ArticleInternational journal of ophthalmology2020
Proportion and characteristic of emmetropia in schoolchildren aged 6-11y: the Shenzhen elementary school eye study.
Article in International journal of ophthalmology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed, 19 citations in OpenAlex.
- Identifying and Managing Pre-Myopia: A Narrative Review.Clinical ophthalmology (Auckland, N.Z.) · 2026Review
- Axial elongation as a marker to identify obvious myopic shift in non-myopic eyes of Chinese children.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2025Article
- The Distribution of Ocular Normative Parameters in a Spanish School Population.Journal of clinical medicine · 2025Article
- Refraction and ocular biometric parameters in 3-to 6-year-old preschool children : a large-scale population-based study in Chengdu, China.BMC ophthalmology · 2024Article
- Refractive and corneal astigmatism in Chinese 4-15 years old children: prevalence and risk factors.BMC ophthalmology · 2023Article
- Baseline metrics that may predict future myopia in young children.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2023Article
- Effect of eye rubbing on corneal biomechanical properties in myopia and emmetropia.Frontiers in bioengineering and biotechnology · 2023Article
- Development pattern of ocular biometric parameters and refractive error in young Chinese adults: a longitudinal study of first-year university students.BMC ophthalmology · 2022Article
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Authors and funding
5 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
aimTo investigate the proportion and characteristic of emmetropia in schoolchildren aged 6-11, especially estimate the normal value of ocular biometric parameters of emmetropia.
methodsA population-based cross-sectional study was conducted on children aged 6-11y in Shenzhen. Totally, 2386 schoolchildren from two primary schools were involved. The axial length (AL) and the corneal radius of curvature (CRC) were measured by partial coherence laser interferometry. Noncycloplegic refraction and refractive astigmatism (RA) was measured using autorefraction. The axial length-to-corneal radius of curvature ratio (AL/CRC), corneal astigmatism (CA) and spherical equivalent refraction (SER) were calculated.
resultsThe proportion of emmetropia in elementary school students was 41.30%. This percentage decreased gradually from 6 to 11 years of age and decreased rapidly after 9 years of age. The mean and 95%CI of each parameter were provided for boys and girls aged 6 to 11 years of age with emmetropia according to each age group. The change trend of parameters of boys and girls are similar. After 7 years of age, the AL of non-emmetropia started to increase faster than that of emmetropia. The change trend of AL/CRC was the same as that of AL. The other parameters tend to be stable after 7 years of age.
conclusionThe age of 7-9 is an important period for the changes of refractive state and ocular biometric parameters of primary school students, and it is a special focus period for children myopia prevention. The normal value and variation of ocular biometric parameters of emmetropia can provide the basis for the clinical judgment of whether or not children's ocular biometric parameters obtained by single measurement and changes obtained by multiple measurements are abnormal.
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