Motion Perimetry in Idiopathic Intracranial Hypertension

Patients with objective evidence of visual loss (e.g. optic disc pathology, relative afferent pupillary defect) may have normal conventional automated perimetry, This may be due to the network architecture at both ends of the sensory visual system. When networks are damaged, efficiency of a task may be the only deficit. To test visual efficiency we measured subject's reaction time and precision of localizing a stimulus in addition to and simultaneously with their stimulus detection threshold. We tested the hypothesis: patients with papilledema due to idiopathic intracranial hypertension (IIH) will have motion size threshold deficits, prolongation in reaction times and increased localization errors with threshold automated motion perimetry.