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BioMed Research International
Volume 2014, Article ID 606951, 6 pages
http://dx.doi.org/10.1155/2014/606951
Research Article

Pattern Visual Evoked Potentials Elicited by Organic Electroluminescence Screen

1Department of Ophthalmology, Teikyo University School of Medicine, Kaga 2-11-1, Itabashi-ku, Tokyo 173-8605, Japan
2Matsumoto Eye Clinic, 50-2 Takagaki, Awa-cho, Awa-shi, Tokushima 771-1705, Japan
3Engineering Department, Tomey Corporation, 2-11-33 Noritakeshinmachi, Nishi-ku, Nagoya-shi, Aichi 451-0051, Japan
4National Institute of Sensory Organs, National Tokyo Medical Center, 2-5-1 Higashigaoka, Meguro-ku, Tokyo 152-8902, Japan

Received 5 December 2013; Accepted 31 May 2014; Published 14 August 2014

Academic Editor: Gianluca Coppola

Copyright © 2014 Celso Soiti Matsumoto et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose. To determine whether organic electroluminescence (OLED) screens can be used as visual stimulators to elicit pattern-reversal visual evoked potentials (p-VEPs). Method. Checkerboard patterns were generated on a conventional cathode-ray tube (S710, Compaq Computer Co., USA) screen and on an OLED (17 inches, 320 × 230 mm, PVM-1741, Sony, Tokyo, Japan) screen. The time course of the luminance changes of each monitor was measured with a photodiode. The p-VEPs elicited by these two screens were recorded from 15 eyes of 9 healthy volunteers (22.0 ± 0.8 years). Results. The OLED screen had a constant time delay from the onset of the trigger signal to the start of the luminescence change. The delay during the reversal phase from black to white for the pattern was 1.0 msec on the cathode-ray tube (CRT) screen and 0.5 msec on the OLED screen. No significant differences in the amplitudes of P100 and the implicit times of N75 and P100 were observed in the p-VEPs elicited by the CRT and the OLED screens. Conclusion. The OLED screen can be used as a visual stimulator to elicit p-VEPs; however the time delay and the specific properties in the luminance change must be taken into account.