Rapid Objective Assessment of Contrast Sensitivity and Visual Acuity With Sweep Visual Evoked Potentials and an Extended Electrode Array

Investigative Ophthalmology & Visual Science
Coralie HemptinneBruno Rossion

Abstract

Sweep visual evoked potentials (sVEPs) provide an implicit, objective, and sensitive evaluation of low-level visual functions such as visual acuity and contrast sensitivity. For practical and traditional reasons, sVEPs in ophthalmologic examinations have usually been recorded over a single or a limited number of electrodes over the medial occipital region. Here we examined whether a higher density of recording electrodes improves the estimation of individual low-level visual thresholds with sVEPS, and to which extent such testing could be streamlined for clinical application. To this end, we tested contrast sensitivity and visual acuity in 26 healthy adult volunteers with a 68-electrode electroencephalogram (EEG) system. While the most sensitive electrophysiologic response was found at the traditional medial occipital electrode Oz in a small majority of individuals, it was found at neighboring electrodes for the remaining participants. At the group level, lower spatial frequencies were also associated with right lateralized responses. More generally, visual function was evaluated more sensitively based on EEG recorded at the most sensitive electrode defined individually for each participant. Our data suggest that recording over...Continue Reading

Citations

Jun 4, 2020·Documenta Ophthalmologica. Advances in Ophthalmology·Ruth HamiltonDorothy A Thompson
May 15, 2020·Documenta Ophthalmologica. Advances in Ophthalmology·Xiaowei ZhengChengcheng Han
Aug 28, 2020·Frontiers in Human Neuroscience·Xiaowei ZhengSicong Zhang
Oct 29, 2020·Scientific Reports·Carrie GeorgesChristine Schiltz
Nov 20, 2020·Scientific Reports·Soheil M DoustkouhiSteven C Dakin
Oct 30, 2020·Eye and Brain·Marcella NebbiosoLudovico Alisi
Apr 23, 2021·Journal of Neural Engineering·Xiaowei ZhengSicong Zhang
Sep 11, 2021·Cerebral Cortex·Xiaoqian YanBruno Rossion

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