Thompson AC, et al. - The purpose of this trial was to investigate if the diameter of Bruch’s membrane opening (BMO) could distinguish mild papilledema from pseudopapilledema through optical coherence tomography (OCT). The findings disclosed enlarged horizontal transverse diameter of BMO, among eyes with mild papilledema. Narrowing was noted as papilledema resolved. BMO and retinal nerve fiber layer (RNFL) could be utilized in combination, to assist in distinguishing mild papilledema from pseudopapilledema in children.