Normative values of visual evoked potentials in Northeastern of Iran

Mahjoob, M. and Heravian Shandiz, J. and Mirzajani, A. and Ehsaei, A. and Jafarzadehpur, E. (2019) Normative values of visual evoked potentials in Northeastern of Iran. Journal of Optometry, 12 (3). pp. 192-197.

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Purpose: Visual evoked potentials (VEPs) provide important diagnostic information related to the functional integrity of the visual pathways. The aim of this study was to establish normative values of different components of pattern reversal VEPs on Iranian normal adult subjects. Methods: Monocular and binocular pattern reversal VEPs were recorded on 59 healthy participants (22.55 ± 3.79 years old) using the Roland RETI system for two check sizes of 15 and 60 min of arc. The measured VEP components were the latencies of N75, P100, N135 and amplitude of N75–P100. Results: Repeated measures ANOVA showed that viewing eye condition has a significant impact on the amplitude of N75–P100 (P < 0.001, F = 13.89). Also, the effect of check size on the latencies of N75, P100, N135, amplitude of N75–P100 (P ≤ 0.010), as well as the intraocular difference of P100 latency and amplitude N75–P100 (P = 0.007) was significant. More specifically, the amplitude of N75–P100 in both check sizes significantly differed between gender groups (P < 0.023). Conclusion: According to the results of this study, VEPs components are affected by the stimulus size, monocular and binocular recording conditions and gender. Therefore, it is necessary to determine the normative values of VEPs in each population, so that the results could be used in clinical studies. © 2019 Spanish General Council of Optometry

Item Type: Article
Additional Information: Export Date: 16 February 2020 Correspondence Address: Heravian Shandiz, J.; Department of Optometry, School of Paramedical Sciences, Mashhad University of Medical SciencesIran; email:
Uncontrolled Keywords: N75 latency N75–P100 amplitude P100 latency Pattern reversal visual evoked potentials adult analysis of variance article controlled study female gender human human experiment Iran major clinical study male stimulus visual evoked potential adolescent binocular vision monocular vision physiology reaction time reference value visual system young adult Evoked Potentials, Visual Humans Reference Values Vision, Binocular Vision, Monocular Visual Pathways
Subjects: WW Ophthalmology
Divisions: Mashhad University of Medical Sciences
Depositing User: mr lib1 lib1
Date Deposited: 21 Jun 2020 07:34
Last Modified: 21 Jun 2020 07:34

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