The Exact Estimation of Visual Acuity by VEP Technology: A Report of 726 Cases of Eye Injury

Author: RAO GUANGXUN ¹ ; WU BINGWEI ; ZHANG LINGLI
Author Information

1. Faculty of Forensic Medicine,Tongji Medical College,Huazhong University of Science and Technology,Wuhan 430030,China
Keywords: clinical forensic medicine; visual evoked potentials; visual acuity,least signal visual angle; amplitude and lateny of P100
From: Journal of Huazhong University of Science and Technology (Medical Sciences) 2010;30(1):138-140
CountryChina
Language:Chinese
Abstract: This study explored the accuracy of using visual evoked potentials (VEP) technology for visual acuity estimation. The enrolled 726 patients with post-traumatic unilateral decrease in visual acuity included the injured eyes served as the experimental group, and the healthy eyes as the control group. The least signal visual angle (LSVA), and amplitude and latency of P100 were chosen as test indexes. The results under different experimental conditions were recorded by PRVEP technology. All data collected were processed and analyzed by SPSS software. The results showed that the coincidence between subjective and VEP visual acuity was 96.7% in control group, but there was very significant difference in experimental group. It was concluded that with the regression formulation for the amplitude of P100 and vision under LSVA, visual acuity can be estimated more accurately and impartially.