With age the<unk>  may weaken, and as a result<unk>  fat may herniate forwards. The operation to correct this is called blepharoplasty. The<unk>  is an important landmark in distinguishing between<unk>  cellulitis (inside the<unk>  and periorbital cellulitis (outside the<unk> .
Orbital septum
Lacrimal groove
Ateronon
Optic recess
Hemotympanum
Lacrimal sac
Ranula
Syrinx 