Macro Pupil Constricting in Slow Motion - The Slow Mo Guys 

The magic of imagination lol

now i know, thank you

How dare you? I want to see what really happened?? A lot of things can happen in 5 seconds in 10k fps!!!

I could hear the audio, even though the video was finished. Odd.

a game changer

It really is!

It sounds like bones cracking 🤢

If it helps, they don't record audio in slow mo. Artificial sounds are added in later. So you can blame them for giving you the Heebie Jeebies lol

Moutassem Kassas that makes me feel worse. And the truth is that the eye prob does sound like that closing in slo mo

I am the 666th like

And it happens in nanoseconds

same

Well they’re not that jelly lol sensitive, yes, but not completely jelly :3 the sclera is harder than you might think!

You should see what happens when fluid is taken from the eye during an autopsy. Whole thing collapses under the pressure during extraction. Snaps back into shape afterward

@@ironprice that's really cool! I would have never thought that to be the case

Sure there were some gross looking bits in this video, but after watching I was even more amazed by the intricacy of the eye than I was before. This video also just made me think about all the complex things happening on a microscopic level that we cant see. I want to see more videos with this macro lens!

noooo. they re still beautiful! ❤

LITERALLY ME

They areeee so interesting ang beautiful

R 😂😂😂 love this comment 😘

The little crinkly sound effect they added didn't help either lmao

Haha so dang true .

Sauceddie ok

If this is looking into Dan's soul I'm afraid it looks quite dark.

Hey I never knew you would be here

Wait, are you supposed to flirt before or after you have them in your basement?

Chara Dreemur definitely before. How else are you supposed to know if they’ll fit in with the basement?

@@frog_enthusiast347 LOL!!! Oh wow that one caught me off guard. Very funny

Chara Dreemur During.

Alien ._. 😂😂😂😂😂😂😂😂😂

Have you ever seen those iris photographers? They take a super high res image of your iris and then print it out for you. It's fascinating seeing the detail in there!

SAME!!! And it's super cool seeing what it looks like in slow motion!

@@bobmcboblin yes

This is beautiful already

Geovenox mans that’s raw how many times do you get asked about it

Some different colored eyes can literally go blind.

people with lighter colored eyes could get blind if they do this lmao

ITS THE LEGEND, HES HERE

I like your channel

It is funny how these guys know so much about cameras and very little about eyes... Not a critique, just observation. Obviously quite smart about the high fps tech. It is cool to see all the minute blood vessels too!

Smarter Every Day is SloMo Guys biggest fan?

hi, i am yur subscriber (for a long time) :)

Madison Ballard Don't cry🤗

Madison Ballard...so hawt 😍😛

People who were raised with manners

Thier British so it's kinda normal for them

TheJerbol I was raised with manners, I just get excited sometimes in the thick of a conversation. I’m working on it. Called impulse control, I know.

NightHawk :lennyface:

@@teafvl ¯\_༼ •́ ͜ʖ •̀ ༽_/¯

That’s what she said!

I know what you're thinking, you should be ashamed.

With that macro lens, ice crystals forming would be possible.

or plucking a hair

@@lunatickgeo actually they've done that already... theres a video where they waxed their legs its pretty much the same thing

@@Chuzado_117 Robin! To the search bar! (Thanks!)

Just watch the intro to Dexter.

Well... now I feel totally disgusted

Creepy and gross! XD

Looked like a bumhole

Michael Hayes favorite part of the video

That my friends.. is a Vagine.

alternate name for the channel: Dan sacrifices 99% of his life for science and youtube

@@lenelikesto mostly just RU-vid and not science lmao.

Dan saw you most this episode

Oh goody

Never knew the Aztec snake god was actually just a donut

Mawnster :P

Quetzalcoatl spore limb name?

Lol first to reply I am famous

Me when I haven't eaten for an hour straight😂

sounds about right

I heard donuts 🍩

1/10

I love you

CherryCola 31 Patrick, that’s not how you’re supposed to sell chocolate.

FearedxMayhem ILOVEYOUTOO!

