Optic disc drusen (ODD) are acellular prelaminar calcifications in the optic nerve head found in approximately 1% to 2% of the population. They are often asymptomatic, but peripheral visual field defects are common and acute vision loss, due to ischemic optic neuropathy, is known to occur. The morphology of ODD on OCT is characterized by a signal-poor core surrounded by a hyperreflective margin.1 Occasionally, this core may be associated with small hyperreflective aggregates or horizontal lines.
