The prevalence of refractive errors in 6- to 15-year-old schoolchildren in Dezful, Iran

Norouzirad, R. and Hashemi, H. and Yekta, A. and Nirouzad, F. and Ostadimoghaddam, H. and Yazdani, N. and Dadbin, N. and Javaherforoushzadeh, A. and Khabazkhoob, M. (2015) The prevalence of refractive errors in 6- to 15-year-old schoolchildren in Dezful, Iran. Journal of Current Ophthalmology, 27 (1-2). pp. 51-55.

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Purpose: To determine the prevalence of refractive errors, among 6- to 15-year-old schoolchildren in the city of Dezful in western Iran. Methods: In this cross-sectional study, 1375 Dezful schoolchildren were selected through multistage cluster sampling. After obtaining written consent, participants had uncorrected and corrected visual acuity tests and cycloplegic refraction at the school site. Refractive errors were defined as myopia spherical equivalent (SE) -0.5 diopter (D), hyperopia (SE ≥ 2.0D), and astigmatism (cylinder error > 0.5D). Results: 1151 (83.7%) schoolchildren participated in the study. Of these, 1130 completed their examinations. 21 individuals were excluded because of poor cooperation and contraindication for cycloplegic refraction. Prevalence of myopia, hyperopia, and astigmatism were 14.9% (95% confidence interval (CI): 10.1-19.6), 12.9% (95% CI: 7.2-18.6), and 45.3% (95% CI: 40.3-50.3), respectively. Multiple logistic regression analysis showed an age-related increase in myopia prevalence (p << 0.001) and a decrease in hyperopia prevalence (p << 0.001). There was a higher prevalence of myopia in boys (p<<0.001) and hyperopia in girls (p = 0.007). Conclusion: This study showed a considerably high prevalence of refractive errors among the Iranian population of schoolchildren in Dezful in the west of Iran. The prevalence of myopia is considerably high compared to previous studies in Iran and increases with age. © 2015 Iranian Society of Ophthalmology.

Item Type: Article
Additional Information: Cited By :5 Export Date: 16 February 2020 Correspondence Address: Nirouzad, F.; Dezful University of Medical SciencesIran; email:
Uncontrolled Keywords: Children Epidemiology Middle-east Refractive errors adolescent Article astigmatism child child health controlled study cross-sectional study female human hypermetropia Iran male myopia prevalence sex difference uncorrected visual acuity visual acuity visual system examination
Subjects: WW Ophthalmology
Divisions: Mashhad University of Medical Sciences
Depositing User: mr lib5 lib5
Date Deposited: 15 May 2020 20:39
Last Modified: 15 May 2020 20:39

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