Macro Pupil Constricting in Slow Motion - The Slow Mo Guys

  • Published on Jan 15, 2019
  • British people are not known for great eye contact, but Gav steps up his game by looking deeply into Dan's eyes... From about 2 millimeters away to find out how quickly a pupil constricts.
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    The Speed of Pupil Dilation - The Slow Mo Guys
    Filmed at 1000fps and 500fps with a Phantom Flex 4K
  • EntertainmentEntertainment

Comments • 4 962

  • uciz syahreza
    uciz syahreza 4 days ago

    Nikmat tuhan manakah yv kalian dustakan QS. Ar rahman

  • SheNoob
    SheNoob 4 days ago

    I have a strong stomach, but for some reason, this video made me really queasy

  • Mahesh soni
    Mahesh soni 7 days ago

    That's amazing.

  • Cyro R. Júnior
    Cyro R. Júnior 7 days ago

    What about a video with the reaction of blind people and other deseases?!

  • Matthew Ingram
    Matthew Ingram 7 days ago

    Now take LSD.

  • Patricia Lynn
    Patricia Lynn 8 days ago

    This was a great one!

  • Pin-Wu Yu
    Pin-Wu Yu 8 days ago

    in the name of science, we salute Dan!!!

  • Hunter Vogl
    Hunter Vogl 8 days ago

    That is so weird and gross

  • Pyro Potato
    Pyro Potato 8 days ago

    They should film a Newton’s cradle

  • Atanu Biswas
    Atanu Biswas 8 days ago

    What a creations of mother nature..❤️😍👌

  • KaitoMarmota
    KaitoMarmota 10 days ago

    I was expecting gav to do this one lol

    MI MIYYU 10 days ago

    Indonesia hadir:V

  • jonas lymann
    jonas lymann 11 days ago


  • jonas lymann
    jonas lymann 11 days ago


  • Maha maha
    Maha maha 11 days ago

    You guys are amazing. Love this. Knowledge is power. Knowledge is realization. Some morons gave thumbs down...

  • mohamed jamal
    mohamed jamal 12 days ago

    if you get more closer the focus will be better. good luck next try!

  • Harry Marshall
    Harry Marshall 13 days ago

    So I've discovered I get very uneasy, almost nausious when up close to another eye like that it. It makes me feel like it's happening to me and that any time my eye is going to get poked...

  • Anthony Canale
    Anthony Canale 14 days ago

    Dans eyelashes made a crisp effect noise in slow-mo. That's totally Grimm! Lol

    RAVISH KUMAR 15 days ago +1

    4:55 best visualisation of eye accommodation 👌

  • Cross Stitch Bitch
    Cross Stitch Bitch 16 days ago

    If you think about it, no one has ever seen Dan’s eye like that before, because obv in the dark you can’t see his eye...pretty mad.

  • Neeewer
    Neeewer 17 days ago

    Can you guys do FIREWORKS UNDER ICE in slow mo !!

  • Uday Kiran
    Uday Kiran 18 days ago

    one of the ugliest things I've seen up close with laowa 24 mm probe lens

  • Trash .Boat
    Trash .Boat 18 days ago

    "how many fingers am i holding up?"
    "a donut"

  • ItzKat
    ItzKat 19 days ago

    I am now wondering what the eye looks like witg an eye-glasses user

  • Horizon Gamers
    Horizon Gamers 19 days ago

    7:15 this is an eye screen stabilizer

  • jhepoy
    jhepoy 21 day ago

    2:21 OUH!
    that sounded like steve from minecraft

  • Anita Gofradump
    Anita Gofradump 22 days ago

    2:44 All i can see is a pink donut!
    Hey! Its lightish red!

  • Fun with Ra.1
    Fun with Ra.1 23 days ago +1

    Do one video of stabbing him with knife in his throat and lets see how it looks in slomo...

  • J7 Squad
    J7 Squad 23 days ago

    3:40 WoW !!!! Just WoW

  • Anzil alimon
    Anzil alimon 24 days ago

    Why always Dan?

