“…Only in terms of spatial resolution, LCD devices are better than PDP devices. However, most previous research has not addressed the human factor, except for current research about the degree of eyestrain caused by VDTs (Visual Display Terminals), which have been classified under the research area of ergonomics (Brandt et al, 2004;Hakkinen et al, 2002;Iwakiri et al, 2004;Kaneko and Sakamoto, 2001;Katsuyuki et al, 1996;Miyao et al, 1989;Mocci et al, 2001;Nakaishi and Yamada, 1999;Naschitz et al, 2002;Nilsen et al, 1997;Okada, 2006;Takahashi, 2006;Bergqvist, 1995;Chen and Lin, 2004;Shieh, 2000). This method can be also used when comparing LCD and PDP devices.…”