Common Eye Infections Video

This video illustrates the important infections involving the eye: including conjunctivitis, blepharitis, HSV infection, pre-septal cellulitis, and endophthalmitis. I’ve included some full-motion videos and full CT scans demonstrating orbital cellulitis findings.

Screen Captures from this Video:

We begin with a review of the three types of conjunctivitis and the common symptoms with each.

EKC is caused by certain strains of viral conjunctivitis. You get sub-epithelial infiltrates that can affect the cornea.

Follicles and papilla form on the inside of the eyelids. They look different, but aren’t that useful for differentiating the type of conjunctivitis

Pseudomembranes like this can occur with severe conjunctivitis. Pseudomembranes don’t bleed when removed. True membranes will bleed, and are associated with severe disease like Stevens Johnson.

Allergic conjunctivitis characteristically have itching and swelling. This cartoon shows allergic shiners.

Blepharitis is a dysfunction of the meibomian glands. These small glands pump oil into the tear film – this oil keeps the tears from evaporating too quickly.

You treat blepharitis with warm compresses, lid scrubs, and artificial tears. Doxycycline can help by changing oil viscosity.

Chalazions are non-infections inflammations of the meibomian glands. This is different from a stye, which is an infection of a sweat-gland or hair follicle, similar to a pimple.

An ulcer is an abrasion plus an infection.

When approaching a lid infection, you must determine if the infection is pre- or post-septal.

Most orbital cellulitis arises from sinus disease. This CT shows a proptotic eye with coexisting frontal sinus infection.

HSV infection of the cornea shows the classic dendritic ulcer.

Endophthalmitis is a serious infection inside the eye.

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:


  1. thank you very very very much! i am a med student and i didn’t really understood the eye so good at my ophthalmo classes as I did by watching your videos!thanks

  2. Thanks so much, this is has been of so much help. I am a medical student and these topics were not covered sufficantly during the term. However this has made things crystal clear. Thaaaaaaaaaaaaaannnnnnnnkkkkkkkksssssssss

  3. really a interesting n helpful video presentation, covering few but important topics of eyes.Now i really understand whats the difference between different types of conjunctivitis and chalazion vs stye…thanxx!!!

  4. Very nice video. Found this video while doing usmleworld questions. This allowed a lot of my pure memorization to be purified as knowledge and understanding. I feel like if I were in the emergency room with these situations I could at least recognize now what is going on. THank yoU!

  5. Woudeful job. I hope all other subspecialites learn from you haow to teach and how to supply doctors with these resourses for free for the good of all the patients in the world and to make things easer for the doctors to uderstand .
    I am really impreesed

  6. Thank you for a GREAT easy to understand lecture. I would have loved to learn more eye disorders.Excellent lecture.. Nice short and sweet.

  7. Thank you so much! I’m an NP student and find the eye incredibly challenging. You’ve made this clear and easier to understand! Great speaker and good visuals!

  8. Hello. Great presentation for general understanding. Five children, many eye health this woderful clarification.

    Please…do you have a similar video presentation on sicca related to Sjögren’s Syndrome? I need it urgently.

    Thanks again.

  9. dear sir you are doing a grade piece of work by keeping this site.its really nice and very worth to me for my post graduate orks.thanks a lot.

  10. thank you so much for these videos and this site! i am going to be a med intern and the eyes are a mystery to me! now at least i won’t consult ophtho before i even see the patient:)

  11. Thank you for a very useful website! These are great lectures for anyone in primary care (FP/ER/IM) residency to refer to. Makes it very easy to understand for the non-opthamologist!

  12. ur work is relly gud …u r best …..Common Eye Infections Video is not working well .. i tried but i can’t see it here .. ur all other video is working well .. plz .. check it …. hope ..i will see it soon .. once again .. ur work is really excellent …-). hv a gud life..

    Tim Root:Thanks for the kind words. This video seems to be working well on my end. You may want to try going directly to the infection video directly at Vimeo and watch it there. Good luck!

  13. “Endophthalmitis is bad” – after the photo you showed in the video, that is understatement of the year. ick! Gross factor aside, thanks for the excellent video! 😀

  14. A very very helpful site.
    Hats off to you… I am in love with this site, it has made my interest grow more towards Ophthalmology.

    Thank you very much it was a very helpful information. I can use it in practice as an optician.
    A very helpful site

  16. dear sir ,
    as a undergraduate student i had a lot of problems understanding many concepts in ophthalmology-especially retinoscopy procedure , the slit lamp examination….thanks a lot for lectures on these topics…..all the lectures are very informative.and helped me get my basic concepts cleared……
    thank you very much once again!!!…….

  17. i really got the things nw,,,thanks dr.dude…….bt they are not being downlodid in my computer …..yyyyyyyyyyyyyyyyyyy

  18. Thank you so much! Is it possible to make these lectures downloadable? I would like to export them to my tablet so I can review them:) It would mean a lot to me, thank you!


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