  • Abdullah Kha N
    Abdullah Kha N 24 days ago +1

    Gavin free
    Gavin cheap
    Gavin expensive

  • Venomorph
    Venomorph 24 days ago

    its easyer to keep the targeted eye open if u have ur both eyes opened while doing it xD just saying

  • RazGrriZz
    RazGrriZz 25 days ago

    La illaha Illallah

  • GippyHappy
    GippyHappy 26 days ago +1

    Dan just called his own eye disgusting

  • # Bivuti.V. ideas
    # Bivuti.V. ideas 26 days ago

    Why don't you both change ur dress..

  • Artificial Idiot
    Artificial Idiot 28 days ago

    So if the eye cannot handle too much light even if the iris is constricted, the eye sends order to close the eye.

  • Jaws Jaws Jaws
    Jaws Jaws Jaws 29 days ago

    we have diamond shapes in our eyes thats pretty cool

  • Jaws Jaws Jaws
    Jaws Jaws Jaws 29 days ago

    wow the accent for when you said 'Garage"" although us Americans came second

  • Rodrigo Guzmán
    Rodrigo Guzmán Month ago

    The holes in the iris are called lacunas and show damage to organs and different parts of the body. He also has deposits of sulfur darkening the natural colour of his eyes.

  • Chaitanya Bhardwaj
    Chaitanya Bhardwaj Month ago +1

    This is insanely amazing, makes me wonder why TVclip doesn't have a "WOW 😮" reaction, like facebook

  • Will Pack
    Will Pack Month ago

    Please use an audio normalizer on the video before posting. Some parts are louder than others.

  • Koba Agario
    Koba Agario Month ago


  • Thakur Arun singh
    Thakur Arun singh Month ago

    How many of you had tears in eyes while watching this?

  • Jimin’s Jams
    Jimin’s Jams Month ago

    1:54 omg why did I think you tied him to the chair

  • Jason P.
    Jason P. Month ago

    This is awesome

  • Misu Satriyo
    Misu Satriyo Month ago

    Why is this makes me feel weirdly philosophical?

  • James Oscar
    James Oscar Month ago

    Why 1k dislikes?

  • LordWaluigi
    LordWaluigi Month ago

    how are there no comments at all

  • Rambo VXl
    Rambo VXl Month ago

    anyone else get the creeps at 3:35 with that blink

  • poostiu
    poostiu Month ago

    Hi guys. Your videos are awesome. Since u have experience with the eye, human and birds ( awesome video ) , can u please try out also with cats? ( different angles and light shades) . Even if you won't, it's still amazing to se the world trough your eyes.

  • preben ølkær
    preben ølkær Month ago

    I love you two more than Planet slow :)

  • Rajeev Santhosh
    Rajeev Santhosh Month ago

    GAV :- I can get pretty close to your ball
    DAN :- My EYE - ball!😂😂😂😂

  • dyslexius maximus
    dyslexius maximus Month ago +1

    i woke up this morning and had no idea that by night id be amazed by eye jiggle. we live in a fascinating time.

  • macro kaphta
    macro kaphta Month ago

    You should taken someone with blue hair

  • Dawn Byington
    Dawn Byington Month ago +1

    doing this to your eye could damage it permanently

  • Piano
    Piano Month ago

    Oh God❤️

  • Str33tfalcon
    Str33tfalcon Month ago

    Most fascinating Videos!

  • SultanRind Gamer
    SultanRind Gamer Month ago

    Try it with cat eye

  • William Colley
    William Colley Month ago

    It was world book day the other day. My kids dressed up for school. One went as the giant from the BFG. My wife, who is very talented, made dreams in a jar out of coloured water and glitter. Looks awesome. Better in macro slow motion.....

  • Simon Trembluk
    Simon Trembluk Month ago

    I’d love to see a bubble freezing in slo mo.

  • Walt of All Trades
    Walt of All Trades Month ago

    - "How many fingers am I holding up?"
    - "One donut."
    Priceless! 😆

  • Mike McCoy
    Mike McCoy Month ago

    This was awesome! So cool how gelatinous it is.

