What Are Eyeballs Made Of?
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- Опубликовано: 6 сен 2024
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Eyeballs are unique organs, providing many animals with the ability to interpret the light waves in the world around them, but what are these squishy parts made of?
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About the breathing part... Do contact lenses block the breathing of eyeballs?
@Nekroses Modern contact lenses are mostly permeable to moisture and gases. Back in the early days of contact lens, they were not, most were not very flexible even, they often led to injuries and infection and could not be worn for more than 4 hours.
Even though modern lenses are permeable they have to be removed and cleaned daily since bacteria and dust can settle on them. In bad cases, the bacteria festers between the lens and the cornea and it can damage it so much you go blind.
I hope my answer helped you!
Thanks for the answer @Krommandant.
Slight correction: "You wouldn't want red stuff getting in the way of you seeing things" -- it's not ideal, but we do actually see through blood, as the light detecting cones and rods of the retina actually sit -behind- their own blood supply. There are plenty other animals though that have the blood supply behind the retina, which delivers much more sensitive eyesight than the retina-behind-the-blood model we have :-)
Homework: how big would your eyeballs have to be in order to allow breathing underwater? *lol*
Hey why do our lips stick together?
For anyone else who wondered “but how do they breathe when you’re asleep!” I googled it - “At night, the tear film remains intact and is continuously replenished. The inner aspect of your eyelids, called the palpebral conjunctiva, are highly vascularized, with capillaries just below the surface (and accessory tear ducts and tiny mucosal glands to keep it moist).
When you sleep, oxygen (and nutrients) diffuses from the palpebral conjunctival capillaries through the tear film to your cornea.” I’m guessing this is one of the reasons why you can’t wear contact lenses when you sleep!
Science with Katie Thank you smart person
This doesn't happen to me, I don't have eyes.
Science with Katie uuuh who didnt know?
Awesome!!! Thanks for telling us :)
Thank you! I was wondering how your cornea would be supplied by O2 if you were in an atmosphere deficient with O2 but still had a self contained breathing apparatus
"Your eyeball... breathes"
Plz make a video on pupil shape. Why do small cats have vertical slits whereas big ones don't and why goats have horizontal ones...
edi it’s called GENES.... go back to school you damn drop out.
Gold Wolf and you got obviously troll genes, since you purposefully misinterprete my question giving you a pretext to insult me...
Having a bad day?
_AlexD_ Wrong! You *partially* answered why the genes that make the phenotype pass on. I *concisely* answered the original question: why they are. So... SALTY on your dumb ass lol!!!! But I’ll give you partial credit because what you said is important to why the genes get selected to be passed on... even though it didn’t answer the question lol!!!
Davima1 actually, I’m having a wonderful day schooling dumb asses lol... I love to teach!
I was playing a VR video game, but the depth perception setting was giving me nausea, so I downloaded the eye patch.
Hah!
hats off to tiy
Are you proud of yourself?
This has so many layers...
+Master Therion
Have you tried the new iBalls from Apple yet? ;-)
my eyes are made out of pure muscle!
What the hell are you!?
YOU'RE made out of pure muscle. I see u in every video lol
Muscle Hank stop commenting
Muscle Hank I think you already used this one but I am not sure.
EYES ARE FOR THE WEAK!!!
i had muscle surgery on my right eye a month ago (due to sixth nerve palsy) and was shocked that i barely felt any pain when i woke up, only soreness like a headache for the next few days. the worst part was the tiny little stitches. they were extremely irritating when my eye was closed and have only just recently completely dissolved. basically eyeballs are strange, terrifying things and they bounce back to their normal self very quickly which i am thankful for
another thing, the aqueous humor always renew itself, it's produced by the ciliary bodies that control the lens and excreted throw Schlemm's canal at the angle of the cornea
it also contain dissolved gas and nutritients and it supplies the cornea and other inner structures from the inside)
I dissected a cow eye twice in my school years and I learned more in this video then I did back then. I hope you guys do a video on the lens and the muscles that move it sometime soon.
i had LASIK yesterday. i can read stuff thats more than 2 feet away! without glasses!
Congrats! How's your night vision?
Petrino Did it hurt??
I had LASIK. Now I can’t read anything closer than 3 feet away without glasses.
only for the first day. some burns, and you have to do eyedrops 6 times a day for a week.
I had LASIK last september. It hurt like hell for a few hours, I took some painkilers and slept. 3 hours later pain was gone. My eyes were bloody for a month but now I see everything clearly. A week ago they gave me a new glasses because I wanted it (it's 0,50-0,75 compared to the old one: 4,50-4,75) I'll use it mostly when driving but I can live without glasses! Can't wait to be able to wear sunglasses on beach, I've been wearing glasses for 18 years.
