Jenny M Ip

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PURPOSE To examine the association of time spent in near work and reading with spherical equivalent refraction (SER) in a population-based sample of 12-year-old Australian schoolchildren. METHODS Data on the time spent in near-work or outdoor activities per week and estimates for the duration of continuous reading and reading distances, were collected in(More)
PURPOSE To examine associations between myopia and measures of urbanization in a population-based sample of 12-year-old Australian children. METHODS Questionnaire data on sociodemographic and environmental factors including ethnicity, parental education, and time spent in near work and outdoor activities were collected from 2367 children (75.0% response)(More)
PURPOSE To examine the influences of ethnicity, parental myopia, and near work on spherical equivalent refraction (SER) and axial length (AL) in a population-based sample of 12-year-old Australian children. METHODS Year-7 children in the Sydney Myopia Study (n = 2353, 75.3% response) underwent an ophthalmic examination including cycloplegic autorefraction(More)
PURPOSE To describe the prevalence of hyperopia and associated factors in a representative sample of Australian schoolchildren 6 and 12 years old. DESIGN Population-based cross-sectional study. PARTICIPANTS Schoolchildren ages 6 (n = 1765) and 12 (n = 2353) from 55 randomly selected schools across Sydney. METHODS Detailed eye examinations included(More)
PURPOSE To compare the distribution of spherical equivalent refraction (SER) and other ocular parameters and to assess the contribution from oculometric parameters to SER in two age-specific, cross-sectional samples of children, and in two ethnic groups (European Caucasian and East Asian). METHODS A random-cluster design was used to recruit predominantly(More)
PURPOSE To examine the impact of parental astigmatism on astigmatic error and ocular biometric parameters in children. DESIGN Population-based cross-sectional study. METHODS Six-year-old children (n = 1,741; 78.9% response) and 12-year-old children (n = 2,367; 75.3% response) underwent a comprehensive eye examination, including cycloplegic(More)
PURPOSE To assess the sensitivity and specificity of predicting refractive error type using information from a four-item questionnaire on the purpose of spectacle use and age at first use. METHODS The Sydney Myopia Study examined 1,740 year 1 (78.9% response) and 2,353 year 7 students (75.3% response) from a random cluster sample of 34 primary and 21(More)
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