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KMID : 0381319910300020053
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Korean Journal of Occupational Health
1991 Volume.30 No. 2 p.53 ~ p.57
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Distribution Form of Near Point Distance for Bothe Eyes
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구정완/Koo, Jung Wan
오민화/이승한/Oh, Min Hwa/Lee, Seung Han
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Abstract
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Near point distance for both eyes of 71 healthy subjects, who had no special eye conditions, were measured in order to clarify their distribution form and to select a measure that is suited to continuous observation of visual fatigue of VDT workers.
The results were as follows :
1. Near point distance for both eyes (appear, disappear) followed normal distribution only after natural log-transformation(Shapiro-Wilk test).
2. The variance and the coefficient of variation of near point distance (appear) were 0.04 and 4.13, respectively, while they were 0.08 and 6.30 in near point distance (disappear). The findings suggested that near point distance (appear) could be a preferable measure to near point distance (disappear) in the sequential monitoring of visual fatigue.
3. The mean near point distance (appear, disappear) for both eyes of study subjects were 138, 82 mm in the age group of 20 29 years and were 156, 97 mm in the age group of 30 39 years, respectively.
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