Characteristics of Pattern Visual Evoked Potential in Two Eyes with Varying Visual Acuity in One Eye and Forensic Application
Characteristics of Pattern Visual Evoked Potential in Two Eyes with Varying Visual Acuity in One Eye and Forensic Application作者机构：School of Forensic Medicine China Medical University Shenyang 110122 China Department of Forensic Medicine Inner Mongolia Medical University Hohhot 010059 China Beijing Scales Forensic Center Beijing 100025 China
出 版 物：《Current Medical Science》 (当代医学科学（英文）)
年 卷 期：2018年第38卷第2期
页 面：342-348页
核心收录：
学科分类：0710[理学-生物学] 1001[医学-基础医学(可授医学、理学学位)] 0703[理学-化学] 10[医学]
基 金：National Basic Research Program of China (973 Program) (2016YFC0800701-4-2)
主 题：visual evoked potential decline in visual acuity two eyes forensics
摘 要：In this study, we aimed to study the pattern visual evoked potentials （P-VEPs） in two eyes with varying visual acuity in one eye and to provide an objective estimation of visual acuity by comparing P-VEPs in one and two eyes. Thirty subjects were chosen, who had one eye with an acuity of 5.0, 4.85, 4.6, 4.0, or scieropia and obstructed vision and the other eye with an acuity of 5.0, respectively. P-VEPs were detected under the large grating stimuli at 3x4 spatial frequency, moderate grating stimuli （12× 16 spatial frequency） and small grating stimuli （48×64 spatial frequency）. Under large grating stimuli, there was no significant difference in P100 peak latency between the groups, nor was there a significant difference between the amplitude of two eyes and the amplitude of one normal-vision eye. Under moderate and small grating stimuli, there was a significant difference in P100 peak latency between the group with both eyes having an acuity of 5.0 and the group with visual acuity below 4.0 in one eye. There was a significant difference in P100 amplitude between the group with visual acuity of 5.0 in both eyes and the group with one normal-vision eye. There was no significant difference in the amplitude of two eyes and the amplitude of one normal-vision eye between any other two groups. In forensic identification, characteristics and variability of P-VEPs in one and two eyes can be used to identify malingering or decline in visual acuity.
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