ArticleOphthalmology and therapy2023
Effect of Myopic Undercorrection on Habitual Reading Distance in Schoolchildren: The Hong Kong Children Eye Study.
Article in Ophthalmology and therapy, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 9 citations in OpenAlex.
- Correlation analysis between visual factors and academic performance in Chinese children.Scientific reports · 2026Article
- Associations of postural asymmetry with refractive error: an objective photogrammetric analysis in students.Frontiers in medicine · 2026Article
- Thicker peripapillary choroid may be associated with behavioral factors in Tokyo's children.Scientific reports · 2025Article
- The association between spinal health and visual function in a pediatric population: insights from large-scale health examinations.Frontiers in public health · 2025Article
- The Parameters Governing the Anti-Myopia Efficacy of Chromatically Simulated Myopic Defocus in Tree Shrews.Translational vision science & technology · 2024Article
- Urban Living Environment and Myopia in Children.JAMA network open · 2023Article
- Prevalence of Myopia in Children Before, During, and After COVID-19 Restrictions in Hong Kong.JAMA network open · 2023Article
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Authors and funding
16 authors at 4 institutions in 4 countries.
Funding
Abstract
introductionThis study aimed to evaluate the habitual reading distance among non-myopic children and also myopic children with undercorrection and with full correction.
methodsThis was a population-based cross-sectional study with a total of 2363 children aged 6-8 years who were recruited from the Hong Kong Children Eye Study. Cycloplegic autorefraction, subjective refraction, habitual visual acuity, and best corrected visual acuity were measured. The entire reading process (9 min) was recorded using a hidden video camera placed 5 m away from the reading desk. Reading distances were taken at 6, 7, 8, and 9 min after the child began reading and were measured using a customized computer program developed in MATLAB. The main outcome was the association of habitual reading distances with refraction status. Habitual reading distances of children were documented via video camera footage.
resultsThe habitual reading distances of undercorrected myopic children (23.37 ± 4.31 cm) were the shortest when compared to non-myopic children (24.20 ± 4.73 cm, P = 0.002) and fully corrected myopic children (24.81 ± 5.21 cm, P < 0.001), while there was no significant difference between the last two children groups (P = 0.17). A shorter reading distance was associated with myopia (OR 1.67; 95% CI 1.11-2.51; P = 0.013) after adjusting for age, sex, height, near work time, outdoor time, and parental myopia. The association of reading distance with myopia did not hold after undercorrected myopic children were excluded (OR 0.97, 95% CI 0.55-1.73; P = 0.92). A shorter reading distance correlated with poorer vision under habitual correction (β = - 0.003, P < 0.001).
conclusionA shorter reading distance was present among undercorrected myopic children. Myopia undercorrection is not recommended as a strategy for slowing myopic progression.
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