Orbital cellulitis

• Facts:
  Infection involving the fat and muscles within the orbit
• History / PE:
  Swollen, painful eye
  Fever
  Decreased visual acuity
  Protrusion of eyeball (proptosis)
• Diagnosis:
  CT scan
• Differential Diagnosis:
  Preseptal cellulitis (no decrease in visual acuity)
  Anterior uveitis (no eyelid involvement)
  Cavernous sinus thrombosis (bilateral symptoms)
  Conjunctivitis (no pain with eye movements)