Prevalence of refractive errors among primary school children in a tropical area, Southeastern Iran

Mahjoob, M. and Heydarian, S. and Nejati, J. and Ansari-Moghaddam, A. and Ravandeh, N. (2016) Prevalence of refractive errors among primary school children in a tropical area, Southeastern Iran. Asian Pacific Journal of Tropical Biomedicine, 6 (2). pp. 181-184.

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Objective: To determine the prevalence of refractive errors among primary school children in Zahedan District, Southeastern Iran, as a tropical area. Methods: In this cross sectional study, a total of 400 students were selected randomly using multi-stage sampling technique. Myopia was defined as spherical equivalent (SE) of -0.5 diopter (D) or more, hyperopia was defined as SE of +2.00 D or more and a cylinder refraction greater than 0.75 D was considered astigmatism. Anisometropia was defined as a difference of 1 D or more between two eyes. Cycloplegic refractive status was measured using auto-refractometer (Topcon 8800). Data were analyzed using SPSS, version 22 software program. Results: Mean ± SD of SE was (1.71 ± 1.16) D. A total of 20 students 6.3%, 95% confidence interval (CI): 3.96%-9.64% were myopic (≤ -0.5 D), 186 students (58.1%, 95% CI: 52.50%-63.56%) were hyperopic (≥ +2.00 D) and 114 students (35.6%, 95% CI: 30.43%-41.18%) were emmetropic. The prevalence of astigmatism (≥ 0.75 D) among students was 3.4% (95% CI: 1.82%-6.25%). Anisometropia of 1 D or more was found in 21.3% (95% CI: 16.98%-26.23%) of the studied population. The prevalence of refractive errors was higher among girls than boys (73.1% vs. 55.6%, P = 0.001), but it was not significantly different among different age groups (P = 0.790). Conclusions: Refractive errors affect a sizable portion of students in Zahedan. Although myopia is not very prevalent, the high rate of hyperopia in the studied population emphasizes its need for attention. © 2016 Hainan Medical University.

Item Type: Article
Additional Information: Cited By :4 Export Date: 16 February 2020 Correspondence Address: Heydarian, S.; Department of Optometry, School of Paramedical Science, Mashhad University of Medical SciencesIran; email:
Uncontrolled Keywords: Anisometropia Astigmatism Hyperopia Myopia Refractive error Article child controlled study cross-sectional study female groups by age human hypermetropia Iran major clinical study male ophthalmic refractometer prevalence primary school priority journal refraction error school child tropics
Subjects: WW Ophthalmology
Divisions: Mashhad University of Medical Sciences
Depositing User: mr lib4 lib4
Date Deposited: 01 Mar 2020 10:11
Last Modified: 01 Mar 2020 10:11

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