Eye Movement Terminology

An introduction to correct terminology of ocular motility (medical). Get my new (May 2013) interactive book on your iPad, itun.es/i6xT3Yf

[@tom_something]

"We need to invent medical terms for the things eyes do." "Should we give them very similar sounding names so they are easily confused with one another?" "Well, obviously."

[@MMM2345DDD]

I, too, hear it correctly. Proper terms are used for eye movements in this video. It might be helpful to have these terms displayed on the video screen as you speak, especially

[@kavithamk9155]

But I couldn't get intorsion and extorsion... Inspite of trying several times

[@hannijr6120]

Kavitha M K uhhhh me too, i feel like such a idiot...

[@fanofideal6458]

Same...it shows it moves like a wheel clockwise and anticlockwise but my question is when we did this movement

[@user-ek7cy2lx2t]

@@fanofideal6458 s3.amazonaws.com/classconnection/787/flashcards/3897787/jpg/intorsion_superior_rectus_when_eye_is_adducted-14BA8B909454257759F-thumb400.jpg I guess that all the gross movement are compound and you can not isolate totally one movement from another, for example the superior rectus elevtaes and intorsion the eye a little bit, but you can't see that intorsion becuase of the work of inferior oplique muscle which also elevate (supraadduct) the eye with a little extorsion.

[@fanofideal6458]

@@user-ek7cy2lx2t thank u sir

[@user-ek7cy2lx2t]

@@fanofideal6458 My pleasure

[@davidpark3267]

Very good video. It would also help us more if you can put texts, so we know how the terminologies are spelt. Thank you!

[@stapsell]

transcript (full text) at eyevideos.blogspot.co.uk/

[@fathima648]

sam tapsell hi i have 1 question some of people have diffrent eye direction like black boll in eye don t know what that called can it be fix

[@Dr.Nilesh_Shukla]

@@fathima648 That is called strabismus, and yes it can be treated by surgery of the muscles involved in the movement of the eye.

[@oiyabastard]

wtf intoursion?? we can do that?

[@ashutoshpandey8875]

I fucking never knew I am that capable!!

[@rs3564]

It's for legends... Get high

[@cyamantakashyap4967]

no bro if you had sharingan than you probably could have seen in on the mirror ,but unlucky for you to not be born to uchiha bloodline clan

[@clareancee140]

😂😂😂😂😂 Shocked right now

[@sumontoroy1672]

We can if anyone has 3rd cranial nerve palsy😐

[@JohnS-mq2mu]

in what circumstances would you, or CAN you, rotate an eyeball as with incyclotorsion?

[@benporter9069]

A bit late, but for the sake of others to see and understand I will answer this. The best example of this would be if you tilt your head to one side (i.e. your ear towards your shoulder) - you will notice that the image you see stays vertical despite your head having turned. This is because as you tilt your head away from the mid-line, the eye intorts, i.e. turns the opposite way, from the direction that the head has turned, such that the eyeball remains vertical and the image is vertically preserved. This is the same idea as when you move your head from side to side but fix on a point in the distance, your eyes turn the opposite way to your head movement to keep the image central. This is called the vestibulo-ocular reflex, and involves sensors in the ear, for those interested! Hope this helps!

[@benporter9069]

curious enough! No problem, hope it helped!

[@utakatasama9155]

@@benporter9069 amazing!!! thank you very much

[@stephenlepage]

@@benporter9069 The best way to observe this is to put on a pair of glasses, and then tilt your head - ear to shoulder. You can observe the glasses' frames rotating around your eyes. That doesn't happen with a camera.

[@Jan-xz8bm]

Great video, thank you. Your pronunciation, explanation and terminology is very clear.

[@stapsell]

I have put the whole transcript online at eyevideos.blogspot.com, so you can read along

[@amirabarka7320]

when would we extort the eye?

[@Sify3100]

Beautifully described, could you describe ipsilateral and contralateral aswell please, thanks!

[@oluchibuchi-njere479]

Your left arm and left leg are ipsilateral. Your left arm and right leg are contralateral.

[@92soofiyanoushad8]

Thank you for the vedio...it helped me to recall things for my exam

[@raunaqchhabra3733]

The abduction of the superior oblique and adduction action of the inferior oblique has not been explained. Please could you make a video on that too.

