Anatomy of the Eye Video

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This second video is chock-full of high-yield anatomy facts. The eye is a complex structure with layers, lens, muscles, receptors, that is surrounded by many bones. I keep things simple in this video, and correlate directly with the anatomy chapter from the book. I’ve also scanned in an entire head CT to help you correlate the cartoons with real clinical imaging. Here are screen-captures from this video:

Screen Captures from this Video:

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The orbicularis closes the eye, while the levator raises the lids. Each has their own innervation (cranial nerves 7 and 3)

video-limbus.jpg
The external eye is covered by the thin conjunctival tissue, which inserts at the limbus of the eye.

video-ctorbitalmuscles.jpg
The nasolacrimal duct drains tears from the eye surface into the nose – explaining why your nose runs when you cry. You can see this duct on CT.

video-punctum.jpg
The punctum is small and located on the medial lid, near the nose. We can put plugs in the punctum to help with dry eye.

video-lashpunctum.jpg
This patient has an eyelash that’s stuck in the punctum.

video-eyeglobe.jpg
The cornea and sclera are continuous with each other … however, the cornea is clear because it is relatively dehydrated.

video-cornealayers.jpg
The cornea has five layers – the endothelial layer acts as a pump to keep the cornea dehydrated.

video-anteriorchamber1.jpg
The ciliary body sits behind the iris and tethers the lens in place by a 360 degree network of zonular fibers.

video-maturecataract.jpg
The lens has the configuration of a peanut M&M with an outer capsule, middle cortex, and central nucleus. In this advanced cataract, the cortex has liquefied into a milky consistency, and the central brown nucleus has sunk to the bottom.

video-eyemuscles.jpg
Eye movement is controlled by rectus and oblique muscles that tether the eye and connect at the orbital apex.

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The orbital walls are formed by seven separate bones. They aren’t that difficult to learn when you review them one-by-one.

video-ctorbit.jpg
You can see the orbital bones and the extraocular muscles on CT – a coronal view like this one works best.

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Dr. Timothy Root is a practicing ophthalmologist and cataract surgeon in Daytona Beach, Florida. His books, video lectures, and training resources can be found at:

119 COMMENTS

  1. its informative, good enough explainatory and very healthy education abt outer adnexa and anotomy in short time, excelent explaination ‘m looking more video abt this topic if u guys have just email me plz
    thanx and best regards

  2. I’ve been studying from books for my OMA certification but I’ve never been able to see the eye pictured like this. It has been a tremendous eye opening help (pun intended). Thank you so much.

  3. I am a 4th year medical student. Currently attending eye ward @Hamdard University,Karachi, Pakistan. This video has helped me immensely and it made and impact on my memory (which is a very difficult job to do)…
    I appreciate the simple examplainatory method and awesome slides. You have done great service for humanity…
    Rasheed Syed 🙂

  4. the lecture was great and appropriately related all the clinicals.i think all students learning about eye should watch the video.

  5. I am a student of B.Sc(HONS)Optometry and Orthoptics(ALLIED HEALTH SCIENCES) 2nd year in NISHTAR MEDICAL COLLEGE ,MULTAN, PAKISTAN.This video is especially helpful for the students of Optometry and Orthoptics.I am grateful to the site runners because.
    Nishat Bokhary

  6. congratulations!!!!!!
    I liked it, I Think that this kind of images are good like material.
    One of the best things to learn anatomy is although pictures. that help me ….. thanks!!!!!

  7. I am attending school for a Visual Impairment teaching certification, so I have no medical background. I am required to take an eye anatomy and visual functions class that has a very technical and confusing textbook. This video made turned gibberish and nonsense into something I could process! Keep it up and PLEASE make more videos!

  8. Ilove the video and would like it very much if youl could send me the link through which i can download it so that it will assist me in learning my ocular anatoomy

  9. MUY INTERESANTE, PERO SERIA MUCHO MAS BENEFICIOSO TENER LA PRESENTACION EN ESPAÑOL, SOMOS MUCHOS LOS OPTOMETRAS DE HABLA HISPANA QUE QUEREMOS APROVECHAR AL MAXIMO TAN IMPORTANTE MATERIAL… GRACIAS Y ESPERO SUS COMENTARIOS AL RESPECTO

  10. thanks a lot. this video should be used as an introduction before hitting the core anatomy of the orbit and the eyeball and surely as a first chapter in an ophthalmology course. i hope you keep on doing this great job.

