Ophthalmology Flashcards
What is a hordeolum?
localized infection or inflammation of the eyelid margin involving hair follicles of the eyelashes
What is an internal hordeolum compared to an external hordeolum?
An internal hordeolum is a meibomiam gland abscess that points towards the conjunctiival surface/presents on the inside of the eyelid. An external hordeolum or sty is a smaller abscess on the margin of the eyelid.
What is the pathophysiology/ most common cause of hordeola?
Hordeolum’s are common staphylococcal abscesses. Most commonly Staph aureus.
Which age group does hordeola most commonly affect?
Children and teens
What are common symptoms of Hordeola?
eyelid redness tearing swelling pain photophobia foreign body sensation vision acuity is normal
If left untreated, or does not respond to treatment, what general illness can hordeola lead to?
general cellulitis of the lid
In what situation are hordeola diagnosed, and what might it be hard to distinguish from?
Hordeola are diagnosed in the clinic, but can be difficult to distinguish from chalazion.
How is a hordeolum treated?
warm compresses are helpful (5-10 minutes, 3-4 times a day)
incision, if a resolution does not begin within 48 hours
applying antibiotic ointment may be beneficial every 3 hours in the acute stage
What is a chalazion?
a noninfectious obstruction of the meibomiam gland; a common granulomatous inflammation of a Meibomian gland that may follow an internal hordeolum
What are granulomas?
a collection of immune cells that form when the immune system attemps to wall off substances it perceives to be foreign, but cannot eliminate
What is the cause of Chalazia?
The meibomian gland becomes blocked by accumulation of secretion, often in a patient with blepharitis; blocked meibomian gland’s duct releases gland contents into soft tissue of the eyelid, causing a build-up under the eyelid
What other lid disorders can contribute to Chalazia?
hordeola and blepharitis
Chalazia are common among patients with what other type of conditions?
Chalazia are commonly found in patients with other skin conditions
What are common symptoms of Chalazion?
eyelid redness
nontender swelling on the lid
swelling of the adjacent conjunctiva
may distort vision, if the swelling is large enough to impress the cornea
How would you treat Chalazion?
warm compresses are helpful (5-10 minutes, 3-4 times a day)
incision and curettage, if chalazion persists past several weeks
corticosteroid injection may also be effective (reduces inflammation)
How do you distinguish between chalazion and hordeolum?
After a few days, chalazion will be nontender, and localization will occur away from the lid margin. Whereas, hordeolum will remain painful and present on the lid margin near the eyelashes. Hordeolum are also infectious, whereas chalazion are not.
What is Blepharitis?
inflammation of the eyelid margins that may be acute or chronic
List 5 ways that Blepharitis can be characterized.
- Acute Ulcerative
- Acute Non-Ulcerative
- Chronic
- Anterior
- Posterior
What is the cause of Acute Ulcerative Blepharitis?
caused by a bacterial infection; usually staphylococcal
may also be caused by a virus (herpes simplex, varicella zoster)
What is the cause of Acute Nonulcerative Blepharitis?
caused by an allergic reaction
What area of the eye does Acute Blepharitis affect?
the eyelid margin at origins of the eyelashes
What is the difference between eye discharge caused by a bacterial infection and discharge caused by a viral infection?
Bacterial infections cause crusty looking, pussy discharge. Viral infections cause watery, wet discharge.
What is the cause of Chronic Blepharitis?
we don’t know; chronic blepharitis is ideopathic noninfectious
inflammation
What does seborrheic mean?
common red, itchy skin rash