Orbital trauma

Preseptal or periorbital cellulitis is an infectious process involving lid structures anterior to the orbital septum. The condition generally occurs due to one of three clinical scenarios (1) secondary to a localized infection or an inflammation of the eyelids or adjacent structures (i.e., sinusitis, conjunctivitis, blepharitis, and/or internal hordeolum), (2) secondary to eyelid or fecial trauma, and (3) after an upper respiratory tract infection. 

Kleinheinz J, Stamm T, Meier N, Wiesmann HP, Ehmer U, Joos U (2000) Three-dimensional magnetic resonance imaging of the orbit in craniofacial malformations and trauma. Int J Adult Orthodon Orthognath Surg 15 64-68... 

Traumatic lesions of neural structures within or surrounding the orbit seldom occur without associated bony or soft tissue injury to the orbit. They are most frequently associated with complex trauma to the face or the frontal neurocranium (Mueller-Forell and PiTZ 2004). MDCT and MRI are particularly useful to demonstrate the acute and chronic features of complex facial and neurocranial injury, and to visualize affection of the optic nerve canal (Linnau et al. 2003). 

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