https://scholars.lib.ntu.edu.tw/handle/123456789/199885
標題: | The Prevalence of Astigmatism in Taiwan Schoolchildren | 作者: | SHIH, YUNG-FENG HSIAO, CHUHSING K. TUNG, YI-LIANG LIN, LUKE LONG-KUANG CHEN, CHIEN-JEN HUNG, POR-TYING |
關鍵字: | astigmatism;myopia;hyperopia | 公開日期: | 2004 | 卷: | VISION | 期: | n.2 | 起(迄)頁: | 94-98 | 來源出版物: | OPTOMETRY AND | 摘要: | Purpose. To understand the prevalence and distribution of astigmatism in schoolchildren in Taiwan, we analyzed and compared the nationwide survey data in 1995 and 2000. Methods. A total of 11,175 students were enrolled in 1995, and 10,878 students were enrolled in 2000. The refractive status of each student was measured with an autorefractor during cycloplegia and rechecked with retinoscopy. Results. About half of schoolchildren (57.5% in 1995 and 49.0% in 2000) had no astigmatism (<0.5 D). About one third of schoolchildren’s astigmatism was <1 D (27.9% vs. 32.6%). Eleven percent of schoolchildren in 1995 and 13% in 2000 had astigmatism between 1.0 and 2.0 D. Less than 2% of students had astigmatism >3.0 D (1.3% in 1995 and 1 .8% in 2000). Most astigmatism was with-the-rule: 83.3% in 1995 and 89.9% in 2000. Only 16.6% of children in 1995 and 9.7% in 2000 had against-the- rule astigmatism. Very little astigmatism was oblique (0.1% in 1995 and 0. 4% in 2000). The rate of myopic astigmatism increased with age. In contrast, the rate of hyperopic and mixed astigmatism decreased with age. In addition, the rate of with-the-rule astigmatism increased and the rate of against-the-rule decreased with respect to age, but oblique astigmatism was rather stable with age. Conclusions. Most schoolchildren had little or no astigmatism. In Taiwan, most astigmatism is <1 D and is myopic with- the-rule astigmatism. There was more myopic astigmatism and with-the-rule astigmatism in 2000 than in 1995. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/99533 |
顯示於: | 醫學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。