Orbital cellulitis: Axial ce. CT image in a soft tissue window showing opacification of the left ethmoid sinuses (E), infiltration and thickening of the eyelid (short white arrow) indicative of preseptal cellulitis, and infiltration of the postseptal/orbital fat (long white arrow) adjacent to the lamina papyracea (black arrow) indicative of orbital cellulitis and possibly early subperiosteal abscess