"How Can Mirrors Be Real If Our Eyes Aren't Real" -Jaden Smith
Um, what ?
'Scuse me, but that phrase, makes no sense, whatsoever...
From a plain objective, physical viewpoint:
Mirrors are far more likely, to occur randomly, like ice reflecting something;
than there is, for there to be eyes rolling all over...
Although, the paths of evolution, does tell us, that eyes are useful;
there's always going to be, more reflective surfaces, than eyes. /thread
Besides, us having eyes or not, does not matter for mirrors;
they'd form naturally anyway, though admittedly, we'd have no use for them.
Though, it's not as if mirrors have feelings anyway, since they're inanimate.
This is probably, the silliest, and the most uneducated quote, I've ever seen...
SpaceCakeism Well, that's Jaden Smith for ya, silly and uneducated. That dude is seriously loony
That boy ain't right.
I don't even......
Somehow I think without trying you have made the creepiest sci show episode so far
Thinking about the inner bits of eyes and looking at them like they're dissected *shudder*
We dissected cow eyeballs in high school. Weird but cool.
I've also dissected a cow's eye in school, and it was one of the most disgusting and uncomfortable things I've ever done. Maybe because I have this eye thing where I may faint when someone or something touches my eyes (my optician told me that it's the same reaction as for people who faint by seeing blood), and I kind of felt like it hurt in my eyes when I used the instruments on the cow's eye.
I wish I could show you pictures in the comments. Years ago there was an industrial accident that left my eyeball with a severely lacerated cornea and a prolapsed Iris. It took 57 stitches to put my cornea back together. Multiple surgeries included an intraocular lens and a corneal transplant and a retinal detachment. About $200,000 later I have an eye that functions to 20/30 corrected and an iris that does not work. When the iris was destroyed I was left with this huge gaping hole that let in so much light that it was painful to open my eye during the day. The eventually sewed part of my Iris shut but now I am left with two irises that wash the light coming into my eye. It's really hard to explain, but the light coming into my eye through the two irises refracts in such a way that I see light splays in a V pattern. When people ask what I see through this eye, I have to try to explain that it's almost like looking through a clear Saran Wrap that is not pulled tight.
I have adapted really well to my injury as far as to hold a CDL to drive a truck. Also the vision is getting a little worse year-by-year, I am confident that I could get a federal waiver so I can still drive.
If you look up into the blue sky long enough, and with enough attention, you should be able to see tiny blue-white dots flashing around the sky.The phenomenon was so well-known that it acquired the nickname "blue-sky sprites," but they're actually white blood cells moving through your eye.
It's not white blood cells, as the video explained, there is no blood, inside the eye. It's globs of collagen fibers that float in the clear gel inside the eyeball, passing over your retina and casting a shadow on it. They're called "eye floaters"
They are made of eyeball meat
Crazyfireball 808 Eyeballium, element 13,9
If meatballs made of meat, eyeballs make of eye
Facts
I just realized eyeballs really freak me out. Not the idea of them being filled with goo, but the idea of having that goo pierced by a freaking needle like a scene in House M.D. that really freaks me out beyond belief xD
That's a fun fact to know - that eyes breathe
I like animals especially birds. There are goldfinch bird lovers here
Anyone else feel delicate after watching anatomy videos?
I'm loving this channel. It always answers my questions before I even think about them.
A real man can't make tears.
Real man here. What are tears?
Real men make orginal jokes So theirs no more real men
WHY ARE THERE SO MANY HANKS
"Honey why are you crying?"
"I'm not crying! I'm just....feeding my corneas."
Do a video about what the actual lense in your eye is made of. Is it a rocklike thing made of minerals? How hard is it? Does it grow? Do eyeballs grow?
as always great episode :D will you make one about programming thermostats in badly insulated, cold houses please?
All my fav youtubers are plugging square space. You do the most interesting and thorough job of it.
I have a lot of floaters, can't see them in dark areas of course but looking at a clear sky it's pretty annoying.
I saw a really cool slow-mo video (I think on RUclips) a while back that showed a person moving their eyeballs around, and the cornea actually jiggled around every time they stopped.
I have had a procedure performed on my eye called "vitrectomy". It was to replace my vitreous fluid because I had an extreme case of "floaters". The floaters were most likely caused by an inflammation called "Uveitis Fuschs", and that inflammation might have been caused by an injury. The inflammation might come back because it's "sort of" active, but I won't again have the floater issue thanks to the vitrectomy. I still have a few leftover floaters, but it's like 1% compared to what it was.
