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[Application of the Virtual Reality-Pattern Visual Evoked Potential in Forensic Visual Acuity Evaluation].

W Y Tang1, J M Chen2, R R Wang3

  • 1Basic Medical College of Jiamusi University, Jiamusi 154007, Heilongjiang Province, China.

Fa Yi Xue Za Zhi
|February 7, 2021
PubMed
Summary

This study found that virtual reality-pattern visual evoked potential (VR-PVEP) testing in monocular mode offers higher amplitude and reliability for forensic visual acuity evaluation compared to binocular mode. This method improves efficiency and overcomes fixation issues.

Keywords:
forensic medicine; virtual reality; pattern visual evoked potential; visual acuity; participants

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Area of Science:

  • Ophthalmology
  • Neuroscience
  • Forensic Science

Background:

  • Visual acuity evaluation is crucial in forensic clinical settings.
  • Traditional methods may be limited by factors like poor fixation.
  • Pattern Visual Evoked Potential (PVEP) offers an objective measure.

Purpose of the Study:

  • To evaluate a virtual reality-based PVEP (VR-PVEP) method for forensic visual acuity assessment.
  • To compare the efficacy of monocular versus binocular stimulation modes in VR-PVEP.
  • To determine the suitability of VR-PVEP for reliable and efficient clinical application.

Main Methods:

  • Thirty-four volunteers underwent induced refractive myopia.
  • Visual acuity was set to normal in one eye and moderately impaired in the other.
  • VR-PVEP tests were conducted in both monocular and binocular modes across four spatial frequencies (8x8, 16x16, 24x24, 32x32).

Main Results:

  • Statistically significant differences in P100 wave amplitude between monocular and binocular modes were observed at spatial frequencies of 16x16, 24x24, and 32x32 (P<0.05).
  • The amplitude of the P100 wave was consistently higher in monocular mode compared to binocular mode for the same eye.
  • A moderate correlation was found between P100 wave amplitudes in monocular and binocular modes.

Conclusions:

  • VR-PVEP testing, particularly in monocular mode, enhances the reliability of visual acuity evaluations in forensic contexts.
  • This method effectively addresses challenges associated with poor fixation.
  • VR-PVEP significantly reduces testing time and boosts overall work efficiency in forensic identification practices.