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Korean Journal of Epidemiology 1991;13(1): 52-62.
A study on time-series changes of visual acuity and related factorsfor high school students in Seoul.
Jiyeon Park, Il Soon Kim, Hee Choul Oh
Abstract
The purpose of this study was to observe the ten-year changes of visual acuity and to determine the factors of reducing visual acuity-especially learning musical instrument-. For the study, data from ten-years health record of one high school in Seoul that checked by school yearly and self-written questionnaire was analysed. The subject of study were 314 (150 : male, 164 : female). The results of study were summarized as follows. 1. The average visual scuity of female was more reduced than male by aging during past ten years. The oneset of low average visual acuity that defined less than 1.0 in this study was third grade of elemantary school in femals and second grade of middle school in male. In male, the rate of low visual acuity increased by aging but in female the rate fluctuated. 2. The propotion of low visual acuity at third grade of high school was 54.0% in male, 74.0% in female. 3. The performance of middle and high school was associated with low visual acuity but not statistically significant in female, other general factors of visual acuity were statistically insignificant. 4. In family history of visual acuity, low visual acuity were associated with putting on mother’s and brother’s glasses but not statistically significant. 5. The group of low visual acuity at third grade of high school was longer in learning musical instrument than group of normal visual acuity but not statistically significant. 6. The average visual acuity of group learning musical instrument was lower than group not learnig. The onset of low average visual acuity of group learning musical instrument was earlier than group not learning. 7. By the period of learning musical instrument, rate of low visual acuity were increased and statistically significant, but by the level of operating instrument was not statistically significant. To sum up the results, visual acuity was gradually reduced by aging and the onset of low visual acuity of female was earlier than male. At all age the average of female’s visual acuity was lower than male’s. The onset of low visual acuity of group learning musical instrument was earlier than group not learning musical instrument and the average visual acuity of group learning musical instrument was lower than group not learning musical instrument.


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