  11. guys i wanna tell you that you are unbeievable-you give free amazing awesome lectures to all people just to make them understand-god bless you – my best wishes

    azhar hussain
    libya

  12. Thank you so much.
    These are all perfect,artistic.I have seen different videos from different resources,but watching yours,encourage me to study more.You know all what we need to know.
    Again,this is ”art”.

  13. I would like to partner with you.
    I am planning to establish an Online University for the poor communities of Madagascar. One of the subject I want to offer (not for making profit) is Ophthalmology.

    Could you let me know how can it be possible?
    Best regards,
    Faly

  14. Really excellent work,I greatly appreciate your hard work and effort , I will give this site to my students to let them see how to be devoted to their work.
    Thank you sooooooo much

  15. The cornea is not dehydrated relative to the sclera. It is actually the other way around, due to the cornea having ~4 times the number of glycosaminoglycans as the sclera. The hydration provides the proper spacing between collagen bundles to cause destructive interference, reducing scatter.

  16. hey awesome video.
    it cleared all my doubts.
    can u please please explain development of eye.i find embryology really boring and difficult to understand.

  17. The video does not load on my computer. I am certain I have flash installed. Does anyone else have this issue too?

  18. wonderful
    thank YOU
    I hope there will be more videos to watch with most common eye pathology.I am a general practioner and this concise videos are what I need and can change my practice thanx to you

  19. Wow, I am a medical student from Japan and I am enjoying these vids to the fullest. You are AWEEEEEEESOME!! I’ve already watched each vid x2 and am really really hoping you’d make many more of this!! Wish you could do this for all the medical specialties, you have so much talent, you are very funny, and keep the audience entertained. Never found optho so fun. Again, thanks for making such a generous contribution to all the world!!!! Will be sharing this site with others. LOVE

  20. hi i am ophthamalogist in pakistan this video opened my fourteen closed doors. So please shared full knowledge of books and full subjects of ophthalmology. Thanks many times

  21. I am indeed impressed by the great video and a very simple and comprehensive explanation. I am able to understand the anatomy of the human eye. Please more videos for other aspects of anatomy. Thanks.

  22. I am indeed impressed by the great video and a very simple and comprehensive explanation.
    Regards from intern from Palestine Al-Quds

  23. Pls how can i download your videos:i’ve watched the video on retinoscopy from a friends laptop,it was awesome.am a 5th year student of optometry in university of Benin Nigeria.

  24. I am a teacher of young children who are blind and low vision. I have been using your videos to upskill my colleagues on the anatomy and physiology of the eye so they can better understand the children’s eye conditions. Your style is clear and concise and that makes it accessible to everyone. Thanks and please do more! A series on common eye conditions would be very helpful!

  25. WONDERFUL,VERY INFORMATIVE LECTURE, AND ALL THE ILLUSTRATIONS HELPED ME INDEED FOR BETTER UNDERSTANDING AND TO REMEMBER…THANK YOU VERY MUCH DR ROOT

  26. It’s awesome! It was so boring to learn ophthalmology by faculty’s book. This one is much better! Can’t imagine my exam preparation without this stuff! Thank u, Tim! U r the best ophtolomology teacher ever!:)

  27. Amazing video! Is there a way to start the video at certain times? Clicking at a specific time just takes the video back to the beginning.

    Thank you!

  28. Thanks so much for making this whole thing free. I’ve finish reading the book and would like to watch all the videos too. Unfortunately, almighty Great Wall of China don’t really like Vimeo, these video simply won’t load! Is there any other ways that I can assess them?

  29. Agree with the amazingness, BUT like April 29th says, if you try to click on the timeline of the video it takes you right back to the beginning, which is VERY frustrating. If you want to rewind at all to hear something again, it’s impossible and will make you have to start from the beginning, and once you’re there, there’s no fast forwarding either.

  30. I love this site! Having the visuals with the explanation really helps me understand what I’ve read about 100 times! Thanks for not charging for this info too!!

  31. THIS IS AN AMAZING CHANCE TO LEARN, IN DETAIL, THE THINGS I HAVE THE MOST TROUBLE WITH AS AN OPTOMETRIST’S ASSISTANT AND TECHNICIAN. THANK YOU SO MUCH FOR THIS WONDERFUL AND HELPFUL INFORMATION.

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