Periorbital Cellulitis: Pathogenesis and Clinical Findings Definitions: 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. Note: 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. #Periorbital #Cellulitis #pathophysiology #ophthalmology #diagnosis #signs #symptoms
