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| Distribution Characteristics and Correction of Astigmatismin Children and AdolescentsAged 6-18Years in Jinan |
| Xiaolin Yin1, Lei Jin2, Qian Li1, Lei Gao1, Shujing Zhao1, Chaofan Liu1, Te Fu1 |
| 1Department of Ophthalmology, Jinan Second People's Hospital, Jinan 250000, China
2Department of Ophthalmology, Shandong Police General Hospital, Jinan 250000, China |
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Abstract Objective: To investigate the epidemiological characteristics of astigmatism in children and adolescents aged 6-18 years in Jinan city, and to explore the distribution of the types and degrees of astigmatism in this population. Methods: In this cross-sectional study,a total of 1 034 863 primary and secondary school students from 1 056 schools in 12 districts and counties of Jinan City were screened for visualacuity and refraction screening,from October to December 2021. Avisualacuity chart meeting therequirements of GB/T1533 was used to evaluate visualacuity, and an optometer meeting therequirementsof ISO0342. was used to assessthe refraction under non-ciliary paralysis. The average value was calculated. Cochran-Armitage trend test was used for age variation. Chi-square test wasused for classified data. Results: The prevalence of astigmatism among students aged 6-18 years in Jinan was 48.8%, of which 25.9% is mild astigmatism, 16.6% was moderate astigmatism, and 6.3% was severeastigmatism. Theprevalenceof astigmatismwas 50.0% in males and 47.4% in females, showing no significant difference. The prevalence of astigmatism in left eye only (15.8%) was significantly higher than in right eye only (7.3%)(χ2=15 900, P<0.001). The prevalence of astigmatism in both eyes (25.7%) was higher than in single eye only (χ2=15 940, P<0.001). The prevalence of mild, moderate and severeastigmatismincreased with age(Z=-82.8, -181.0, -91.3, allP<0.001). With the rule (WTR)astigmatism accounted for the largest proportion in different genders and eyes. The proportion of WTR astigmatism in the left eye was the largest (93.1%). The proportion of WTR astigmatism was higher in boys than in girls, and higher in the left eye than in the right eye, but the difference was not statistically significant (P>0.05).After 7 years old, the proportion of compound hyperopic astigmatism gradually decreased with age, the difference was statistically signifcant (Z=-123.3, all P<0.001). The proportion of combined myopic astigmatism increased with age (Z=-82.9, all P<0.001). The total rate of astigmatism correction was 46.1%. Conclusions:The incidence of astigmatism is high in people aged 6-18 years.In terms of distribution, the main astigmatisms were mild and moderate astigmatism. In the terms of classifcation, the main astigmatisms were astigmatism with the rule and compound myopic astigmatism.
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Received: 28 July 2022
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| Fund:Jinan Clinical Medicine Science and Technology Innovation Plan Project (202019065) |
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Corresponding Authors:
Te Fu, Department of Ophthalmology, Jinan Second People's Hospital, Jinan 250000, China (Email: lucykerin@163.com)
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