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Title: Near-work activity, night-lights, and myopia in the Singapore-China study
Authors: Saw, S.-M. 
Zhang, M.-Z.
Hong, R.-Z.
Fu, Z.-.
Pang, M.-H.
Tan, D.T.H.
Issue Date: 2002
Citation: Saw, S.-M.,Zhang, M.-Z.,Hong, R.-Z.,Fu, Z.-.,Pang, M.-H.,Tan, D.T.H. (2002). Near-work activity, night-lights, and myopia in the Singapore-China study. Archives of Ophthalmology 120 (5) : 620-627. ScholarBank@NUS Repository.
Abstract: Objective: To investigate the relationship among nearwork activity, night-lights, and myopia in schoolchildren in Singapore and Xiamen, China. Methods: The refractive error and ocular dimensions of 957 Chinese schoolchildren aged 7 to 9 years in Singapore and Xiamen, China, were determined using cycloplegic autorefraction and A-scan ultrasound biometry. Information on near-work activity (number of books read per week, reading in hours per day) and night-light use before age 2 years was obtained. Results: The prevalence rate of myopia was 36.7% (95% confidence interval [CI], 33.0%-40.3%) in Singapore and 18.5% (95% CI, 14.0%-23.1%) in Xiamen, China. The crude odds ratio (OR) of higher myopia (at least -3.0 diopters) for children who read more than 2 books per week was 3.50 (95% CI, 2.15-5.70). In a multivariate logistic regression model, the OR of higher myopia for children who read more was 2.81 (95% CI, 1.69-4.69), adjusted for age, night-light use, parental myopia, and country, whereas there was no association between night-light use before age 2 years and higher myopia (OR, 1.54; 95% CI, 0.92-2.58), after controlling for age, books read per week, parental myopia, and country. Main Outcome Measures: The ORs of higher myopia for children who read more and children who are exposed to night-lights before age 2 years. Conclusions: Reading (number of books per week) may be associated with higher myopia in Chinese schoolchildren. However, night-light use does not seem to be related to higher myopia.
Source Title: Archives of Ophthalmology
ISSN: 00039950
Appears in Collections:Staff Publications

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