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.
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
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.
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
Comment by Rasheedullah Syed — May 22, 2009 @ 9:47 am
Awesome!a simple and methodical way.thanks for a quick revision.
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
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
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
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!
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
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
[…] annotated pictures (language is Dutch). The anatomy of the eye is also very nicely illustrated in a video lecture from […]
Comment by ahmed nassar — November 12, 2009 @ 3:03 pm
thousands of thanks from me to everybody connected to crate this…………thanks
Comment by dhaval shah — November 20, 2009 @ 2:34 am
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
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
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
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
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”.
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
thank u so much to all connected vid sharing this valuble knowledge n making optha more easy n interesting….
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
what a video !
it’s amazing
go on…..thanks for your efforts
Comment by fatenabdallah — December 26, 2010 @ 10:02 am
its very good and make everythings easy thank u very much
Comment by Kamal mostafa — January 7, 2011 @ 1:40 am
Excellent video;
Thanks a lot.
Regards from Madagascar
Great!
Comment by philantoo — February 24, 2011 @ 2:47 am
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.
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.
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
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
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
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.
