Premium
High prevalence of refractive errors in a rural population: ‘ N ooravaran S alamat’ M obile E ye C linic experience
Author(s) -
Hashemi Hassan,
Rezvan Farhad,
Ostadimoghaddam Hadi,
Abdollahi Majid,
Hashemi Maryam,
Khabazkhoob Mehdi
Publication year - 2013
Publication title -
clinical and experimental ophthalmology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.3
H-Index - 74
eISSN - 1442-9071
pISSN - 1442-6404
DOI - 10.1111/ceo.12071
Subject(s) - confidence interval , medicine , odds ratio , anisometropia , population , dioptre , refractive error , visual acuity , ophthalmology , demography , environmental health , sociology
Background The prevalence of myopia and hyperopia and determinants were determined in a rural population of I ran. Design Population‐based cross‐sectional study. Participants Using random cluster sampling, 13 of the 83 villages of K haf C ounty in the north east of I ran were selected. Data from 2001 people over the age of 15 years were analysed. Methods Visual acuity measurement, non‐cycloplegic refraction and eye examinations were done at the M obile E ye C linic. Main Outcome Measures The prevalence of myopia and hyperopia based on spherical equivalent worse than −0.5 dioptre and +0.5 dioptre, respectively. Results The prevalence of myopia, hyperopia and anisometropia in the total study sample was 28% (95% confidence interval: 25.9–30.2), 19.2% (95% confidence interval: 17.3–21.1), and 11.5% (95% confidence interval: 10.0–13.1), respectively. In the over 40 population, the prevalence of myopia and hyperopia was 32.5% (95% confidence interval: 28.9–36.1) and 27.9% (95% confidence interval: 24.5–31.3), respectively. In the multiple regression model for this group, myopia strongly correlated with cataract (odds ratio = 1.98 and 95% confidence interval: 1.33–2.93), and hyperopia only correlated with age ( P < 0.001). The prevalence of high myopia and high hyperopia was 1.5% and 4.6%. In the multiple regression model, anisometropia significantly correlated with age (odds ratio = 1.04) and cataract (odds ratio = 5.2) ( P < 0.001). Conclusion The prevalence of myopia and anisometropia was higher than that in previous studies in urban population of I ran, especially in the elderly. Cataract was the only variable that correlated with myopia and anisometropia.