AbstractOrbital cellulitis is an inflammation of the preseptal (eyelid) or retroseptal orbit. Whereas the preseptal form is rather harmless, retroseptal cellulitis is both vision- and life-threatening. Orbital cellulitis is mostly seen as an infection that extends from the paranasal sinuses or may have spread from dermal infections. Orbital cellulitis can be diffuse or present as a subperiosteal empyema or, more rarely, as an orbital abscess. Extension of the inflammatory process can lead to intracranial involvement, such as cavernous sinus thrombosis. Antibiotic treatment will cure the disease in most cases, although sometimes, surgical drainage is required.