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KMID : 0360219710120020017
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Journal of the Korean Ophthalmological Society
1971 Volume.12 No. 2 p.17 ~ p.22
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Refraction in High School Students(Ⅰ)
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金仁順/Kim, In Soon
金洪福/李莊宇/郭英世/鄭秀子/洪淳珏/Kim, Hong Bok/Lee, Jang Woo/Kwack, Young Sae/Chung, Soo Ja/Hong, Soon Kak
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Abstract
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This study was planned to determine the subjective and objective refraction under Mydrin P (Sansei Do Pham. Co.) among 758 Korean high school girls in Seoul area age of 12 to 18 years.
Brightness (illumination) of 6 class rooms out of 30 in junior high school & 11 class rooms out of 24 in senior high school was measured with a sight meter (Western model 703-60, type 7, Western Co.) and a sun light illumination meter (Western model 756, Weston Co.).
1. Among 758 high school girls, error was 80.34% and emm.etropia 19.66%.
2. As to the distribution of refractive erros, 30.02% was hyperopic refractive error and 69.98% was myopic refractive error.
3. The incidence of each refractive errors was the following order: hyperopia 15.44%, myopia 37.40%, compound myopic astigmatism 15.04%, compound hyperopic astigmatism 5.54%, simple myopic astigmatism 3.23%, simple hyperopic astigmatism 2. 9%, mixed, astigmations 0.73%.
5.The incidence of refractive errors, in relation to age reveals the myopic refractive. error increases from 37.35% at the age of 12 years reaching to 97.06% at the age of 18 years, while the hyperopic refractive error decreases from´ 62.65% at the age of 12 years decreasing to 2.9400 at the age of 18 years.
6. Emmetropia was most frequent-at the age of 16 years and there after tends to decrease.
7. Hyperopic refractive error under 1. 00D was 23. 99% and myopic refractive error under 1. 00 D was 26.62%.
8. As to the type of astigmatism, "with the rule" was 52.88%, "against rule" 40.14%, "oblique" 4.33% and mixed astigmatism 2.64% only.
9. The brightness of classrooms reveals averaing 75.5 F.C. in junior high school & 30.2 F. C. in senior high school. The day light factor measured at the same time was average 6.2% in junior high school and 1.8% in senior high school.
The balance of illumination measured at the sametime- was average 69.8% in junior high school and 52. 6% in senior high school.
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KEYWORD
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