Assessment of visual disability using visual evoked potentials

Assessment of visual disability using visual evoked potentials

BACKGROUND The purpose of this study is to validate the use of visual evoked potential (VEP) to objectively quantify visual acuity in normal and amblyopic patients, and determine if it is possible to predict visual acuity in disability assessment to register visual pathway lesions. METHODS A retrospective chart review was conducted of patients diagnosed with normal vision, unilateral amblyopi...

Author ' s response to reviews Title : Assessment of visual disability using visual evoked potentials

Feature Extraction of Visual Evoked Potentials Using Wavelet Transform and Singular Value Decomposition

Introduction: Brain visual evoked potential (VEP) signals are commonly known to be accompanied by high levels of background noise typically from the spontaneous background brain activity of electroencephalography (EEG) signals. Material and Methods: A model based on dyadic filter bank, discrete wavelet transform (DWT), and singular value decomposition (SVD) was developed to analyze the raw data...

Possible Long Term Effects of Chemical Warfare Using Visual Evoked Potentials

Some studies have already addressed the effects of occupational organic solvent exposure on the visually evoked potentials (VEPs). Visual system is an important target for Sulphur Mustard (SM) toxicity. A number of Iranian victims of Sulphur Mustard (SM) agent were apprehensive about the delay effect of SM on their vision and a possible delay effect of SM on their visual cortex. This investigat...

Objective assessment of visual attention in mild traumatic brain injury (mTBI) using visual-evoked potentials (VEP).

PURPOSE To quantify visual attention objectively using the visual-evoked potential (VEP) in those having mild traumatic brain injury (mTBI) with and without a self-reported attentional deficit. RESEARCH DESIGN AND METHODS Subjects were comprised of 16 adults with mTBI: 11 with an attentional deficit and five without. Three test conditions were used to assess the visual attentional state to qu...