Visual Impairment Associated with Higher Non‑cardiovascular, Non‑cancer Mortality

Cardiovascular mortality showed a modest association with visual impairment but no link to cancer-related deaths. Researchers believe the excess mortality risk observed among patients with VI could be attributed to “impaired mobility, disability and reduced capacity for chronic disease self-management.” Photo: CDC. Click image to enlarge. Several population-based studies have observed an association between visual impairment (VI) and increased all-cause mortality. A recent analysis examined whether this excess risk is concentrated in non‑cardiovascular, non‑cancer deaths rather than heart disease or malignancy, and found that it is—supporting the idea that vision loss can signal broader systemic vulnerability.To conduct the study, researchers analyzed data from four National Health and Nutrition Examination Survey (NHANES) cycles (2001 to 2008). The sample comprised 11,938 adults aged 40 years or older, of which 1,179 participants met the criteria for VI (visual acuity worse than 20/40 in the better‑seeing eye). Then, the researchers linked this data to the National Death Index through December 31, 2019. Fully adjusted hazard models included age, sex, race/ethnicity, education, poverty‑income ratio, hypertension, body mass index, smoking and diabetes.Over a mean follow‑up of 13.2 years, 3,871 participants died (23.6%). Mortality was significantly higher among those with VI (48.2%) vs. those without (21.8%). Survival differences were substantial: five‑year survival was 78.5% with VI vs. 91.6% without, 10‑year survival was 58.6% vs. 81.0% and 15‑year survival was 44.2% vs. 69.5%.In cause‑specific analyses, non‑cardiovascular, non‑cancer deaths numbered 1,776 and retained the strongest association with VI (fully adjusted hazard ratio [HR]: 1.55). VI was modestly associated with cardiovascular mortality (HR: 1.33), but not at all with cancer mortality (HR: 0.98).Diabetes‑related mortality showed a particularly large effect (HR: 2.07); however, sensitivity analyses excluding participants with diabetes produced a similar all‑cause estimate (HR: 1.38), which the researchers noted in their paper “[indicates] that excess risk is not solely attributable to metabolic disease.” Moreover, adjustment for reported functional impairment attenuated but did not fully eliminate the association; functional impairment itself was strongly linked to mortality (HR: 1.54). According to the authors, this suggests “that functional limitations may partially account for the observed excess risk.”The researchers also found that VI was associated with lower education level and socioeconomic status. “Prior work in a large US cohort has similarly shown that key social determinants—particularly transportation barriers, insurance status, income and food insecurity—are closely intertwined with ocular disease burden and access to eye care, and that worsening disease severity is accompanied by greater access barriers,” the researchers explained. They added, “These findings support interpreting VI as a marker of cumulative structural vulnerability that may amplify downstream health risks.”Interestingly, the relative association between visual impairment and all‑cause mortality was greater at younger ages, which may reflect that vision loss in midlife often signals an earlier burden of systemic illness, functional decline or accumulated social disadvantage. Among older adults, by contrast, “higher baseline mortality risk, competing causes of death and survivor bias may attenuate relative associations, even if absolute mortality risk remains elevated,” the authors explained. They conveyed the need for longitudinal studies with repeated vision measures and extended follow‑up to test these hypotheses.“Taken together,” the study authors concluded, “these findings suggest that the mortality burden associated with VI extends beyond cardiovascular pathways and is largely concentrated in noncardiovascular, non-cancer causes of death, emphasizing vision loss as a marker of broader systemic and functional vulnerability rather than a predominantly vascular risk factor.”Click here for the journal source. Kim T, Liu JZ, Zhou J, et al. Visual impairment as a marker of systemic vulnerability and cause-specific mortality in U.S. adults. Am J Ophthalmol. April 22, 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.