Characteristics of Pattern Visual Evoked Potential in Two Eyes with Varying Visual Acuity in One Eye and Forensic Application
10.1007/s11596-018-1885-2
- Author:
Fu-Quan JIA
1
;
Yu-Guang LIANG
;
Xin-Yuan ZHANG
;
Fang-Liang LUO
;
Yan-He XIONG
;
Long-Long CHENG
;
Ji-Hui LIU
Author Information
1. School of Forensic Medicine
- Keywords:
visual evoked potential;
decline in visual acuity;
two eyes;
forensics
- From:
Journal of Huazhong University of Science and Technology (Medical Sciences)
2018;38(2):342-348
- CountryChina
- Language:Chinese
-
Abstract:
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 3×4 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.
