Age-adjusted prevalence of any visual difficulty and severe or extreme visual difficulty by region and country*.

*Prevalence estimates and standard errors are adjusted for the complex survey design except for 11 countries (Austria, Belgium, Germany, Denmark, United Kingdom, Greece, Italy, Netherlands, Slovenia, Guatamala, Zambia) that did not provide information on sampling weights. Unweighted estimates are used for those 11 countries marked with †.LIC = low income status, MIC = middle income status, HIC = high income status.