If anyone is wondering about the procedure: it's a daily hospital visit with an overnight stay, and the recovery from the procedure takes about 2 weeks to a month if there are no complications.
Edit: It's also kind of gross to be aware while the doctor is poking in your eye, but I opted for a local anesthesia because I wondered how it felt :)
Milos Kaurin I had muscle surgery last month because I’d been struggling with horrible double vision due to sixth nerve palsy for about 2 years. I was lucky enough to be completely asleep for the surgery and surprisingly didn’t have any pain when I woke up. Eyeballs are so strange lol
I can't unsee our eyes as little cordial cherries in our heads now, thanks Hank
The way the cornea piggybacks off of your tears makes me think about some of the things possible in factorio, where a production thing can piggyback off of the production from another part of your production line
Well, you can guess who doesn't have any water in his eyeballs.
THIS IS THE 3RD HANK IVE SEEN SO FAR
Cadence McDaniel I am sorry if this disapoints you but there are actually five of us (so far).
Fire Hank ok lol
Trivia: Japan is among the primaries countries that consume Tuna Eyeballs as a tasty, nutrient delicacy.
The eyeball of a Tuna can fit a hand and is fairly cheap, you can buy a pair for a very low price.
He just made eyeballs sound appetizing
Aqueous humor and Vitreous humor are there basically to provide a denser medium for licht to travel through and to bend decreasing the focal length. So it actually decreases the possible eye size. If vitreous humor were not there our eyeballs would be the size of "Grey Aliens"!
My eyes breath? Time to superglue my mouth and nose shut and take on my true method of breathing.
Glorval MacGlorvas Ah yes the truest
No, your eyes BREATHE, with an E on the end. Why do so many people get this one WRONG?
"Eyeballs...are weird."-Hank Green 2018. Love the episode scishow!
Dont over simplify,
Its is made of cubiodal epithelium and the the hyaluronic acid(monosaccharide) is just its basement membrane's second layer constituent and collagen fibre is basement membrane's 1st layer constituent. And the nervers are present on the basal layer of epithelium
This helped me a lot for my biology studies,Thanks for making this video
I used to think there was an empty cavity inside the eye behind the pupil, which was basically a hole.
I used to be scared that, when it was snowing, a snowflake would enter my pupil and hit the optical nerve.
Oh, kids...
To be fair, on the drawings, it's often portrayed like the transparent parts are insubstantial.
Isnt it amazing how evolution and pure chance created something as complex as the human eye and brain
2.5 billion years is plenty of time for trial and error.
The lens isn't hard and glass-like. It can be compressed so that it can focus properly on near and far things.
"Are you crying AGAIN?"
"I'm helping my eyeballs breathe!"
QQ: So why does your body try to force your eyelid closed if you get a scratch on your eye? I want the full, animated explanation you guys do so well!
I love how I feel totally content with my life, and then I see a SciShow thumbnail and I’m like “I need to know that. How have I not wondered that more aggressively? I won’t be able to go on until I know!”
+SciShow I'm pretty sure that the lens in the human eye is neither hard nor glass-like. It's soft and squishy because it LITERALLY CHANGES SHAPE to alter the focal length of the eye.
I M Ofage The iris changes shape. The lens is rigid. It can't move, because it's just cells without nuclei and organelles, filled with crystalline.
+Hlias K Wikipedia says the lens changes shape, which matches what I've heard about cow eye lenses (those bounces like a rubber ball) and what I remember from Biology 12 (which was exclusively devoted to human anatomy when I took it).
"The lens, by changing shape, functions to change the focal distance of the eye so that it can focus on objects at various distances, thus allowing a sharp real image of the object of interest to be formed on the retina."
- en.wikipedia.org/wiki/Lens_(anatomy)
I wish we still named stuff like we did before modern science.
Calling bodily fluids “humours” sounds so much neater than “aqueous solution made of urea, water and bodily wastes”
The cornea has much more important function that just letting the light in. The cornea does about 70% of the refraction of light and many problems (requiring glasses and lenses) are due to problems with the shape of the cornea
I actually did not know that about the travel of oxygen to the cells; it never crossed my mind about the logistics. Huh, well damn. Good to know.
Make a video about trichotillomania. It would inform lots of people
Oh my god, eyeballs sound DELICIOUS. SciShow what have you done to me!?
What are eyeballs made out of? Eye didn't know until eye saw this video.
binky2819 No
binky2819 Eye see what you did there!
eye couldn't see this coming!
Eyeeee good pun!
Eye hate you all
I’m EXTREMELY aware of my eyeballs now...
I’ve taken a&p and have assisted in quite a few eye surgeries being a Certified Veterinary Technician and I still just call the eye a jelly ball lol!
