The profile of astigmatism in 6-12-year-old children in Iran
J. optom. (Internet)
; 14(1): 58-68, ene.-mar. 2021. tab, graf
Artigo
em Inglês
| IBECS
| ID: ibc-200293
Biblioteca responsável:
ES1.1
Localização: BNCS
ABSTRACT
PURPOSE:
To determine the prevalence of astigmatism and its determinants in schoolchildren aged 6-12 years.METHODS:
The students selected by stratified cluster random sampling in Shahroud, north of Iran. Optometric examination included uncorrected visual acuity, refraction with autorefractometer, manifest refraction with retinoscopy followed by subjective and cycloplegic refraction (after two drops of cyclopentolate 1% with 5min interval were instilled in each eye). A cylinder power ≥ 0.75 diopter (D) in at least one eye was considered as astigmatism. The prevalence of astigmatism was reported based on a cylinder power higher than 0.50, 1.00, and 2.00 D in cycloplegic refraction, followed by power vector analysis.RESULTS:
After applying the inclusion criteria, the data of 5528 children were analyzed. The prevalence of astigmatism was 16.7% (95% CI 15.6-17.7) in total, 16.6% (95% CI 15.2-18.0) in boys and 16.8% (95% CI 15.2-18.3) in girls (p = 0.920) and decreased from 21.5% in 6-year-old children to 13.7% in 10-year-olds, and then again increased to 18.3% in children aged 12 years. Moreover, 17.2% (95% CI 16.0-18.3) of urban and 12.1% (95% CI 10.0-14.1) of rural children had astigmatism (p < 0.001). The prevalence of with-the-rule, against-the-rule, and oblique astigmatism was 14.2%, 2.1%, and 0.33%, respectively. The mean cylinder power was -1.31, -0.46, and -0.44D in children with spherical myopia, emmetropia, and hyperopia, respectively (p < 0.001). Urban students had a higher J0 and boys had a higher J45.CONCLUSION:
The prevalence of astigmatism in this study was lower than previous studies. Astigmatism prevalence was markedly higher in urban childrenRESUMEN
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Texto completo:
Disponível
Coleções:
Bases de dados nacionais
/
Espanha
Base de dados:
IBECS
Assunto principal:
Astigmatismo
Limite:
Criança
/
Feminino
/
Humanos
/
Masculino
País/Região como assunto:
Ásia
Idioma:
Inglês
Revista:
J. optom. (Internet)
Ano de publicação:
2021
Tipo de documento:
Artigo
Instituição/País de afiliação:
Iran University of Medical Sciences/Iran
/
Mashhad University of Medical Sciences/Iran
/
Noor Eye Hospital/Iran
/
Shahid Beheshti University of Medical Sciences/Iran
/
Shahroud University of Medical Sciences/Iran
/
Tehran University of Medical Sciences/Iran