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.
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
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
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!!!
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!
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
