Prevalence and risk factors of refractive errors among schoolchildren in Shiraz, Iran

Yekta, Sr., A., Fotouhi, A., Hashemi, H., Dehghani, C., Ostadimoghaddam, H., Heravian, J., Derakhshan, A., Mehravaran, S., Yekta, R., & Khabazkhoob, M. (2009) Prevalence and risk factors of refractive errors among schoolchildren in Shiraz, Iran. In ARVO 2009, 9-12 September 2009, Ericeira, Portugal.

Abstract

Purpose: To determine the prevalence and risk factors of refractive errors among schoolchildren in Shiraz, Iran.

Methods: In a cross-sectional study, using random cluster sampling, 3065 Shiraz schoolchildren were selected in this study. The participants totaled 2683; 1872 elementary and middle school and 811 high school students. For the primary and middle schoolchildren, cycloplegic refraction and for the high school students, non-cycloplegic autorefraction was measured. Myopia, defined as spherical equivalent (SE) refraction -0.50 diopter (D) or worse, hyperopia as SE +2.00D and +0.50D or more for cycloplegic and noncycloplegic refractions respectively, and astigmatism as cylinder -0.75D or worse.

Results: The prevalence of refractive errors in elementary and middle school students was: myopia 4.35 % (95% confidence interval (CI), 2.89 -5.81), hyperopia 5.04 % (95%CI, 3.49 -6.58) and astigmatism 11.79 % (95%CI, 10.21 -13.38). For high school students, these rates were 22.4 % (95%CI, 18.44 -26.36), 10.52 % (95%CI, 6.75 -14.29) and 20.99% (95%CI, 16.55 -25.44), respectively.The prevalence of myopia increased with age in primary and middle school students (OR=1.15, 95% CI, 0.98 to1.33, p=0.073).

Conclusions: The result of this study indicated a relatively low prevalence of refractive errors among schoolchildren in Shiraz according to the protocol by "Refractive Error Study in Children" (RESC) in other investigations.

Impact and interest:

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ID Code: 84780
Item Type: Conference Item (Poster)
Refereed: Yes
Additional Information: Abstract published in Invest Ophthalmol Vis Sci 2009; 50: E-Abstract 2436
Additional URLs:
Keywords: Prevalence, Refractive error, myopia, hyperopia, astigmatism
ISSN: 1552-5783
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Optometry & Vision Science
Copyright Owner: Copyright 2009 ARVO
Deposited On: 16 Jun 2015 05:42
Last Modified: 24 Jan 2017 22:17

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