Table 3. Age-standardized prevalence of refractive errors in either eye according to the Korea Centers for Disease Control and Prevention definition (n = 33,922).

Anisometropia was defined as an SE difference ≥2.0 D or a cylindrical difference ≥1.5 D in either eye. Complex sample analysis was performed with reference to weight, stratification variance, and cluster variance, following the statistical guidelines of the Korea Centers for Disease Control and Prevention. Age- and gender-standardized prevalence and age-standardized prevalence was provided based on post-stratified weight.

SE = spherical equivalent; D = diopters; CI = confidence interval; Cyl = cylindrical error.