scholarly journals Assessment of Human Visual Acuity Using Visual Evoked Potential: A Review

Sensors ◽  
2020 ◽  
Vol 20 (19) ◽  
pp. 5542
Author(s):  
Xiaowei Zheng ◽  
Guanghua Xu ◽  
Kai Zhang ◽  
Renghao Liang ◽  
Wenqiang Yan ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Visual Stimuli ◽  
Signal Acquisition ◽  
Intellectual Abilities ◽  
Detection And Diagnosis ◽  
Future Work ◽  
Acuity Test ◽  
Visual Evoked

Visual evoked potential (VEP) has been used as an alternative method to assess visual acuity objectively, especially in non-verbal infants and adults with low intellectual abilities or malingering. By sweeping the spatial frequency of visual stimuli and recording the corresponding VEP, VEP acuity can be defined by analyzing electroencephalography (EEG) signals. This paper presents a review on the VEP-based visual acuity assessment technique, including a brief overview of the technique, the effects of the parameters of visual stimuli, and signal acquisition and analysis of the VEP acuity test, and a summary of the current clinical applications of the technique. Finally, we discuss the current problems in this research domain and potential future work, which may enable this technique to be used more widely and quickly, deepening the VEP and even electrophysiology research on the detection and diagnosis of visual function.

scholarly journals The relationship between vertical kinetic visual acuity and visual evoked potential

2007 ◽  
Vol 53 (4) ◽  
pp. 615-621
Author(s):  
HIROSHI YOSHIGI ◽  
YOSHIMITSU KOHMURA ◽  
MINORU TANAKA ◽  
ATSUSHI MIZOTA
Keyword(s):  
Visual Acuity ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
The Relationship ◽  
Visual Evoked

scholarly journals Pattern and Sweep Visual Evoked Potential in the Objective Determination of Visual Acuity

2018 ◽  
Author(s):  
Mualla Hamurcu
Keyword(s):  
Visual Acuity ◽  
Correlation Analysis ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Strong Positive Correlation ◽  
Positive Correlation ◽  
Weak Positive Correlation ◽  
Snellen Chart ◽  
Sweep Visual Evoked Potential ◽  
Visual Evoked

Abstract Background: To investigate the effects of pattern visual evoked potential (pVEP) and sweep visual evoked potential (sVEP) on the accurate visual acuity (VA) measurement in adults. Methods: Medical files of 282 eyes of 141 patients who underwent VA measurement in our electrophysiology laboratory and did not undergo simulation were retrospectively analyzed. The VA was measured using the Snellen chart. Only those with a VA of higher than 1/10 on the Snellen chart were included in the study. The VA was assessed and reported by the pVEP (VA-pVEP) and sVEP test (VA-sVEP). The correlation analysis was performed using the Pearson correlation analysis. Results: Of 141 patients, 92 were males and 49 were females with a mean age of 37.7±18.4 years. There was a strong positive correlation between the VA values obtained from both eyes by pVEP (VA-pVEP) (r=0.858, p<0.001). There was a weak positive correlation (r=0.267, p<0.001) between the VA measured by the Snellen chart and the VA measured by the sVEP (VA-sVEP). A weak positive correlation was found for the VA-pVEP and VA-sVEP (r=0.313, p<0.001). Conclusions: For the measurement of the degree of the VA, it seems reasonable to use pVEP initially, while sVEP should be used in cases with short attention span and those who are non-cooperative and in infants.

A comparison of the performance of three visual evoked potential-based methods to estimate visual acuity

2012 ◽  
Vol 126 (1) ◽  
pp. 45-56 ◽  
Author(s):  
Anne Kurtenbach ◽  
Hana Langrová ◽  
Andre Messias ◽  
Eberhart Zrenner ◽  
Herbert Jägle
Keyword(s):  
Visual Acuity ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Visual Evoked

scholarly journals Measurement of visual acuity in Beagle dog by visual evoked potential with pattern stimulation

2018 ◽  
Vol 80 (11) ◽  
pp. 1758-1761
Author(s):  
Seiya MAEHARA ◽  
Yoshiki ITOH ◽  
Yosuke ITO ◽  
Miri HAYASHI ◽  
Arisa MASUKO
Keyword(s):  
Visual Acuity ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Beagle Dog ◽  
Pattern Stimulation ◽  
Visual Evoked

Characteristics of Pattern Visual Evoked Potential in Two Eyes with Varying Visual Acuity in One Eye and Forensic Application

2018 ◽  
Vol 38 (2) ◽  
pp. 342-348 ◽  
Author(s):  
Fu-quan Jia ◽  
Yu-guang Liang ◽  
Xin-yuan Zhang ◽  
Fang-liang Luo ◽  
Yan-he Xiong ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Forensic Application ◽  
Pattern Visual Evoked Potential ◽  
Visual Evoked

scholarly journals Brain–Computer Interface Speller Based on Steady-State Visual Evoked Potential: A Review Focusing on the Stimulus Paradigm and Performance

2021 ◽  
Vol 11 (4) ◽  
pp. 450
Author(s):  
Minglun Li ◽  
Dianning He ◽  
Chen Li ◽  
Shouliang Qi
Keyword(s):  
Steady State ◽  
Information Transfer ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Brain Computer Interface ◽  
Visual Stimuli ◽  
Computer Interface ◽  
Visual Fatigue ◽  
Factors Influencing ◽  
Visual Evoked

The steady-state visual evoked potential (SSVEP), measured by the electroencephalograph (EEG), has high rates of information transfer and signal-to-noise ratio, and has been used to construct brain–computer interface (BCI) spellers. In BCI spellers, the targets of alphanumeric characters are assigned different visual stimuli and the fixation of each target generates a unique SSVEP. Matching the SSVEP to the stimulus allows users to select target letters and numbers. Many BCI spellers that harness the SSVEP have been proposed over the past two decades. Various paradigms of visual stimuli, including the procedure of target selection, layout of targets, stimulus encoding, and the combination with other triggering methods are used and considered to influence on the BCI speller performance significantly. This paper reviews these stimulus paradigms and analyzes factors influencing their performance. The fundamentals of BCI spellers are first briefly described. SSVEP-based BCI spellers, where only the SSVEP is used, are classified by stimulus paradigms and described in chronological order. Furthermore, hybrid spellers that involve the use of the SSVEP are presented in parallel. Factors influencing the performance and visual fatigue of BCI spellers are provided. Finally, prevailing challenges and prospective research directions are discussed to promote the development of BCI spellers.

Implementation of an Intelligent Telephone Dialing System Based on the Control of Steady-State Visual Evoked Potentials

2013 ◽  
Vol 662 ◽  
pp. 807-811
Author(s):  
Qing Guo Wei ◽  
Zhuo Wang ◽  
Zong Wu Lu
Keyword(s):  
Steady State ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Processing System ◽  
Signal Acquisition ◽  
Accuracy Rate ◽  
Real Time Processing ◽  
Practical Applications ◽  
Visual Stimulator ◽  
Visual Evoked

With the development of brain-computer interface (BCI) technology, researchers are now attempting to put current BCI techniques into practical applications. This paper proposes an intelligent telephone dialing system controlled by a steady-state visual evoked potential (SSVEP) based BCI. This dialing system consists of four parts: a visual stimulator, EEG signal acquisition and amplification, PC real-time processing system and an auto telephone dialing module. Seven volunteers participated in an experiment designed to test the performance of the dialing system. The experimental results suggested that all subjects succeeded in the phone dialing with mean accuracy rate of 94.5% and mean bit rate of 33.31 bit/min.

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