Diagnosis of periorbital gas on ocular ultrasound after facial trauma.

Ocular trauma can occur from isolated facial trauma or in major blunt trauma such as motor vehicle accidents or falls. Despite the etiology of the injury, a thorough evaluation is important but may often be difficult if severe swelling is present. Recently, emergency ultrasound has seen the use of ocular ultrasound to evaluate visual changes and trauma. Literature suggests that unsuspected and difficult to diagnose pathology may be easily detected on ultrasound of the orbit. We present 3 cases of isolated facial trauma in which routine evaluation with ocular ultrasound led to the discovery of periorbital air with one patient having air insufflating the upper lid of the affected side.