Application of the Virtual Reality-Pattern Visual Evoked Potential in Forensic Visual Acuity Evaluation.
10.12116/j.issn.1004-5619.2020.06.004
- Author:
Wei Yi TANG
1
;
Jie Min CHEN
2
;
Rong Rong WANG
3
;
Si Lei TAN
2
;
Dong Mei LIU
2
;
Xiao Ying YU
2
;
Hui Hua LI
3
;
Qun Feng ZHANG
3
;
Yan Liang SHENG
1
;
Wen Tao XIA
1
Author Information
1. Basic Medical College of Jiamusi University, Jiamusi 154007, Heilongjiang Province, China.
2. Shanghai Key Laboratory of Forensic Medicine, Key Laboratory of Forensic Science, Ministry of Justice, Shanghai Forensic Service Platform, Academy of Forensic Science, Shanghai 200063, China.
3. Shanghai NCC Electronic Corp., Ltd, Shanghai 200063, China.
- Publication Type:Journal Article
- Keywords:
forensic medicine;
virtual reality;
pattern visual evoked potential;
visual acuity;
participants
- MeSH:
Adult;
Evoked Potentials, Visual;
Eye;
Female;
Humans;
Male;
Reproducibility of Results;
Virtual Reality;
Visual Acuity;
Young Adult
- From:
Journal of Forensic Medicine
2020;36(6):762-766
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore a kind of visual evoked potential test equipment and method that is more suitable for the application of forensic clinical visual acuity evaluation. Methods Thirty-four volunteers （68 eyes） were selected, including 15 males and 19 females, aged between 20 and 40 years. Test lenses were placed before the tested eyes of volunteers to induce refractive myopia with insert method, and the diopter lenses were adjusted so that the visual acuity level of one eye of volunteers was above 0.8, and the visual acuity of the other eye was at moderate damage level （<0.3 and ≥0.1）. The tests were carried out under the binocular simultaneous asynchronous stimulation mode （hereinafter referred to as "binocular mode"） and monocular separate stimulation mode （hereinafter referred to as "monocular mode"） of virtual reality-pattern visual evoked potential （VR-PVEP）, and the amplitude of PVEP of volunteers under the two modes was compared at four spatial frequencies of 8×8, 16×16, 24×24 and 32×32. Results The differences in the amplitude of P100 wave between monocular and binocular modes at 8×8 spatial frequency had no statistical significance and the differences in amplitude of P100 wave between monocular and binocular modes at 16×16, 24×24, and 32×32 spatial frequencies had statistical significance （P<0.05）. The amplitude of the same eye in monocular mode was higher than that in binocular mode. Through correlation analysis, it was found that the amplitude of P100 wave in monocular mode was moderately correlated with amplitude of P100 wave in binocular mode. Conclusion In forensic identification practice, VR-PVEP is helpful for overcoming the disturbance of poor fixation, and to increase the reliability of PVEP evaluation results. It can greatly shorten the detection time of PVEP and improve work efficiency.
