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KMID : 1011420190240030189
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Journal of Korean Ophthalmic Optics Society
2019 Volume.24 No. 3 p.189 ~ p.196
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Anisometropia and Visual Impairment in Korean Adults:The Korea National Health and Nutrition Examination Survey 2010
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Kim Hyo-Jin
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Abstract
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Purpose: The aim of this study was to describe the prevalence of anisometropia and its association with visual impairment (VI) among Korean adults.
Methods: This is a population-based cross-sectional study involving 3,632 adults (aged 20- 69 years) who participated in the 2010 Korea National Health and Nutrition Examination Survey. Participants with a history of eye surgery, lens opacification, pseudophakia and aphakia, pterygium, or any ocular disease were excluded. Anisometropia was defined as the spherical equivalent (SE) difference of ≥1.0 or ≥2.0 diopter (D) between the eyes. Age, sex, and refractive errors (myopia, hyperopia, astigmatism, and strabismus) were adjusted using multivariate analysis to evaluate the association between anisometropia and VI. VI was defined as best-corrected visual acuity worse than 20/40 in the eye with compromised vision.
Results: In groups with SE difference of ≥1.0 D and ≥2.0 D between the eyes, the prevalence of anisometropia was 8.43% (95% confidence interval [CI]: 7.35-9.66%) and 2.22% (95% CI: 1.64-3.02%), respectively. Anisometropia was more pronounced in the 20-29 years age group (≥1.0 D: 13.06%, ≥2.0 D: 3.17%). Anisometropia was commonly observed in patients with high myopia, hyperopia, and astigmatism. Anisometropia with SE ≥2.0 D was associated with VI (odds ratio=3.71; 95% CI: 2.29-6.01; p < 0.001) after adjusting for age, sex, myopia, astigmatism, and strabismus.
Conclusions: We determined the prevalence of anisometropia using representative Korean data, and established an association between anisometropia and VI.
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KEYWORD
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Anisometropia, Astigmatism, Myopia, Visual impairment, Strabismus
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