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Archives of Ophthalmology
Year: 2009  |  Volume: 127  |  Issue: 6  |  Page No.: 776 - 783

EPIDEMIOLOGY: Myopia, Spectacle Wear, and Risk of Bicycle Accidents Among Rural Chinese Secondary School Students: The Xichang Pediatric Refractive Error Study Report No. 7

M Zhang, N Congdon, L Li, Y Song, K Choi, Y Wang, Z Zhou, X Liu, A Sharma, W Chen and D. S. C. Lam    

Abstract:

Objective  To study the effect of myopia and spectacle wear on bicycle-related injuries in rural Chinese students. Myopia is common among Chinese students but few studies have examined its effect on daily activities.

Methods  Data on visual acuity, refractive error, current spectacle wear, and history of bicycle use and accidents during the past 3 years were sought from 1891 students undergoing eye examinations in rural Guangdong province.

Results  Refractive and accident data were available for 1539 participants (81.3%), among whom the mean age was 14.6 years, 52.5% were girls, 26.8% wore glasses, and 12.9% had myopia of less than –4 diopters in both eyes. More than 90% relied on bicycles to get to school daily. A total of 2931 accidents were reported by 423 participants, with 68 requiring medical attention. Male sex (odds ratio, 1.55; P < .001) and spectacle wear (odds ratio, 1.38; P = .04) were associated with a higher risk of accident, but habitual visual acuity and myopia were unassociated with the crash risk, after adjusting for age, sex, time spent riding, and risky riding behaviors.

Conclusion  These results may be consistent with data on motor vehicle accidents implicating peripheral vision (potentially compromised by spectacle wear) more strongly than central visual acuity in mediating crash risk.

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