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KMID : 0361420160400020334
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Journal of Korean Academy of Rehabilitation Medicine
2016 Volume.40 No. 2 p.334 ~ p.340
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Visual Evoked Potential Using Head-Mounted Display Versus Cathode Ray Tube: A Pilot Study
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Choi Hyo-Seon
Im Sang-Hee
Kim Yong-Kyun
Lee Sang-Chul
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Abstract
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Objective: To present a new stimulation method based on the use of a head-mounted display (HMD) during pattern reversal visual evoked potential (PR-VEP) testing and to compare variables of HMD to those of conventional cathode ray tube (CRT).
Methods: Twenty-three normal subjects without visual problems were recruited. PR-VEPs were generated using CRT or HMD stimuli. VEP outcome measures included latencies (N75, P100, and N145) and peak-to-peak amplitudes (N75?P100 and P100?N145). Subjective discomfort associated with HMD was determined using a self-administered questionnaire.
Results: PR-VEPs generated by HMD stimuli showed typical triphasic waveforms, the components of which were found to be correlated with those obtained using conventional CRT stimuli. Self-administered discomfort questionnaires revealed that HMD was more comfortable in some aspects. It allowed subjects to concentrate better than CRT.
Conclusion: The described HMD stimulation can be used as an alternative to the standard CRT stimulation for PR-VEPs. PR-VEP testing using HMD has potential applications in clinical practice and visual system research because HMD can be used on a wider range of subjects compared to CRT.
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KEYWORD
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Visual evoked potentials, Head-mounted display, Cathode ray tube
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