  • sunsh4de
    sunsh4de Month ago +1

    You two at 3:43 made me lol so much haha

  • Bianca Duncan quiltAquilt

    Do one looking in the ear like doctors do.

  • Lawrenzo Green
    Lawrenzo Green Month ago

    You both have beautiful eyes.

  • Rickn Moorte
    Rickn Moorte Month ago


  • Nerd
    Nerd Month ago

    You guys are great, but shave the neck beard brah! keep the beard just not the stuff on the neck XD

  • naveen suthar
    naveen suthar Month ago

    Doctors should use this technique.

  • Elani Arkady
    Elani Arkady Month ago

    That was fabulous and creepy.

  • Kenneth Parao
    Kenneth Parao Month ago

    Make a slomo of bloodshot eyes

  • ReadyTo GunYouDown
    ReadyTo GunYouDown Month ago

    And this all came from that bigbang 😅what a joke

    EDITOR K Month ago


  • weird billy
    weird billy Month ago

    Who else got dizzy af lookimg at that light... i couldnt finish the video

  • Sonia  Collazo
    Sonia Collazo Month ago

    I love it, amazing view, like nebulas....😚😚

  • 383mazda
    383mazda Month ago

    Galileo approves this video

  • Tobi #1
    Tobi #1 Month ago

    Use blue eyes

  • Katherine Koning
    Katherine Koning Month ago

    You have beautiful eyes

  • Mohammed Zamam
    Mohammed Zamam Month ago

    ☝️ Allahu Akbar

  • Khan Salman
    Khan Salman Month ago

    Look at the GODs creation Subhanallah ☺️ ❤️❤️

  • Mohit Sharma
    Mohit Sharma Month ago


  • Shail Pradhan
    Shail Pradhan Month ago

    Yo bro The Eye Guy Looks Like sal Valcano

  • Simon Ellis
    Simon Ellis Month ago

    Can you guys pleeeeeeease release a mega cut off all your slo-mo footage with your awesome soundtrack??? Would watch it for dayzzzzzzz

  • El cat
    El cat Month ago +1

    Mom, we are humans..
    Omg we are humans.
    WE. ARE. HUMANS!!!!!! Bless us all. 1 thing we all have in common. Literally every single comment, and view on this human. 🙏 i have that in common with u all :") that's cool.

  • El cat
    El cat Month ago +1

    Mom, we are humans..
    Omg we are humans.
    WE. ARE. HUMANS!!!!!! Bless us all. 1 thing we all have in common. Literally every single comment, and view on this human. 🙏 i have that in common with u all :") that's cool.

  • Jhon Murillo
    Jhon Murillo Month ago

    1:26 and 4:21

  • Jhon Murillo
    Jhon Murillo Month ago


  • kashan khan
    kashan khan Month ago

    la hawla wala quwwata😘

  • Jacob Tabor
    Jacob Tabor Month ago

    People who are uncomfortable with making eye contact beware

  • Nubie Heroes
    Nubie Heroes Month ago

    The Real OIS

  • Neely Witham
    Neely Witham Month ago

    I laughed so hard at the close-up blinking eyelid part! That looked so gross. lol Very cool video, thanks!

  • choclate girle
    choclate girle Month ago

    سبحااان الله
    Sbhan ALLAH the creator

  • Daniel Aguilera
    Daniel Aguilera Month ago

    7:13 fat but

  • HourlongCobra52
    HourlongCobra52 Month ago

    I "SEE" what you did😂😂😂😂

  • Raul Lizarraga
    Raul Lizarraga Month ago

    Macro lenses vs Grape in microwave. Please.

    RUDE GAMER-/ Month ago

    7:12 aqueous humour

  • JusT StorMz
    JusT StorMz Month ago

    That was so cool to watch the iris open and close in 1000 FPS

  • ImmortalBucket
    ImmortalBucket Month ago

    Dans eyes are a pretty color.

  • SaphireLuna
    SaphireLuna Month ago +1

    This has changed my whole perspective on eyes.

  • Slayer-7 7
    Slayer-7 7 Month ago

    Our life is weird & awesome at the same time

  • Sheikh Nafiun Noor
    Sheikh Nafiun Noor Month ago +4