​​Youth Vision Loss Varies Worldwide by Sociodemographic Status

The World Health Organization estimates that about half of the 2.2 billion cases of vision impairment worldwide could have been prevented or remain unaddressed. Photo: Int'l Agency for the Prevention of Blindness. Click image to enlarge. Though the rates of vision impairment in children and adolescents account for a relatively small percentage of total blindness worldwide, the impact is quite pronounced in young people given their greater life expectancy. To quantify the true burden of vision loss and blindness in this population (aged 0-24), researchers in Beijing performed an analysis of the Global Burden of Disease 2021 database. Their study revealed less health loss as a result of vision impairment but rising global disparities and an increase in absolute cases.In the epidemiological study, the researchers obtained prevalence rates adjusted for age as well as disease burden metrics in disability-adjusted life years, which represent the years lost to premature death or years lived with disability.They reported that disability-adjusted life years decreased while prevalence rates increased slightly over the study period. Population growth accounted for the increases in absolute case numbers. Further analysis showed that female individuals and older adolescents (aged 15 to 24) had a disproportionately higher burden of blindness and vision loss.Increasing prevalence was identified in low and middle sociodemographic index (SDI) regions while high SDI regions exhibited decline. With rising SDI, risk factors shift from environmental to metabolic. The researchers anticipate an increase in total cases and modest decreases in prevalence rates and life years by 2030. Their analysis suggested improvement potential in several countries.Ultimately, the study findings revealed that though the burden of disease has decreased, the absolute number of cases is still rising—and rising in an unequal fashion, with relative inequalities increasing over time. The authors recommended adopting strategies such as “strengthening primary eyecare systems and expanding service access in low-SDI regions, while prioritizing myopia and metabolic-related eye disease prevention in high-SDI regions.” Importantly, they wrote that any actions “must embed health-equity principles within global cooperation.”Click here for the journal source. Yang L, Zhou S, Sun J, Yang X. Global, regional, and national burden of blindness and vision loss in individuals aged 0-24 years, 1990-2021: divergent trends, inequalities and projections based on GBD 2021. Am J Ophthalmol 2026. [Epub ahead of print]. This article was developed by the editorial staff in conjunction with experts in the field. In the process, AI may have been among the editorial tools used to meet the goals of human editors, who approved all content.