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.
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?
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.
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.
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?
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.
Unfun fact: Rabbits actually can scream, I have had the misfortune of hearing it. It’s not a sound you forget.
Oh that’s terrible.
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 :|
I think you’re right.
Wait, so what are the bliod vein things in the eyes if not supplying the eyes
They supply the rest of the eye. It’s just the transparent bit on front that doesn’t get much of anything.
how come when I don’t blink it hurts and my eyes get red?
your eyes need to be both moist and oxygenated, the former usually requires blinking
It means you’re stoned af and forgot to blink
Too much oxygen to the eyes.
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.
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!
heavy breathing
Quit using up all the oxygen.
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.
What? Why would the immune system attack the eyes?
As someone living with an eye injury, this is a deep seated fear.
Well that’s just terrifying
It’ll do the same to a man’s balls, too
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
New phobia unlocked
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
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.
Forever?
Yup!
Bet you didn’t see that coming
E is for eye A is for are Y is for you
Eayyyyyyy
Oh damn, did not know that was a risk
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).
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.
They’re just full of shit.
10% of our regular oxygen intake is through the skin.
Source?
Some biology science magazine years ago. Googling gives mixed results. At least the upper skin cells do breathe directly.
Mostly ocean flora but there’s a lot that comes from the Amazon rainforest too.
today I learned
