Study of Eye Fatigue on Vertical and Horizontal Writings of Newspapers

ABSTRACT

Authors performed a comparison study of eye fatigue after full 60 minutes continuous reading the prepared daily newspapers which were differently arranged in various writings vertical style or horizontal style, under the illuminations (50, 200 and 1000 Lux)and two kinds of light source(fluorescent lamp and glow lamp), by the flicker fusion test. Healthy persons(8 for young ages: 20~29 yr. old, and 8 for old, ages: 50~59 yr. old) were carefully selected for the purpose of this study. Results are as follows: 1. There is no significant difference in flicker values between vertical and horizontal writings. 2. Flicker values after one hour continuous reading under the illuminlition of 50 and 1000 Lux were significantly decreased in comparison to 200 Lux illumination in old age. (P.<0.05). 3. Flicker values were significantly decreased after 50 minutes continuous reading the newspapers in all conditions, such as style of writing, light sources and illuminations.(p<0.05). 4. Different light sources such as fluorescent lamp and glow lamp also showed no significant differences in inducing eye fatigue. 5. There is no significant difference in inducing eye fatigue between young(20~29 yr. old) and old(50~59 yr. old) age group.