The effect of change of check size and wavelength of stimulus on visual-evoked potential parameters
Purpose of the study The present study was conducted to evaluate the effect of change of wavelength of flash stimulus and change of check size on the parameters of the visual-evoked potential (VEP) amplitude and latency in normal individuals. Participants and methods The study included 300 eyes of 1...
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2016-01-01
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| Series: | Delta Journal of Ophthalmology |
| Subjects: | |
| Online Access: | http://www.djo.eg.net/article.asp?issn=1110-9173;year=2016;volume=17;issue=2;spage=73;epage=79;aulast=Abdelkader |
| _version_ | 1818588906151477248 |
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| author | Mona Abdelkader |
| author_facet | Mona Abdelkader |
| author_sort | Mona Abdelkader |
| collection | DOAJ |
| description | Purpose of the study
The present study was conducted to evaluate the effect of change of wavelength of flash stimulus and change of check size on the parameters of the visual-evoked potential (VEP) amplitude and latency in normal individuals.
Participants and methods
The study included 300 eyes of 150 healthy study participants with age range of 20–45 years. They were exposed to a flash visual-evoked potential (FVEP) with white light and blue color, and to a pattern reversal visual-evoked potential with checks subtending visual angles of 15, 30, 60, and 120 min of arc. The measured data were statistically analyzed and summarized by histograms. The interindividual and intraindividual variability in latencies and amplitudes for FVEP were assessed using the coefficient of variation.
Results
There were statistically significant differences between blue and white FVEP latencies, whereas there were no statistically significant differences between white and blue FVEP amplitudes. Blue FVEP had less interindividual and intraindividual variability. There was a statistically significant difference in latencies between different check sizes.
Conclusion
Monochromatic FVEP was preferred than white, as there were minimal interindividual and intraindividual variations of latencies and amplitudes. The most preferred check size in pattern VEP was 120′. |
| first_indexed | 2024-12-16T09:32:11Z |
| format | Article |
| id | doaj.art-4304bc2b13a84000ab4a246e6d753051 |
| institution | Directory Open Access Journal |
| issn | 1110-9173 2090-4835 |
| language | English |
| last_indexed | 2024-12-16T09:32:11Z |
| publishDate | 2016-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Delta Journal of Ophthalmology |
| spelling | doaj.art-4304bc2b13a84000ab4a246e6d7530512022-12-21T22:36:29ZengWolters Kluwer Medknow PublicationsDelta Journal of Ophthalmology1110-91732090-48352016-01-01172737910.4103/1110-9173.189469The effect of change of check size and wavelength of stimulus on visual-evoked potential parametersMona AbdelkaderPurpose of the study The present study was conducted to evaluate the effect of change of wavelength of flash stimulus and change of check size on the parameters of the visual-evoked potential (VEP) amplitude and latency in normal individuals. Participants and methods The study included 300 eyes of 150 healthy study participants with age range of 20–45 years. They were exposed to a flash visual-evoked potential (FVEP) with white light and blue color, and to a pattern reversal visual-evoked potential with checks subtending visual angles of 15, 30, 60, and 120 min of arc. The measured data were statistically analyzed and summarized by histograms. The interindividual and intraindividual variability in latencies and amplitudes for FVEP were assessed using the coefficient of variation. Results There were statistically significant differences between blue and white FVEP latencies, whereas there were no statistically significant differences between white and blue FVEP amplitudes. Blue FVEP had less interindividual and intraindividual variability. There was a statistically significant difference in latencies between different check sizes. Conclusion Monochromatic FVEP was preferred than white, as there were minimal interindividual and intraindividual variations of latencies and amplitudes. The most preferred check size in pattern VEP was 120′.http://www.djo.eg.net/article.asp?issn=1110-9173;year=2016;volume=17;issue=2;spage=73;epage=79;aulast=Abdelkaderamplitudeflash visual-evoked potentiallatencymonochromatic flash visual-evoked potentialpattern visual-evoked potential |
| spellingShingle | Mona Abdelkader The effect of change of check size and wavelength of stimulus on visual-evoked potential parameters Delta Journal of Ophthalmology amplitude flash visual-evoked potential latency monochromatic flash visual-evoked potential pattern visual-evoked potential |
| title | The effect of change of check size and wavelength of stimulus on visual-evoked potential parameters |
| title_full | The effect of change of check size and wavelength of stimulus on visual-evoked potential parameters |
| title_fullStr | The effect of change of check size and wavelength of stimulus on visual-evoked potential parameters |
| title_full_unstemmed | The effect of change of check size and wavelength of stimulus on visual-evoked potential parameters |
| title_short | The effect of change of check size and wavelength of stimulus on visual-evoked potential parameters |
| title_sort | effect of change of check size and wavelength of stimulus on visual evoked potential parameters |
| topic | amplitude flash visual-evoked potential latency monochromatic flash visual-evoked potential pattern visual-evoked potential |
| url | http://www.djo.eg.net/article.asp?issn=1110-9173;year=2016;volume=17;issue=2;spage=73;epage=79;aulast=Abdelkader |
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