Anomalous optic disc elevation associated with ultrasonographic evidence of increased subarachnoid fluid

The presence of increased subarachnoid fluid around the optic nerve as meas ured by ultrasound has been shown to be associated with elevated intracrani al pressure, as well as a number of other conditions. This finding has prov ed useful for distinguishing optic disc elevation secondary to papilledema from disc elevation attributable to other causes. This report describes a p atient with anomalous optic disc elevation and increased subarachnoid fluid around the optic nerve.