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Anatomy of the Eye Video
length: 25 minutes
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:
The orbicularis closes the eye, while the levator raises the lids. Each has their own innervation (cranial nerves 7 and 3)
The external eye is covered by the thin conjunctival tissue, which inserts at the limbus of the eye.
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.
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.
This patient has an eyelash that’s stuck in the punctum.
The cornea and sclera are continuous with each other … however, the cornea is clear because it is relatively dehydrated.
The cornea has five layers – the endothelial layer acts as a pump to keep the cornea dehydrated.
The ciliary body sits behind the iris and tethers the lens in place by a 360 degree network of zonular fibers.
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.
Eye movement is controlled by rectus and oblique muscles that tether the eye and connect at the orbital apex.
The orbital walls are formed by seven separate bones. They aren’t that difficult to learn when you review them one-by-one.
You can see the orbital bones and the extraocular muscles on CT – a coronal view like this one works best.
Comments and Feedback
95 Comments
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the films are perfect.
congratulations.
Comment by HECTOR BARAJAS — March 16, 2008 @ 3:18 pm
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It is nicely explained.Good job!
Comment by gurinder — June 14, 2008 @ 2:39 am
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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
Comment by Jaff syed — June 19, 2008 @ 4:37 pm
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this information is very use full students, very good diagrames simple points,
Comment by Mohd. Atheeq Ahamed — September 17, 2008 @ 5:01 am
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Thank you very much , this video helped me alot in understanding the anatomy of the eye … keep going ^-^
Comment by emma — November 5, 2008 @ 2:17 pm
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it is execellent i really enjoy iy
Comment by basma — November 25, 2008 @ 5:00 pm
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would like to see more!!
Comment by Dr.Vijay Dani — February 23, 2009 @ 7:32 am
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Thank you very much. This was great. It really helps students understand.
Comment by Brooke — February 26, 2009 @ 9:42 pm
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Superb! Thanks
Comment by usop — March 1, 2009 @ 9:31 am
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i wanted to revise the eye anatomy before starting opthalmology 25 min worth watching the vidio thank you so much
Comment by devyani — March 23, 2009 @ 11:47 am
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this video was really very helpful….
Comment by swathi — March 24, 2009 @ 7:13 am
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hope everybody is doing fine.these videos are superb!but what should i do to download them?
Comment by nur — March 29, 2009 @ 7:49 am
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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.
Comment by Karri — April 21, 2009 @ 12:24 am
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Nice.
But where do i download this video ? is there any link to download it ?
Comment by Dark Lord — April 28, 2009 @ 8:43 am
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It really helped me 2 understand the basics about the eye…pictures and illustrations were very helpful
Comment by piyumi — May 13, 2009 @ 9:09 pm
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Awesome!a simple and methodical way.thanks for a quick revision.
Comment by suba — May 28, 2009 @ 6:15 am
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This is one of the best medical websites I have ever seen.
Comment by chris — June 11, 2009 @ 12:28 pm
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the lecture was great and appropriately related all the clinicals.i think all students learning about eye should watch the video.
Comment by aiza ansari — June 13, 2009 @ 12:54 pm
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super ..when wil lens optics come..i’m waiting..
please put it up soon
Comment by momo — June 19, 2009 @ 2:22 pm
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Simply exellent.
Comment by Farooq Ahmed Moghul — July 28, 2009 @ 8:52 am
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Perfect video for ocular anatomy!
Comment by Giba — July 31, 2009 @ 9:31 am
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Awesome！
Comment by Peter Pan — July 31, 2009 @ 10:21 am
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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
Comment by Nishat Bokhary — August 3, 2009 @ 8:36 am
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Very good presentation. Thank you. This will assist me with my class lectures on Anatomy in a Surgical Technology class.
Comment by DDougherty — September 5, 2009 @ 9:18 pm
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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!!!!!
Comment by edna mora — September 10, 2009 @ 11:44 am
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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!
Comment by Jenn Karn — September 11, 2009 @ 9:08 pm
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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
Comment by Addai Richard — September 28, 2009 @ 9:15 am
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The videos are a joy to watch and a welcome respite from the world of textbooks. Thank you.
Comment by J Rouwhorst — October 4, 2009 @ 2:35 pm
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fantastic lecture and great site
Comment by ahmed nassar — November 12, 2009 @ 3:03 pm
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thousands of thanks from me to everybody connected to crate this…………thanks
Comment by dhaval shah — November 20, 2009 @ 2:34 am
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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
Comment by fernando ruiz — December 2, 2009 @ 9:32 pm
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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.
Comment by veshak kumar keerpaul — January 16, 2010 @ 4:47 am
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Thank you Dr. Root. brilliant and easy to follow video. Keep up the good work.
Comment by Syed Junaid — January 25, 2010 @ 5:15 pm
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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
Comment by whiteman — January 27, 2010 @ 6:49 pm
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Hi, this is just great! =) Thank you very much.
Comment by Ana — March 8, 2010 @ 8:01 pm
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thaaaaaanx………..i was confused of d interior
Comment by aashish — March 22, 2010 @ 11:15 pm
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it is brilliant idea but ican’t acsses to see cartoon videos
Comment by salma — March 23, 2010 @ 6:47 am
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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”.
Comment by Shahram — March 29, 2010 @ 1:30 am
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it is great site for learning
Comment by mohammed — April 27, 2010 @ 5:21 am
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Excelente, gracias por su tiempo para realizar estos videos de gran ayuda pedagogica
Comment by José Fernando Castillo L — April 29, 2010 @ 8:07 am
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Hello,
That was really Great, I can’t express my thankfulness 
Excellent job !
