Prevalence of blindness decreasing but case numbers rising, study shows
According to new researched published by The Lancet Global Health Journal, there has been a 15.4% decrease in avoidable blindness globally in the past decade.
However, the raw number of people with blindness and vision impairment has increased everywhere as the world’s population continues to grow and age.
The study, which gained support from The Fred Hollows Foundation reports 1.1 billion people living with some form of vision impairment around the world. This is expected to increase to 1.7 billion by 2050.
Meanwhile, around 43.3 million people living with blindness today. Experts project this number to grow to 61 million by 2050.
Gender disparities continue to hamper efforts, with women and girls making up 55 per cent of people who are blind or vision impaired, and they remain overrepresented across all severity categories and age groups.
Asia has seen the greatest increase in blindness and vision impairment across all regions since 1990, with an increase of 10.7 per cent in moderate and severe vision impairment in East Asia, due to the myopia epidemic.
The Fred Hollows Foundation CEO Ian Wishart said the findings come after decades of concerted effort by the global eye health sector to support governments and communities around the world.
“Eye health services have been doggedly working to restore sight and prevent blindness, and this study shows they’ve successfully reduced the prevalence of avoidable blindness since 2010. It’s good improvement,” Wishart said.
“The Foundation has known for years that despite progress which has addressed the most severe cases of blindness and vision impairment, we are not keeping pace with the overall growth in cases as the global population grows,” he said.
Wishart also highlighted the importance of eye health to a person’s quality of life. He noted that eye health and related services was also impacted heavily by the ongoing COVID-19 pandemic.
“Eye health is fundamental to a person’s overall wellbeing and independence. We are continuing our work to treat as many people as possible, but health systems around the world have been severely impacted by COVID-19,” Wishart said.
“In order to treat the growing number of people who are becoming blind and vision impaired, we need more eye health services and more specialists. Eye health needs to be taken seriously,” he said.
The study is based on an analysis of global data over a 30-year period, from 1990 to 2020. It shows the three leading causes of blindness are cataract, glaucoma and uncorrected refractive error.
The study was conducted by the Vision Loss Expert Group comprised of international ophthalmologists and optometrists, with funding provided by The Fred Hollows Foundation, Brien Holden Vision Institute, Fondation Théa, Bill & Melinda Gates Foundation, Sightsavers International, and the University of Heidelberg.