Because humans have normal responses to something new and biological 👁️‍🗨️🕳️👁️‍🗨️

F.B.I Federal Bureau of Investigation 👁👄👁

Sammy B Videography if it helps all the sounds are added in after (in every slow mo video actually)

@@myfatassdick I think I already know that because he say "sound EFECT"

@@myfatassdick nah, i think eyelashes that close just sound crunchy.

ItzBecky Thomas yea that is true but sorry to tell you santa isn’t real because theres a video by “smarter everyday” where they explain how all the super slow sound effects on the slow mo guys channel is added in after because the camera doesn’t have a microphone

asmr

Nym Alous it was an interesting story thank you for sharing it :)

Nobody cares

@@laysone346 No. You don't care. You can't speak for anyone else. Because I do... In a I find it fascinating sense.

@@ethangray8527 ur wrong

There isn't much of a point in saying "nobody cares" if somebody does care, it might as well be a way to say you don't care, just another way of being rude.

All I could see was a halo! ha

The timing i read this was creepily synced with the video

Achieved comedy

@@sarahinayah3060 same wtf

Nice xd

6 HUNDO

get an education.

AaronTheBlackDragon eiwiwiwiuww

Huh, new on slow mo channel?

@@PanLukash No, been with them now for two or three years, but they still manage to amaze me.

Cameron McMahon relatable

Ahahahah

Katya Zach 4 am here 🤣

1 am

Omg I looked at the clock and it was exactly 3:00

It's 1:41

(©️©️) 💧〰️💧

MY LEG!

Eyeeeeeee!

Crucial Muzic MY FACE! MY FACE! also my leg BUT MOSTLY MY FACE!

I read that in the voice of the guy from spongebob

90% on the Moist Meter

delet this

Thats what she said

Bless the rains down in Africa.

Felix wth i see you everywhere

Are you aware that your sister is a vampire? Don't be alarmed, this is totally normal.

wrrryyyyyyy...

@@saltysnowboi IT IS I DIO!!!!!

Pepper The Memer i dont get what u just described so I’ll say no until I get a better definition

@@tosinasepo1009 KONO DIO DA

Well hello there. Any updates about the track?

Fancy seeing you guys here! Keep up what you do!

BAH DUN CSHHH

keeping yourself busy while the tracks closed lol

Oh god

CryMor Gaming this needs more likes😂

get out

......stop

Oof

Goddamit

That’s what she said 10 years ago

That's what half of her said.

yourbirdcreative+ Technically, that’s what he said

yourbirdcreative 🤣🤣🤣🤣🤣🤣IM SO DIRTY MINDED

i'm so sorry you have a bad mother

Best way to describe it! Thanks

It balances out quite well

If by weird you mean wonderful than yes

He's a majestic creature that needs to be treasured and protected.

Not stupid...silly :)

Perfectly balanced

Happy Microbe the eye doesn’t have any nerves either. You could stick a needle in and not feel it, did you know that? Touch your eyeball...you won’t feel anything.

@@pommiebears that is not true lol

Niko Pipo only going by what I’ve read. What Does This Mean? It’s pretty straightforward; the retina has NO nerve endings, thus, retinal disease, including diabetic retinopathy and macular degeneration don’t hurt because…it can’t. You can’t even feel a retinal tear or retinal detachment. Many times patients relate loss of vision to pain or a certain “feeling.”

@@pommiebears Well lets say you are half right. The retina is indeed not innervated, however the cornea is. You definitely couldn't pierce your eye without feeling anything.

Niko Pipo ok...like I said, I’m going on what I read. So much for learning something new everyday lol.

I'm starting to wonder what it tastes like...

And they thought the wink was disgusting..

You'd need a telescope for that

@@HermesGO3 thats not what a telescop do. you'd need a few thousand mm lens with macro focusing

Are they brave enough to go to Dol Guldur?

@Zero Cool Yeah but a telescope is correct, but but also not because you can get lenses with adequate focal length anyway. that was my point

Sauron deez nuts

@@tamaraa4878 pretty sure they're not talking about the eye movement, they're talking about the iris moving within the eye. Nystagmus is the opposite of image stabilization.

