Last updated May 20, 2019 at 11:21 am
Vitamins commonly found in colourful fruits and veggies could help delay the onset of cataracts, and that could save society billions of dollars.
A $5.7 billion global medical bill to restore sight for the estimated 45 million people with cataracts could be slashed in half by a diet rich in colourful fruits and vegetables, according to an international study.
Researchers from China and the University of South Australia have published the first study of its kind to verify the link between foods high in antioxidants and a lower risk of age-related cataracts (ARC).
Despite some inconsistencies, the findings overwhelmingly support the benefits of eating citrus fruits, capsicum, carrots, tomatoes and dark green vegetables such as spinach, broccoli and kale to delay the onset of ARC.
Cataracts cause of 35% of all blindness
More than 700,000 Australians are affected by cataracts and that number is expected to rise substantially with an ageing population, according to the Medibank Better Health Index. Government data shows that cataract removal is one of the most common elective surgeries in Australia, accounting for 240,000 hospitalisations in 2015-16.
“Age-related cataracts are the leading cause of visual impairment among the elderly throughout the world, with unoperated cataracts contributing to 35 per cent of all blindness,” Dr Li says. “Although cataract extraction surgery is an effective method to restore vision, it will have cost society more than $5.7 billion by 2020.”
With the population ageing dramatically and an increasing number of people needing surgery, urgent action is needed, the researchers say.
“If we could delay the onset of ARC by 10 years it could halve the number of people requiring surgery.”
Improvements would rely on global changes to most of the world’s diet, however, with current consumption of antioxidants well below the recommended level to prevent age-related cataracts.