Your eyeball breathes.
- Hank Green, circa 2018.
Ever since I was about 5-8 years old I would see this specific shape or dots or things in my vision, but only when I’m not focusing on anything, and it would be in a clear place with solid color, ex. Clear sky or fresh snow, when I try and look at it, it moves the same, it doesn’t harm my vision it just has always been there and I never knew if anyone had the same thing, until now. Floaters,
Squarespace: taking over the Internet, one RUclips video at a time.
This is useful because I'm learning about the human eye in Biology class now, but I know most of this already
let me tell you, dissecting that cow eye in high school was a *trip*
Did Angry Old Hank die?
He died of old age
He was pretty old so
Muscle Hank would exclaim "death is for the weak!"
Halfway through this in bio. Thanks guys! 👍🏼
I would like to know why do humans like music so much? It can change our mood and help us remember things that happened in the past. So where did it all start, and are there other animals that use music or sounds for enjoyment?
Make an episode about why faint goats faint
gumelini1 i though faint goat didnt faint... my mind transcended!
Poop Master they do,its funny as hell
So thats why animals like eating eyeballs, they are sweet.
I smiled so hard when he told me my eyeballs breathe
Hank is by far the best host
Thank You! I have a test on the eye on thursday :)
I love these videos so much, so glad I subscribed a while back!
Plot twist- since our eyes breathe our eye twitches are actually little eye sneezes
HAHAHAHAHA!
So let me get this straight. Late at night when it's dark and completely silent, the sounds of heavy breathing that I hear are actually my eyeballs breathing? Oh whew thank goodness, I thought it was the creepy stalker guy outside my window again!
Your eyeball BREATHES !!!
I always thought that eyeballs were made of the same thing frog skin was made off of.
What an intelligent design!
Wow. Now I found out why eyeballs tasted to sweet.
That explains why my eyes get watery a lot....
*IT'S TRYING TO BREATHE*
cells, BAM NEXT VIDEO
I'd love to see a video on how lasik works. Like how does shooting lasers at someone's eye fix their incorrect vision? Like what does it burn or damage that is capable of fixing vision
It shaves the surface of the lens behind the cornea to redirect how light is focused to the back of the eye.
Damnit Sci Show... If only you had uploaded this last week before my bio exam 😩😩😩
Thank you so much for not showing the black and white video of a woman having her eye cut open
Thanks, Hank. I felt really bad when I used a lumber axe to kill my noisy 5 neighbors next door, and then ate their eyeballs just to try it. Now I know it felt good because of the sugar, and I ALSO know the reason I keep doing it to my new neighbors is because the sugar added to the positive reinforcement system in my brain.
38 and counting! Thanks again!
1:18 Umm.. *that's not how light-focusing works*
My science teacher uses theys videos in class and it makes school 200% better
I will never look at my eyes the same way again!
keep it up hank and jon i have lewarned soo much from you dudes really thank you
...gas disolved in your tears.. I didn't know eyes were so metal
We cut open a cow eye in science. It was really fun.
“Your eyeball breathes”
Hank Green 2018
Well... that was really interesting!
Theres also ciliary muscles in the eye, and the data gets to you as electrical impulses through the optic nerve
Idk why i remember this from school
And if the aqueous humor that he talked about builds up too much without being drained, it causes pressure on those optic nerves and you have glaucoma and lose your peripheral vision and slowly go blind.
sorry to sound like a downer, but I love ophthalmology :)
make a vid explaining lasik, especially the second procedure where they laser the cornea
*your eyeball*
*_BREATHES_*
Ah so this is why my Optometrist recommended I always remove my contacts at night even though they're gas permeable!
“Behind the iris is the lens, a glass like structure.” Does that not call for further information?!
Our school had to remove the jelly and the lens from the eyeballs because everyone was getting sick from eating them at lunch, why is that? Do eyes provide nutritional value?
So my eyes are made out of the inside of a Cadbury Egg?
So, thats why those crows tried to eat my eyeballs...to get the sweet, sweet eyeball juice...
My mother has to blown retinas. One eye sees like a broken mirror and the other eye sees with a purple haze. This woman is 84 years old and is still driving! She bought a new car and within less than a year she hit the house with it and then she totaled it in a car accident it was her fault. So she headed over to the car dealership and laid cash for another car! While I heard disabled daughter sit one street away with Transportation only from a caregiver.
Do one on where tears come from, the whole science behind it?
My eye is basically a fish.
"Sweet gooey collagen"
.....So... Unflavored Jello?
*_E Y E B A L L J E L L O_*
I found this vitreous humorous. :D