Prevalence of refractive errors in Iranian university students in Kazerun

Hashemi, H. and Pakzad, R. and Ali, B. and Yekta, A. and Ostadimoghaddam, H. and Heravian, J. and Yekta, R. and Khabazkhoob, M. (2018) Prevalence of refractive errors in Iranian university students in Kazerun. Journal of Current Ophthalmology.

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Purpose: To determine the prevalence of refractive errors and visual impairment and the correlation between personal characteristics, including age, sex, weight, and height, with different types of refractive errors in a population of university students in the south of Iran. Methods: In this cross-sectional study, a number of university majors were selected as clusters using multi-stage sampling in all universities located in Kazerun (27 clusters of 133 clusters). Then, proportional to size, a number of students in each major were randomly selected to participate in the study. Uncorrected and corrected visual acuity, non-cycloplegic objective refraction and subjective refraction were measured in all participants. Results: The prevalence and 95 confidence interval (CI) of presenting visual impairment and blindness was 2.19 (1.48–3.23) and 0.27 (0.12–0.62), respectively. Refractive errors comprised 75 of the causes of visual impairment. The prevalence (95 CI) of myopia spherical equivalent (SE) ≤ −0.5 D, hyperopia (SE ≥ 0.5 D), and astigmatism (cylinder power < −0.5 D) was 42.71% (39.71–45.77), 3.75% (2.85–4.51), and 29.46% (27.50–31.50), respectively. Totally, 49.03% (46.39–51.68) of the participants had at least one type of refractive error. There was a positive association between weight and myopia (1.01; 95% CI: 1.01–1.02), anisometropia (1.03; 95% CI: 1.01–1.06), and refractive errors (1.01; 95% CI: 1.01–1.02). In comparison with the age group 18–19 years, the odds ratio (OR) of astigmatism in the age group 26–27 years was 1.64 (95% CI: 1.03–2.61), and the OR of anisometropia in the age group ≥30 years was 0.21 (95% CI: 0.04–0.98). Conclusions: The prevalence of refractive errors, especially myopia, is higher in university students than the general population. Since refractive errors constitute a major part of visual impairment, university students should receive special services for providing corrective lenses and glasses to reduce the burden of these disorders. © 2018 Iranian Society of Ophthalmology

Item Type: Article
Additional Information: Cited By :1 Export Date: 16 February 2020 Article in Press Correspondence Address: Yekta, A.; Department of Optometry, School of Paramedical Sciences, Mashhad University of Medical SciencesIran; email:
Uncontrolled Keywords: Astigmatism Hyperopia Myopia Student Visual impairment
Subjects: WW Ophthalmology
Divisions: Mashhad University of Medical Sciences
Depositing User: lib2 lib2 lib2
Date Deposited: 20 May 2020 03:53
Last Modified: 20 May 2020 03:53

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