@@tamaraa4878 no part of nystagmus is voluntary. As someone with severe nystagmus, I'd do anything to do it only voluntarily, cause the constant shaking is a nightmare at times

I think everyone, like me who also has nystagmus, should stimulate their eyes and brain to make it stop, I tried a cognitive task of writing and learning at the same time and it might be because of lack of order with the eyes and brain, you have to basically tell your brain to stop the eyes. I’ve been studying mine for my whole life. Try also natural light when in daytime with a big spacious room for best effect.

@@ciaragarrity6425 pls tell more. i also have a nystagmus, but i dont really notice it.

@@timbusta9808 All I can say is the eyes shake because of stimuli, So if theres too much going on you'll probably see the eyes move or if you can feel them move. But there's "no cure" for it. And ppl get surgery for it, however I didn't, and instead tried to stop it naturally. And if you keep up with it it might go away for a long time. So keep your eyes in the best health with natural light and shield them, and the eyes will probably improve. (You have to "shut off" the movement)

What about slowmo subject or slowmo test subject? :D

@@chiquilio then its not funny

You can already tell by all the damage he is taking. I'm surprised he didn't go blind.

Or Lab Rat

That's how I see in slow-motion

I love that idea!

Dgstowe oh

@Dgstowe one time I did it in my mouth. NOT PLEASANT

@Dgstowe heeeeeeck no lol

And the raw footage is worth money as an easy publication.

And probably taken credit for.

Humerus

Yes, but that is the volume behind the lens and the back of the eyeball. The iris is suspended in the aqueous humor.

@@DrPebis That's the bone in the upper arm. You can always claim it was just an attempt at being humorous.

John Spraggs i really need your smarts, please

Not so fun fact, there's a medical condition, when you're developing in the womb, if the blood vessels in your eye don't come away from the vitreous humerus like they're supposed to as your eyes are developing, it can result in scarring the vitreous humerus, making it hazy, which becomes a type of blindness. The condition is called Persistent Hyperplastic Primary Vitreous (PHPV). I have this condition in my left eye, and because of it, I am slowly going blind in my right eye as well (myopia). Co-ocurring conditions include glaucoma (which can result in brain damage as well), myopia, cataracts and total blindness. I'm one of the lucky ones because worst case scenario is I'll be completely blind by 30 which is in 11 years.

must see

Why...that’s so useless XD

@@jacerooker8289 and this isnt?

Kenan Elkadri I see your point XD

Jace Rooker XD

no

Just no.

How this is not top comment?

Nooo not mine, your comment is awesome, you should be top comment on the video.

I can also do this

Dear God, why must you terrifie me at night...

3:05 is better😂

IBIS = In Brain Image Stabilization

The gimbal is pretty good too!

Praise the lord.

I heard my name

@@arctani6601 I think he was talking about when Dan was vibrating his eyes and the iris was jiggling around

Um I've never heard of that. What exactly happens, and what would you expect to see? The actual eye itself somehow counters tilting??

Pirosbor If you look at something and move your head but continue to look at it you will get this affect

The best way to see that is to look at your eye in the mirror and then tilt your head from side to side. A bit like a dog does when it hears a strange sound. You will see your eyeball stabilize and try and stay level with the floor. Within limits of course.

@@seibernator im imagining a free floating eyeball travelling through your brain as you do a corkscrew

Easiest way to explain VOR is to bassically put your arm out fully and stick your thumb up. Stare at your thumb. And without losing focus of your thumb. Turn your head left and right, going quicker every so often without losing focus on your thumb. This is what VOR is. Your eyes accomodate for you heard turning and will try to keep focus on what you are looking at. They don't really rotate in such that if you angle your head 90 degress your eyes will stay in position. They do however slightly rotate, in just only a couple degrees. maybe less. You can see this yourself. Just stare at something, and without losing focus or blinking, slightly tilt your head left or right, and you'll notice your eyes stay level. Once you blink, your eyes adjust and will not be level with your focused object. I believe some people can train their eyes to tilt by using the muscles within the eyes and can do it without tilting their heads. Makes for a cool but pretty gross trick. No idea if it's true or something but haven't really tried it myself. Guessing it's sort of how people can move their ears without moving a muscle so to speak.

