What management step is essential for orbital cellulitis diagnosis?

For diagnosing orbital cellulitis, performing a CT scan is essential as it allows for an accurate assessment of the extent of the infection and any possible complications, such as the presence of an abscess or involvement of the surrounding structures, including the eye socket and sinuses. The CT scan provides a detailed image that can help differentiate orbital cellulitis from other conditions that present with similar symptoms, such as preseptal cellulitis or abscess formation.

While systemic antibiotics are crucial in the management of orbital cellulitis, they are typically initiated after the diagnosis is confirmed. Blood tests may offer additional information regarding infection but are not definitive for diagnosis. Drainage of an abscess may be necessary in cases where a localized collection of pus is identified, but obtaining imaging through a CT scan is the critical first step in confirming the diagnosis and determining the appropriate management plan.