Enlarged optic nerve sheath diameter and crescent sign in 30 yo female patient reporting 3 months of headaches and decreased vision -> idiopathic intracranial hypertension - Dr. Stephen Alerhand @SAlerhand #Papilledema #IIH #Idiopathic #Intracranial #Hypertension #Ocular #POCUS #Clinical #Ultrasound #crescent #sign