Diagnosis: Orbital blowout fracture

"Blowout fracture" occurs when a force is applied to the globe (ball, fist, bottle) which exceeds the ability of the orbital walls to contain it. The weakest portion of the orbit is the floor, and is weaker than the globe itself. Fat, blood and extra-ocular muscles may enter the maxillary sinus throught the defect. Patients may have diplopia from EOM entrapment or peri- orbital edema. They may also have anesthesia of the lateral nose, lower eyelid and upper lip from injury to the infra-orbital nerve, a branch of the maxillary division of the trigeminal nerve (V2).