuli.xyz · 15 pts · 350d
read it up on cornea wikipedia, seems to be true :o
MonkderVierte@lemmy.zip · 15 pts · 351d
Skin breathes too.
bleistift2@sopuli.xyz · 20 pts · 351d
Source?
Donkter@lemmy.world · 64 pts · 350d
Mostly ocean flora but there's a lot that comes from the Amazon rainforest too.
MonkderVierte@lemmy.zip · 1 pts · 349d
Some biology science magazine years ago. Googling gives mixed results. At least the upper skin cells do breathe directly.
I'll update the text.
bleistift2@sopuli.xyz · 3 pts · 349d
Yep, but that’s not even close to 10%.
cute_noker@feddit.dk · 15 pts · 350d
So if you sleep for too long you go blind?
Alcoholicorn@mander.xyz · 32 pts · 350d
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.
Jarix@lemmy.world · 2 pts · 349d
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!
Alcoholicorn@mander.xyz · 2 pts · 349d
Your eyedoctor can show you the capillaries in question next time you get your script renewed.
Jarix@lemmy.world · 1 pts · 348d
Oh I had laser eyes installed, but good to know about when I get older if they don't stop working as good. Thanks
jodanlime@midwest.social · 14 pts · 351d
They don't need oxygen when I'm sleeping?
fuckwit_mcbumcrumble@lemmy.dbzer0.com · 25 pts · 351d
And because that seemed lacking still and I’m too dumb to figure it out ChatGPT’s response:
Catoblepas@piefed.blahaj.zone · 16 pts · 351d
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.
dingus@lemmy.world · 9 pts · 350d
My brother sleeps with his eyes party open. He must be eye oxygenmaxxing. Superior eyeballs.
Schlemmy@lemmy.ml · 12 pts · 349d
Meanwhile I still can't breathe through my arsehole
Swedneck@discuss.tchncs.de · 3 pts · 347d
skill issue
WhatGodIsMadeOf@feddit.org · 12 pts · 349d
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.
BigBananaDealer@lemmy.world · 11 pts · 349d
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
altphoto@lemmy.today · 12 pts · 350d
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.
Nikls94@lemmy.world · 17 pts · 350d
https://www.eyecenteroftexas.com/2019/06/does-corneal-flap-heal-lasik/
Why does this article from 2019 say otherwise?
altphoto@lemmy.today · 4 pts · 350d
Lol, they all say that, but when you read the fine print...."yes, the cornea does heal after LASIK. While the corneal flap may not fully "heal" in the sense of becoming completely indistinguishable from the surrounding tissue, it does reattach and become very stable."
It's like getting penis enlargement surgery buy then you get a warning afterwards.... It will fully heal, but just don't yank it too hard or hang from it for prolonged periods greater than half a second with a force equal or greater than 10 pounds. Levitra will also enlarge your left ear, which you should have trimmed to size every month by your local veterinarian.... WTF! No, my eyes are not little meat DSLR cameras to go mess around with. So I don't share the enthusiasm others do. I may indeed need a surgery in the future, but I'll postpone it.
gens@programming.dev · 10 pts · 350d
Soooo, it's like a little scar that nobody will notice?
BussyGyatt@feddit.org · 7 pts · 349d
actually that's a much more apt metaphor than you seem to be comfortable admitting
altphoto@lemmy.today · 1 pts · 349d
I meant it more towards the value. Like your legs are not like a table's legs....yes both do similar things but your legs are much more singularity important to yourself than a table's legs.
tigeruppercut@lemmy.zip · 7 pts · 350d
This is the first I've heard of the eye flap healing being the issue with lasik. I always thought it was the fact that they can only take off just a bit of your lens with the lasers, and then if that continues to change shape as you age (which is common to normal aging eye issues), they can't go back and shoot more lasers because your lens has already become too thin from the earlier surgery.
WolfLink@sh.itjust.works · 3 pts · 349d
Glasses/contacts offer better vision, no risk, and an easy solution to your eyes continuing to change.
Kimjongtooill@sh.itjust.works · 17 pts · 350d
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?
altphoto@lemmy.today · 7 pts · 350d
Hmm I gotta look into that. Yup never heals.
There's a new thing where they have been able to reshape the lens by first acidifying it, then returning it to normal after massaging it into a new shape... Rabbit eyes so far, not human... Because rabbits can't scream like...like...like they were reshaping their eyeballs with acid.
oddlyqueer@lemmy.ml · 20 pts · 350d
Unfun fact: Rabbits actually can scream, I have had the misfortune of hearing it. It's not a sound you forget.
altphoto@lemmy.today · 5 pts · 350d
Oh that's terrible.
Kelp@lemmy.world · 2 pts · 349d
This reminds me of my families collective trauma, the summer of screaming bunnies!
We had our cat and her new litter of 3 kittens go out into our wooded acre property that was heavily populated by bunnies…was. Their first summer was “active”. We tried to save the first 12 or so but by the second week of July we just numbly listened to the cries while trying to eat dinner. Fun times. Miss those cats though, even if they were murder hobos
grozzle@lemmy.zip · 7 pts · 350d
when you say lens, do you mean cornea? i thought most myopia, hyperopia, and astigmatism was caused by problems with the shape of the cornea.
ok, i looked up this treatment, and it says "animal tissue tests", not "animal tests", so i suspect the rabbits are long past the point of being bothered :|
altphoto@lemmy.today · 3 pts · 350d
I think you're right.
7eter@feddit.org · 10 pts · 351d
today I learned
whosepoopisonmybutt@sh.itjust.works · 7 pts · 351d
Surely the oxygen and carbon dioxide also diffuse through the aqueus humor and surrounding sclera.
IzzyJ@lemmy.world · 4 pts · 350d
Wait, so what are the bliod vein things in the eyes if not supplying the eyes
T156@lemmy.world · 6 pts · 350d
They supply the rest of the eye. It's just the transparent bit on front that doesn't get much of anything.
individual@toast.ooo · 3 pts · 351d
thatradomguy@lemmy.world · 3 pts · 350d
how come when I don't blink it hurts and my eyes get red?
cute_noker@feddit.dk · 6 pts · 350d
Too much oxygen to the eyes.
Pazuzu@midwest.social · 6 pts · 350d
your eyes need to be both moist and oxygenated, the former usually requires blinking
REDACTED@infosec.pub · 4 pts · 350d
It means you're stoned af and forgot to blink
petrol_sniff_king@lemmy.blahaj.zone · 2 pts · 349d
Have you ever tried to breathe in a moving car?
Too much air is bad for you, dingus.
With the windows down.
thatradomguy@lemmy.world · 1 pts · 348d
ok man relax, didn't mean to offend you. just asking...
petrol_sniff_king@lemmy.blahaj.zone · 2 pts · 348d
Sorry, my pet fish wrote that. He is an extreme, anti-air radical terrorist.
InternetCitizen2@lemmy.world · 2 pts · 351d
That's crazy
Gork@sopuli.xyz · 2 pts · 351d
How does it not get damaged if we're asleep and our eyes are closed?
hancock@retrolemmy.com · 2 pts · 350d
Tear fluid also provides oxygen
toeblast96@sh.itjust.works · 1 pts · 350d
TacoButtPlug@sh.itjust.works · 1 pts · 350d
What about buttholes?
T156@lemmy.world · 12 pts · 350d
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.
Tikiporch@lemmy.world · 2 pts · 350d
I honestly did not expect this answer.
TacoButtPlug@sh.itjust.works · 1 pts · 342d
... dare I click on this link at work?
fossilesque@mander.xyz · 2 pts · 350d