The statistical analysis was performed using the Statistical Package for the Social Sciences version 15.0 (SPSS, Inc., Chicago, IL, USA). Data were expressed as the mean ± SD, and the normality of the continuous data was assessed using the Kolmogorov-Smirnov test. The continuous variables, including age, ferritin, hemoglobin, visual acuity, axial length, IOP, and CCT, were assessed through the independent 2-sample Student's t-test. Categorical variables were compared using the chi-square test. The Pearson and point-biserial correlation analysis was used to evaluate the relationship between the variables. A P value of <0.05 was considered statistically significant.