Periorbital Cellulitis: Pathogenesis and Clinical Findings
a. Dacryoadenitis: infection of the lacrimal glands
b. Conjunctivitis: inflammation of the conjunctiva
c. Chalazion: a benign, painless bump or nodule inside the upper or lower eyelid which results from healed internal hordeolums that are no longer infectious.
d. Dacryocystitis: an infection of the lacrimal sac, secondary to obstruction of the nasolacrimal duct at the junction of lacrimal sac.
e. Hordeolum: localized infection or inflammation of the eyelid margin involving hair follicles of the eyelashes or meibomian glands.
Eye exam should reveal normal:
- extra-ocular movements and globe position
- pupillary reflex and visual acuity
If any are abnormal, the presentation is no longer considered periorbital cellulitis, as the infection has likely spread beyond the preseptal compartment/orbital septum. If the eye cannot be assessed, the patient NEEDS a CT scan.
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