Peripheral refraction in 7- and 14-year-old children in central China: The Anyang Childhood Eye Study

Li, Shi-Ming, Li, Si-Yuan, Liu, Luo-Ru, Zhou, Yue-Hua, Yang, Zhou, Kang, Meng-Tian, Li, He, Yang, Xiao-Yuan, Wang, Yi-Peng, Zhan, Si-Yan, Mitchell, Paul, Wang, Ningli, Atchison, David A., & the Anyang Childhood Eye Study Group (2015) Peripheral refraction in 7- and 14-year-old children in central China: The Anyang Childhood Eye Study. British Journal Of Ophthalmology, 99(5), pp. 674-679.

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Purpose: To determine the distribution of peripheral refraction, including astigmatism, in 7- and 14-year-old Chinese children.

Methods: 2134 7-year-old and 1780 14-year-old children were measured with cycloplegic central and horizontal peripheral refraction (15° and 30° at temporal and nasal visual fields).

Results: 7- and 14-year-old children included 9 and 594, respectively, with moderate and high myopia (≤−3.0 D), 259 and 831 with low myopia (−2.99 to −0.5 D), 1207 and 305 with emmetropia (−0.49 to +1.0 D), and 659 and 50 with hyperopia (>1.0 D), respectively. Myopic children had relative peripheral hyperopia while hyperopic and emmetropic children had relative peripheral myopia, with greater changes in relative peripheral refraction occurring in the nasal than the temporal visual field. The older group had the greater relative peripheral hyperopia and higher peripheral J180. Both age groups showed positive slopes of J45 across the visual field, with greater slopes in the older group.

Conclusions: Myopic children in mainland China have relative peripheral hyperopia while hyperopic and emmetropic children have relative peripheral myopia. Significant differences exist between 7- and 14-year-old children, with the latter showing more relative peripheral hyperopia, greater rate of change in J45 across the visual field, and higher peripheral J180.

Impact and interest:

3 citations in Scopus
2 citations in Web of Science®
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ID Code: 92248
Item Type: Journal Article
Refereed: Yes
DOI: 10.1136/bjophthalmol-2014-305322
ISSN: 1468-2079
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Optometry & Vision Science
Deposited On: 22 Jan 2016 02:45
Last Modified: 27 Jan 2016 02:31

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