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Open Access 01-09-2020 | Refractive Errors | Original Paper

School-based epidemiology study of myopia in Tianjin, China

Authors: Jiaxing Wang, Ying Li, Zhenyang Zhao, Nan Wei, Xiaoli Qi, Gang Ding, Xue Li, Jing Li, Linlin Song, Ying Zhang, Richard Hyun Yi, Yuxian Ning, Xiaoyu Zeng, Ning Hua, Xuehan Qian

Published in: International Ophthalmology | Issue 9/2020

Abstract

Purpose

To study the epidemiology of myopia in school-aged children in Tianjin and the relationship between visual acuity-based screening and refraction-based screening.

Method

This school-based prospective cohort study was performed on children from 42 elementary schools and 17 middle schools in Tianjin, China. Totally 14,551 children, ages ranging from 5 to 16 years, were included in this study. Uncorrected visual acuity (UCVA) was determined by logarithmic tumbling E chart. Non-cycloplegic photorefraction was examined by the Spot (v2.1.4) photoscreener. The relationship between the UCVA and refractive error was investigated for different age groups.

Results

The overall prevalence of myopia at this school based screen is 78.2%, ranged from 10% at age of 5 to 95% at age of 16. The most dramatic increase in prevalence is from age of 6 (14.8%) to age of 7 (38.5%). The overall prevalence of high myopia is 2.5%. UCVA is found corresponding to spherical equivalent refraction (SER) in a manner of normal distribution and is significantly affected by age. When using UCVA to estimate the prevalence of myopia, the overall sensitivity and specificity are 0.824 and 0.820, respectively. Age-dependent optimal cutoff points and 95% confident intervals of such estimation are reported.

Conclusions

Myopia is heavily affecting school-aged children in Tianjin, China. The refraction screening is preferable for myopia screening, whereas the UCVA screening results need to be interpreted in an age-dependent manner for myopia estimation.

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Title: School-based epidemiology study of myopia in Tianjin, China
Authors: Jiaxing Wang
Ying Li
Zhenyang Zhao
Nan Wei
Xiaoli Qi
Gang Ding
Xue Li
Jing Li
Linlin Song
Ying Zhang
Richard Hyun Yi
Yuxian Ning
Xiaoyu Zeng
Ning Hua
Xuehan Qian
Publication date: 01-09-2020
Publisher: Springer Netherlands
Keyword: Refractive Errors
Published in: International Ophthalmology / Issue 9/2020
Print ISSN: 0165-5701
Electronic ISSN: 1573-2630
DOI: https://doi.org/10.1007/s10792-020-01400-w

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School-based epidemiology study of myopia in Tianjin, China

Abstract

Purpose

Method

Results

Conclusions

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Abstract

Purpose

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Results

Conclusions

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