Comment by dr-HAM — April 30, 2010 @ 1:30 pm
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thank you very much for this excellent website.
Comment by rasha — May 4, 2010 @ 3:12 am
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Thanks for this.
Comment by Dr leena — May 27, 2010 @ 3:08 am
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Thanks for the video and website!!!
Comment by M. Cooper — May 27, 2010 @ 9:54 am
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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
Comment by Rafieferana Faly — June 10, 2010 @ 10:38 am
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thank u so much to all connected vid sharing this valuble knowledge n making optha more easy n interesting….
Comment by sonali — June 23, 2010 @ 5:44 am
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thanks recpectable persons
Comment by DR ZAFAR KHAN SANGHAR — June 26, 2010 @ 11:35 am
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This is a very nice review course for boards! Thank you!
Comment by WashDoc — July 18, 2010 @ 9:33 pm
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awesome lecture man
love it
thanks
xoxo
Comment by adeel — July 28, 2010 @ 12:16 am
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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
Comment by Prof Dalal Shawky,Professor of ophthalmology , Alexandria University — August 22, 2010 @ 5:20 pm
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what a video !
it’s amazing
go on…..thanks for your efforts
Comment by fatenabdallah — December 26, 2010 @ 10:02 am
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its very good and make everythings easy thank u very much
Comment by Kamal mostafa — January 7, 2011 @ 1:40 am
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Excellent video;
Thanks a lot.
Regards from Madagascar
Great!
Comment by philantoo — February 24, 2011 @ 2:47 am
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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.
Comment by Steven — March 11, 2011 @ 1:31 am
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Great work thank you alot for the great efforts:)
Comment by Mohammad Halabi — March 14, 2011 @ 6:53 pm
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thnx a lot ……….keep this work goin on…..it helps us…..
Comment by ayesha — March 27, 2011 @ 7:06 am
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Excellent Video and great work , Cannot thank you enough Dr.Root
Comment by brandon Mchiver — April 9, 2011 @ 1:35 pm
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thanks a lot…m a medical student very useful…
Comment by aswin — April 11, 2011 @ 7:21 am
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Very good and helpful. Thanks a lot.
Comment by Cindy — April 25, 2011 @ 8:50 pm
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thanks a lot…
Comment by gayathri — May 11, 2011 @ 9:03 am
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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.
Comment by juhi shah — June 8, 2011 @ 12:56 pm
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thanks a lot
the video is clear for d understanding of d ug student
Comment by rajesh — June 26, 2011 @ 1:24 am
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The video does not load on my computer. I am certain I have flash installed. Does anyone else have this issue too?
Comment by Covert — July 2, 2011 @ 9:41 pm
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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
Comment by RASULY — July 24, 2011 @ 2:38 pm
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thank you
very nice demonstration
Comment by Mahmoud Elghala — July 28, 2011 @ 3:14 am
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loveeeddd it…your site is precious…
may god bless you for such noble services..:)
Comment by aly — September 10, 2011 @ 1:17 am
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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
Comment by optogal — September 21, 2011 @ 8:30 pm
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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
Comment by faisal — October 11, 2011 @ 9:54 am
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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.
Comment by Indira — October 31, 2011 @ 3:37 am
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very good video and helps to understand the sublect
Comment by p r prasanna klumar — November 15, 2011 @ 12:00 am
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I am indeed impressed by the great video and a very simple and comprehensive explanation.
Regards from intern from Palestine Al-Quds
Comment by hijo — January 7, 2012 @ 4:59 pm
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thank you vetymuch
this is great
Comment by rongjunbo — January 16, 2012 @ 12:15 pm
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superb video easy way to understand ………………..how to download??????????????????????
Comment by shiney — January 16, 2012 @ 12:47 pm
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It is a very useful site for medical students. Thanks very much for your contribution to us students’ learning.
Comment by Hulya Guller — February 7, 2012 @ 4:47 pm
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amazing…thanks SO much!
Comment by may — February 22, 2012 @ 10:13 am
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great experience…wonderful site..thanx for being there..:)
Comment by megha — February 29, 2012 @ 9:24 am
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im from bangladesh.
Great work, thanks alot for the great efforts:)
Comment by nush — March 14, 2012 @ 5:02 am
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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.
Comment by steve — March 20, 2012 @ 10:24 pm
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i m from somalia
i m medical student this is very usefull. thank you very much, you did great work.
Comment by mustaf — May 30, 2012 @ 11:03 am
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It’s make easy to learn
Comment by Satyaranjan — August 13, 2012 @ 9:02 am
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im a medicine student from iran
many thanx for your useful efforts
Comment by younes — August 28, 2012 @ 2:55 pm
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Very good presentation
Comment by Omar — October 16, 2012 @ 12:37 pm
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vary thanks for this video
Comment by wali — December 7, 2012 @ 2:09 pm
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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!
Comment by Linda — February 24, 2013 @ 4:13 pm
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this a great resorce to my projectcs im working on i might actually get an a plus
Comment by alysha stobaugh — March 6, 2013 @ 11:08 am
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Thank you for great work
I hope u do lectures in instruments and investigations of ophtholmology
Comment by Egypt — April 14, 2013 @ 10:36 am
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Exellent!!
Comment by Ana Mairena — May 4, 2013 @ 1:07 pm
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WONDERFUL,VERY INFORMATIVE LECTURE, AND ALL THE ILLUSTRATIONS HELPED ME INDEED FOR BETTER UNDERSTANDING AND TO REMEMBER…THANK YOU VERY MUCH DR ROOT
Comment by KUMARI — May 5, 2013 @ 12:51 pm
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