scholarly journals Visual acuity evaluated by pattern-reversal visual-evoked potential is affected by check size/visual angle

2012 ◽  
Vol 28 (6) ◽  
pp. 737-745 ◽  
Author(s):  
Xiping Chen ◽  
Qianqian Li ◽  
Xiaoqin Liu ◽  
Li Yang ◽  
Wentao Xia ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Visual Angle ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Pattern Reversal ◽  
Check Size ◽  
Visual Evoked

Visual Evoked potential signal processing and analysis for normal and galucomic eyes

2015 ◽  
Vol 8 (2) ◽  
pp. 2106-2121
Author(s):  
Hamed Ibrahem Abdelkader ◽  
Mona Abdelkader ◽  
Mohammed Kabeel ◽  
Malak Alya
Keyword(s):  
Evoked Potentials ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Optic Tract ◽  
Pattern Reversal ◽  
Blue Color ◽  
Check Size ◽  
Retinal Stimulation ◽  
Normal Individuals ◽  
Visual Evoked

Visual evoked potentials (VEPS) are obtained from optic tract by recording the evoked potentials generated by retinal stimulation. The flash VEP (FVEP) is used less frequently than pattern reversal VEP (PRVEP) because; it shows great variation in both latency and amplitude. The present study was undertaken to evaluate the effect of change of wavelength of flash and change of check size on the parameters of visual evoked potential (amplitude and latency) in normal individuals and glaucoma patients. The group of healthy subjects in the age of 20-45 years while the group of glaucoma subjects where  in the age of 25-50 years.  The two groups were exposed to flash VEP with white light and blue color and they also were exposed to checks subtending a visual angles of 15, 30,60 and 120 minutes of arc. The measured data were statistically analyzed and summarized by histograms. The interindividual and intraindividual in latencies and amplitudes for FVEP were assessed using  the coefficient of variation (COV). In conclusion, monochromatic flash VEP was preferred than white as there were minimal inter and intra individual variation of latencies and amplitudes. The most preferred check size in PRVEP was 120' for  the two groups.  

Effect of check size on the pattern reversal visual evoked potential

1991 ◽  
Vol 80 (3) ◽  
pp. 161-166 ◽  
Author(s):  
Shizuka Kurita-Tashima ◽  
Shozo Tobimatsu ◽  
Miyuki Nakayama-Hiromatsu ◽  
Motohiro Kato
Keyword(s):  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Pattern Reversal ◽  
Check Size ◽  
Visual Evoked

Primary Presenile Dementia: The Use of the Visual Evoked Potential as a Diagnostic Indicator

1985 ◽  
Vol 147 (5) ◽  
pp. 532-539 ◽  
Author(s):  
Graham F. A. Harding ◽  
Christine E. Wright ◽  
Arnold Orwin
Keyword(s):  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Cortical Atrophy ◽  
Control Group ◽  
Pattern Reversal ◽  
Presenile Dementia ◽  
The Difference ◽  
Pattern Reversal Stimulation ◽  
Diagnostic Indicator ◽  
Visual Evoked

The use of the flash and pattern reversal visual evoked potential (VEP) in the diagnosis of primary presenile dementia was investigated. The results from 20 patients with primary presenile dementia were compared with those from a control group of normals of equivalent age and from a control group of 20 patients with cortical atrophy but no dementia. Presenile dementia caused a slowing of the major positive (P2) component of the VEP to flash stimulation. However, the VEP to pattern reversal stimulation (P100) was of normal latency. The difference between these two latencies characterises this unusual combination of results and is found to be a more specific diagnostic indicator of primary presenile dementia than the EEG or CT scan.

Pattern-Reversal Visual Evoked Potential in Children With Congenital Zika Syndrome

2021 ◽  
Vol 58 (2) ◽  
pp. 78-83
Author(s):  
Luan F. B. Almeida ◽  
Marisa Kattah ◽  
Liana O. Ventura ◽  
Adriana L. Gois ◽  
Camilla Rocha ◽  
...  
Keyword(s):  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Pattern Reversal ◽  
Congenital Zika Syndrome ◽  
Visual Evoked

Pattern-Reversal Visual Evoked Potential on Smart Glasses

2020 ◽  
Vol 24 (1) ◽  
pp. 226-234 ◽  
Author(s):  
Rossana Terracciano ◽  
Alessandro Sanginario ◽  
Simona Barbero ◽  
Davide Putignano ◽  
Lorenzo Canavese ◽  
...  
Keyword(s):  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Pattern Reversal ◽  
Smart Glasses ◽  
Visual Evoked

Effect of Head Circumference and Gender on Pattern Reversal Visual Evoked Potential

2016 ◽  
Vol 3 (3) ◽  
pp. 107
Author(s):  
Kuldip Singh Bhatia ◽  
Anil Kumar ◽  
Ali Ahanger ◽  
Pradeep Shingal ◽  
Vijay Kumar Roy
Keyword(s):  
Head Circumference ◽  
Visual Evoked Potential ◽  
Evoked Potential ◽  
Pattern Reversal ◽  
And Gender ◽  
Visual Evoked
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