| Distribution of the Axis of Astigmatism According to Age in Children . |
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Hyo Churl Song, Jung Yoon Kwon |
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Department of Ophthalmology, Kyungpook National University School of Medicine, Taegu, Korea. |
| 소아난시안에서 연령에 따른 난시축의 분포 |
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송효철(Hyo Churl Song),권정윤(Jung Yoon Kwon) |
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| Abstract |
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We performed this study to investigate the distribution of axes of astigmatism, the occurrence and amount of astigma- tism among pediatric population aged from 1 to 15 years who have visited our clinic from January to December 1997. After routine ophthalmologic examination to rule out any organic abnormality, the cycloplegic refraction was performed with 0.5-1.0% atropine on 529 eyes. Out of 529 eyes, astigmatism was found in 356 eyes (67.3%) with the highest incidence in 15-year-old group being 87.0%. Among 356 eyes with astigma- tism, with-the-rule astigmatism was found in 322 eyes (90.4%); against-the-rule, 30 eyes (8.5%); oblique, 4 eyes (1.1%). With-the-rule astigmatism occurred far more frequently found than against-the-rule in all age groups. As to the type of astigmatism classified by the state of refractive errors,hyperopic astigmatism was found in 144 eyes (40.4%); myopic,136 eyes (38.3%); mixed, 76 eyes (21.3%). Of the total of 356 eyes with astigmatism, astigmatism of 1.0 diopter or less was found in 181 eyes (50.8%). |
| Key Words:
Astigmatism;Children;Distribution |
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