[@arunsaravanan100]

All oblique are abductors only..so inferior oblique won't have adduction action ..

[@dinkaDPB]

the end was well catchy. i like how he makes the endings stupidly complicated

[@AmethystWoman]

I could be wrong and you seem to be the expert however, it feels to me that you have the adduction and the abduction labels mixed up. ABduction is "moving away from the midline" and ADDuction is moving towards the midline. When the "dummy" moves his eyes "outward" you call it ADDuction when I believe it's actually ABDuction. (unless the pupil moving is not what you are referring to - unless it's something else inside the eye that is "moving towards" when the pupil moves away from the midline?

[@TheKtri]

Thanks for the clear and simple explanation, it helped me a lot!

[@AmethystWoman]

BTW, I am an RN. The way I always remembered this when I was learning medical lingo was to think "when a person is ABDucted, they are "taken away" - so ABDuct is "away" from the midline of the body. You are however consistent. It seems to me each time you use the two words you use them backwards? If I am wrong, please explain? thanks. Hate to have folks learning exactly the opposite of what is true by this video.

[@vjoo6219]

I am 10 years late , but here it is. Focus on one eye alone. Movement of the eyeball outwards/away from the midline - Abduction Movement of the eyeball inwards/towards the midline - Adduction

[@snehadas9017]

@@vjoo6219 never too late 😂😂😂

[@vjoo6219]

@@snehadas9017 better late than never

[@rishabhanand5563]

can't believe this is 14 years old😂

[@Ventus2077]

Thanks for the video but what does "Deviation Conjuguee" means?

[@rohanrajeev2769]

This is GOLD! Thank you.

[@sarajade1322]

thanx for this informative video .. please sir can you make an animated video on saccadic and smooth persuit movement ..

[@lianazainul4843]

label the RE and LE is much better for understanding.. the ADDuction ABDuction sounds similar... make it quite confusing... adding words much better. just a suggestion ^_^

[@GraemeMarkNI]

Very helpful for some work I'm doing, thank you :)

[@uyiomere1114]

how does one intort/extort their eyeballs

[@terryzuniga2473]

I didn't know that the cornea could move like that!! what events or idk... 'emotions' cause it?

[@sathishnarlasupernapier925]

Sir I have eye movement problem how to solve this

[@davidlopes27]

for those confused about intosion and extorsion, I can explain. when the eye is already looking at one of the sides, these muscles help moving the eye superiorly and inferiorly, and when your eye is already at one of the sides the superior and inferior rectuses cant act alone in order to move the eye, so then we need these suporting muscles.

[@hydawo]

Thanks Sam, very useful

[@viveksinghchauhan7496]

Thankyou sir . Video was really helpful.

[@abhilashasharma7450]

I have one doubt about this extorsion is movement of cornea

[@604josh]

You have to listen more carefully. He is using ADDuction and ABDuction correctly.

[@coffeebreakhero3743]

bless you, kind sir.

[@abhilashasharma7450]

What is difference between intorsion and abductiom

[@ziraldoalves]

Really good. Thanks so much !

[@wesalalobiedy7371]

We don't test up and down in ductions

[@ansaaslam3553]

Can u tell when there will be extortion. Is eyeball rotate

[@marceljenkins8701]

Thank u.. Really useful

[@ashutoshtripathi5279]

If limitation in upper side movement. What can i do

[@batsoygamingofficial5260]

When i look at the mirror, i see my eye not moving while watching anywhere.

[@smrtyasir]

andha

[@IHengH]

Adding some words /subtitles into the video should help more i think

[@ayamohammed4258]

thank you sir this is amazing

[@amandalilley3780]

really interesting.. ..thankyou.

[@ambareeshr1390]

Can anyone move one eye at a time?

[@ughsirius]

Thank you so much!! ❤

[@user-zp2do7dk3u]

I move my eyes only when moving the head

[@divyalakshmi348]

Thank you 😊 💓 ☺️ 💗 👌👏👏👏

[@Lily-cl6zk]

really good vid, but could you also write the names on screen for spelling purposes

[@mehertejkoppuravuri2747]

Nice and clear

[@Peacecraft117]

Wth didn’t knew the eye could rotate

[@scoleyx]

You're amazing

[@johncook1997]

Does anyone know the name of the tune at the end or where I can find it?

