Macro Pupil Constricting in Slow Motion – The Slow Mo Guys

Macro Pupil Constricting in Slow Motion – The Slow Mo Guys

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

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63 Responses

  1. Fionn Burrows says:

    You should do axe and knife throwing slow motion and explain the physics of it if you can!

  2. Mr.E says:

    Doctors would probably not recommend shining that bright light straight into one’s eyes, but this is gave and dan we are talking about…

    • Jessica Blackwood says:

      Actually many lights that are used by Dr’s are brighter than this light… It is the UVA and UVB rays that can cause damage not just straight light…

    • P͠0̴l̶̡̛l̨ùte̕͟d̴͢M̨͠ist says:

      +Jessica Blackwood So how would you know if it was damaging or not? asking because I did this accidentally recently with my phone’s flash

    • tom selier says:

      You’d need light on the scale of the sun to do damage, luckily this LED isn’t close to that 😀

      But you are correct, you need to be carefull with your eyes. They are very sensitive and are known for poor healing after a certain amount of damage. Plus you need both of them

    • P͠0̴l̶̡̛l̨ùte̕͟d̴͢M̨͠ist says:

      +tom selier I looked at the sunset a couple (4-5) times over the summer, I never looked more than 2/3rds of a second, it was just my curiosity got the better of me. I imagine I caused some damage

  3. KuraIthys says:

    nothing like shoving a gun barrel directly into your eye…
    Yes, yes. It’s a camera lens. But still. Just look at it. XD

  4. Faffy Waffle says:

    Dan twerking his eye-booty

  5. joseph jackson says:

    Anyone else’s eyes water at the beginning? 1:25

  6. Riley Cammack says:

    You should put like a back massager against your head near your eye and see what that looks like.

  7. Bartholomew Dan says:

    Press F for Dan’s vision

  8. deafwing says:

    ?There are other slow mo probing uses for this lens ?.

  9. SCE IF says:

    Guys, we found GAVIN!

  10. Hapsen says:

    Well now i kinda want to watch everything up close, on with that fellas 😛

  11. Ben's Channel 2004 says:

    Do a toad eating a bug in slow mo

  12. William Wesemann says:

    pluck out eyelashes in macro

  13. Hei Yiu Wong says:

    I’ll never see my eyes the same way…

    Oh wait I can’t see my eyes 🙂

  14. Nym Alous says:

    My youngest sister had her eye scratched when she was really little (like 5 years old or so). It was a long, jagged, diagonal scratch across her cornea (the clear lens on your eye). We took her to our eye doctor (he’s incredibly good) and he took a close-up picture of the scratched eye. Then he prescribed a special antibiotic lotion that we had to put in her eye (it was specifically an eye lotion). After a week, we took her back in to get her checked out. He took another close-up picture of her eye. I was able to see the before and after pictures, was able to see that the scratch had healed completely, and had a brief conversation about why the scratch was dangerous: it can get infected.
    Jagged wounds in the cornea can allow bacteria to take hold and start to eat at the rest of the lens, which is why it was important to use the special antibiotic lotion. The lotion itself also lubricated her cornea to prevent the wound from being torn open further by the action of her blinking eyelid.
    The reason I’m even sharing this story is because it was the last time I saw an eye up close and magnified.

  15. Yiannis Koutsoftides says:

    you should’ve tilted your head and capture the Vestibulo-ocular reflex, when the eye basically maintains its orientation to keep the image stable, pretty cool plus its the fastest reflex in our body!

    • Pirosbor says:

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

    • KRYPTO Fortnite says:

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

    • seibernator says:

      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.

    • Stand Tall says:

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

  16. Ben Banks says:

    The camera looks like some sort of weapon

  17. Jeremy Kean says:

    Those cool little craters in your iris are called Crypts of Fuchs. They let the deeper part of your iris enjoy the clear goop above them.

  18. IReist says:

    how many fingers am I holding up?

    “One donut”

  19. Crucial Muzic says:

    My eyes won’t stop watering…

    *…MY EYES…*

  20. AaronTheBlackDragon says:

    This is funny and breathtaking at the same time.

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