Among the main domains of the questionnaire, the
best and the most suitable domain to estimate the
individual’s flicker value belongs to the main
domain of eye strain (R2 = 0.71). Among the
questions and the symptoms of the visual fatigue, the
highest amount of recognition coefficient belongs to
eye massage need (R2 = 0.54), eye pain (R2 = 0.46),
around eye pressure (R2 = 0.41), heavy eyelids (R2
= 0.40). All the four mentioned symptoms are the
sub-domains of the eye strain. Besides, it could be
claimed that controlling the effective factors on the
eye strain, VDT users’ visual fatigue could also be
controlled, significantly. It could also be mentioned
that, the first symptoms of VDT users’ visual fatigue
belong to the main domain of eye strain.
Multiple-linear regression test was used to determine
the regression equation and also to connect the main
domain variation of questionnaire and flicker value
changes. The equation’s recognition coefficient
(relation 1) was 0.853, which proved to be