Patterns and correlates of visual impairment and ocular hypertension among older adults in the general Chinese population: results from the CKB Biobank.

Highest (sex-specific) quartile of physical activity was associated with 14% lower risk (OR=0.86, 95% CI 0.77 to 0.95) of visual impairment than those in the bottom quartile group, although the linear relationship between the two was only borderline significant.

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In addition, although education level was not in a clear linear relationship with vision, it was in a highly significant positive association with OHT, with those having a college or higher degree had more than 50% higher risk than those without formal education.

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