Where is preseptal cellulitis?

Skin around the eye: Preseptal cellulitis is a skin infection of the eyelids that approaches, but doesn't enter the eye socket. The septum is a soft tissue barrier between the eyelid skin and the socket. If the infection breaks through the septum, it is an orbital cellulitis, which is much more serious as it can lead to vision loss or worse.

Preseptal cellulitis: This involves layers in front of the septum, which are skin and muscle.