Optical coherence tomography OCT has become a standard imaging study for patients with optic neuropathies and related afferent visual pathway disorders. This lecture provides a detailed overview of OCT findings in the setting of papilledema vs. pseudopapilledema. In addition, the utilization of OCT as a surrogate biomarker of neurologic disease is reviewed as related to multiple sclerosis, Alzheimer's disease, Parkinson's' disease, and traumatic brain injury. Dr. Messner's predominant research interests include vision, ocular structure, and visual-motor abnormalities with a concussion, eye movements associated with the physical act of reading, idiopathic intracranial hypertension, optic neuritis, and diabetic retinopathy, and age-related macular degeneration. He is a 23-time recipient of the “Teacher of the Year” award at the Illinois College of Optometry.

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