UIWRSO Visual Neurophysiology Service

Title UIWRSO Visual Neurophysiology Service
Author, Co-Author
Program Number
Mile High 1
Abstract The UIWRSO Visual Neurophysiology Service (VNS) is a unique clinical service directed at detection, diagnosis and monitoring of challenging visual, neurological and systemic conditions affecting all levels of the human visual system. VNS capabilities include comprehensive visual electro-diagnostic testing administered according to standards set forth by the International Society for the Clinical Electrophysiology of Vision (ISCEV; http://www.iscev.org/standards/). VNS testing includes the electro-oculogram (EOG) to objectively assess the RPE and outer retinal function; full-field flash electroretinograms (ERGs) to detect outer and middle retinal dysfunction under daytime and nighttime viewing conditions; multi-focal ERGs (mfERGs) to detect focal outer and middle retinal dysfunction (e.g. chloroquine retinopathy), pattern ERGs to assess inner retina and optic nerve, as well as flash and pattern visual evoked potentials (VEPs) to asses central visual function at the level of the visual cortex. Additional testing includes dark adaptometry, glare disability, multiple large and small target contrast sensitivity testing, as well as low luminance assessment. The VNS utilizes multiple measures of color vision to detect and diagnose both type and severity of hereditary and acquired color deficiency. Multiple pseudo-isochromatic plate (PIP) tests, red-green and blue-yellow anomaloscopes, hue arrangement tests (normal and de-saturated D15, FM100 Hue), lantern signal light testing, and the computer-based Cone Contrast Test, used USAF-wide, comprise a unique, formative battery for color vision diagnosis. Importantly, all referral patients are thoroughly evaluated by 4th Year Interns and the VNS chief to identify optical/functional and/or organic bases for visual loss, beginning with meticulous refraction, binocular vision assessment, as well as visual fields, OCT, ultrasound, and other tests as indicated. In addition to clinical care, the VNS actively participates in clinical research such as color VEPs and ERGs. This illustrative poster will describe VNS capabilities including case examples and description of ongoing research.
Affiliation of Co-Authors