VEP鉴定伪盲眼的临床法医学研究

Clinical forensic investigation of VEP in identifying simulated blindness

目的:探讨VEP技术在鉴别伪盲、评价伪盲眼实际视力水平方面的应用价值。方法:选取65例眼外伤后单眼盲或单眼低视力的患者为实验对象,将65只伤眼作为实验组,65只健眼作为对照组,分别行VEP检查。在VEP检查时,受检眼依次接受视角为30′、22′、11′、5′、3′的视觉刺激。结果:患眼主观视力与VEP视力不相符者48人,伪盲检出率为73.8%;对照组健眼VEP视力与主观视力符合率可达90.8%。结论:VEP技术能够准确评价受检眼的实际视力水平,并可为鉴别伪盲的法医学应用方面提供可靠依据。

AIM： To approach the value of VEP technology to identify simulated blindness and to evaluate their veridical visual acuity. METHODS： We chose 65 patients with luscitas or ocellanae low vision as subjects in this experiment. Sixtyfive injury eyes were in experimental group and 65 healthy eyes in control group. All eyes were examined by VEP with visual stimulus of the visual angel of 30′,22′,11′,5′, 3′. RESULTS： There were 48 eyes which subjective visual acuity could not match with their VEP visual acuity, and the detection rate of simulated blindness was 73.8%. The coincidence was 90.8% between subjective and VEP visual acuity in the control group. CONCLUSION. VEP technology can estimate visual acuity of examined eyes＇ correctly. It can provide reliable basis for forensic application to identify simulated blindness.