Peri-Orbital vs Orbital Cellulitis

What differentiates Peri-orbital from Orbital Cellulitis is which side of the orbital septum the infection is on. The orbital septum is a layer of fascia that extends vertically from the periosteum of the orbital rim  down to the elevator aponeurosis and the inferior border of the tarsal plate. Anatomically that’s great, but clinically it doesn’t…

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