Investigation of Visual Impairment and Socioeconomic Factors

Overview of Vision Loss Prevalence

An international research team conducted a study to explore the connection between visual impairment and socioeconomic factors. Vision loss ranks as the third most prevalent impairment globally, affecting roughly 223.4 million individuals, according to the Global Burden of Diseases, Injuries and Risk Factors Study from 2010. With increasing life expectancy and population growth, the incidence of vision loss is anticipated to rise. The World Health Organization reports that about 90% of those with visual impairments reside in low-income settings, raising concerns regarding social and economic development in these regions.

Research Objectives

The research team aimed to determine the relationship between the prevalence of visual impairment and economic development at the country level. They sought to model a socioeconomic-adjusted disease prevalence using data collected from 190 countries and territories. This data included the age-standardized prevalence of moderate to severe visual impairment and blindness in 2010, gross domestic product (GDP) per capita, total health expenditure, and health expenditure as a percentage of GDP. Countries were categorized into four levels of human development index (HDI): low, medium, high, and very high. The HDI is a composite measure that reflects quality of life factors such as lifespan, education level, and standard of living. The findings were published in the journal JAMA Ophthalmology.

Findings: Correlation Between Socioeconomic Development and Visual Impairment

The collected data revealed a strong association between the prevalence of visual impairment and the level of socioeconomic development. Notably, socioeconomic factors accounted for approximately 69.4% of global variations in the prevalence of visual impairment and 76.3% of variations in blindness prevalence. This close correlation between the burden of visual impairment and socioeconomic indicators may assist in identifying countries that require more focused attention on these issues.

Implications for Public Health

The results of this study may provide valuable insights for establishing appropriate public health targets that align with a country’s socioeconomic development level.

Reference

Wang, Wei, et al. “Association of Socioeconomics With Prevalence of Visual Impairment and Blindness.” JAMA Ophthalmology 135.12 (2017): 1295-1302.