Association between amblyopia category (all, resolved and persisting) and burden of metabolic syndrome (number of components). Legend: Medically diagnosed diabetes mellitus (UK Biobank field “2443”) and high blood pressure (derived from field “6150”), and obesity (classified as BMI>30 kg/m2, derived from fields “21,002” for weight and “12,144” for height) were the three components relevant to the presence of metabolic syndrome. CI: Confidence interval; RRR: Relative risk ratio.