SCE IF Is this rdr2 referance¿ Cuz then. Yes we did

@@totte1657 indeed...

I thought this was a ring of elysium reference xD

GAVIN!!!!

Gavin! You lost weight!

That would be a good test to see how fast/slow different eye colours dialate

Would be good for testing but (from having blue eyes) I know how light sensitive blue eyes are, and they can actually get damaged easier from light then other colors. Again it’d be cool to see, but we don’t want to damage anyone’s eyes

also somebody with impaired vision, and maybe even get a close-up of both eyes in the same frame, but one eye is dilated and one fully open

i agree do more

@@samcarpenter_ I have a slight lazy eye and I noticed that when I dilate that eye, it kinda vibrates as it's dilating. My other eye is pretty much still, like in this video but my weaker eye involuntarily moves from side to side whist constricting. It was so freaky to watch

BOOH!, see you blinked there for a sec or got so dryed up eyeballs that you can't see annymore

Demonetized because it looked like something dirty when he blinked hard in front of the lense.

I actually commented this XD *TIME TO DELETE MY COMMENT*

Looks very much like a high-tech turret machine gun

And the iris sphincter looks like another sphincter

it does look like some kind of auto turret with that lens

The moment was over when those crunching sounds came in

Tsamados?

If you are looking through one right now I dont see how its gross

Yeah same lol

Its pretty gross but its fantastic and fun anyway.

What about changing focus in your eye? I wonder what that looks like! Missed opportunity.

​@@stevethea5250 You cannot see that from the outside, at least not without some really powerful light and magnification. You would have to look into the eye through the pupil, which contracts to light. One method would be to use atropin (belladonna extract) to artificially widen the pupil and peek inside. The lens itself wouldn't be too visible, because it is transparent (obviously), so the only thing to see moving would be the muscles deforming it. That movement is not really fast, so it isn't worth to use a high-speed camera for that.

Haha...:)

Well THAT is because the eye is made of soft tissue. Optical image stabilization is the eyes remaining stationary as the head turns, or in birds, keeping the head stable as their body moves (because they can't move their eyes).

@@fabiofdez yah... specially that owl video 😂

@@hellohumans175 If it was designed by him, it was designed very poorly.

Actually, the lens in your eye works with your brain so that it cancels out motion and make a stable image on the retina. That's the reason why your vision is stabilized.

Mrship ofSteam lol

Mrship ofSteam lol

Pastafarian is the answer!!!

My arms are heavy, knees weak palms are sweaty, I vomit on my sweater already, eye spaghetti.

Dumb Videos *-how do you italicize?-*

Walrus BFV _

How do you make a line across words

_hello_

@@SexyP123 u have to put - in front of a word and at the end but like line it up like -hello-

Not in super slo mo

Slit lamp exam

Yeah, it would be cool to use proper equipment rather than this weak camera, I mean, using a high speed lamp in a "slit lamp" which is what we optometrists use, and ophthalmologists too, and for me it's a standard in ocular health

ophthalmologists....

Kid thats not a eye dr. Its called an ophthalmologist

SlavjanA But the headlights are more important when deciding if you'll be good at procreation.

just watching this video made my eyes water insanely 😰😰

Yeah, that was freaky

The sound too it was hilarious

Yeah, when Dan squints, her REALLY SQUINTS!

@@snaake9389 sound isn't real on slow motion videos more than 300 fps or so

timtrainage EWWWWW

Michael Hawthorne and all delivered by some top blokes 👍🏻👍🏻 would love to have a beer with them.

Get Schwifty *dank

What about changing focus in your eye? I wonder what that looks like! Missed opportunity.

get life

@@stevethea5250 it wouldn't look like anything. The focusing thing happens inside that black of the eye!

Ben Saltz I agree

Yes. It's what makes Smarter Every Day such an enjoyable channel to watch. His recent schlieren videos are some of the best RU-vid content I've ever seen

Maybe not with every video, but it definitely would be amazing to see an ophthalmologist/optometrist/etc talk about whats happening here.

Even as a bonus or follow-up video, yeah that would be interesting

This is why I think video responses should still be a thing.

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