eye disorders
Preseptal and Orbital Cellulitis
Pathophysiology of Preseptal and Orbital Cellulitis
Because orbital cellulitis originates from large adjacent foci of fulminant infection (eg, sinusitis) separated by only a thin bone barrier, orbital infection can be extensive and severe. Subperiosteal fluid collections, some quite large, can accumulate; they are called subperiosteal abscesses, but many are sterile initially. Complications with orbital cellulitis include vision loss (3 to 11%) due to ischemic retinopathy and optic neuropathy caused by increased intraorbital pressure; restricted ocular movements (ophthalmoplegia) caused by soft-tissue inflammation; and intracranial sequelae from central spread of infection, including Cavernous Sinus Thrombosis , meningitis, and cerebral abscess. 