[@stapsell]

It was part of the iMovie licence free music library when I did this in 2007...haven't looked at iMovie for a long time now!

[@sanjulawickremasinghe3793]

Thank you sir 🔥🔥🙏

[@nili224]

clean explantion but would be better with tittle

[@biancasio]

very helpful.. thank you!

[@raskirubhakharan6793]

Superb

[@user-oh6yt7lq4b]

ممكن بالصور

[@meenasalve6265]

Thnx

[@noorana9438]

thanks

[@mantassernas5740]

Rotation become clear when i watched it with 0,25 speed

[@CalifaJohn]

Thank you.

[@ronaksingh8187]

ñ

[@avinash98msvm63]

Very good👍

[@tomc360]

Thanks!

[@stapsell]

@AmethystWoman You have misheard me. Probably easiest if you read the transcript at: eyevideos.blogspot.com

[@JamaSahal]

Thanks U so much.

[@pietzeekoe]

Ahh I was expecting derp-eyes

[@wankyiffer9276]

eye understand now

[@safwanbk5778]

Super 👍👍

[@callumfreebairn8082]

in defence, a tic

[@mastermo666]

Sick video

[@fhanege23]

than fuck off

[@swingthemood82]

wow..thanks...

[@dundusali]

thank you :)

[@awadood5866]

it was lovely

[@josephde-zordi7324]

Thank you, what software was used to make this?

[@stapsell]

blender.org for animations, slides in keynote, combined in iMovie

[@yuditaeffendi1423]

Clear and the him

[@wesalmabruk1437]

Thanks ^_^

[@voodoochild4236]

Im watching at 3am and its creepy

[@jayprakash-uo5pg]

👌👌👌

[@viju345]

Not enough.....

[@zombiechibixd]

"or depression" laughing like hell

[@stephanie9499]

There is no God except Allah, prophet Muhammad is the messenger of Allah ❤️🌸 Jesus (Peace be upon him) never said that he is God, the Quran says: And [beware the Day] when Allah will say, “O Jesus, Son of Mary, did you say to the people, ‘Take me and my mother as deities besidesAllah ?'” He will say, “Exalted are You! It was not for me to say that to which I have no right. If I had said it, You would have known it. You know what is within myself, and I do not know what is within Yourself. Indeed, it is You who is Knower of the unseen. 117. I said not to them except what You commanded me - to worship Allah , my Lord and your Lord. And I was a witness over them as long as I was among them; but when You took me up, You were the Observer over them, and You are, over all things, Witness. 118. If You should punish them - indeed they are Your servants; but if You forgive them - indeed it is You who is the Exalted in Might, the Wise. (Holy Quran 5:116-118) .

[@abdallamaaya2270]

What is that??? Intorsion or extorsion!!!

[@lostcity-thunderbeings8034]

Write the terms so it helps spelling. I didn't know the eyes rotates...

[@abdulnasir89]

Still wtf is intorsion?

[@105.LakshmiVennelaVarada]

Exactly!!!!!

[@KidsFunTVs]

😍😍😍✌🏽✌🏽✌🏽

[@abhilashasharma7450]

Not clearify intorsion and extorsion

[@daisyblue4073]

Too bad you block pinning this video to Pinterest for a wider audience.

[@CharlesCA]

You're accent is too strong to differentiate between a-B-duction and a-D-duction. May I suggest you say it like it's spelled next time?

[@stapsell]

transcript (full text) at eyevideos.blogspot.co.uk/

[@CharlesCA]

***** Because the words sound so similar, people say a-D-duction and a-B-duction. It's not rude.

[@nani_official_foryou2067]

No

[@florencelubinda1777]

Sorry i did not look at you my eyes wer on reduction position

[@jihadzayed6126]

🤦🏻‍♂️🤦🏻‍♂️🤦🏻‍♂️

[@jnmks]

that face is creeping me out

[@dazz4851]

How did you get Jeff bezos to volunteer for this video?

[@maisa303]

thanks