Regular orange eaters are 60 per cent less likely to have developed the disease 15 years later, a new research study has discovered.

People who eat an orange a day are the least likely to suffer from macular degeneration when they're elderly, but even eating an orange once in a while also has some protective effect.

Although vitamins C, E and A are supposed to be keep our eyes healthy, it was the flavonoids specifically found in oranges that seemed to have the greatest benefit, say researchers from the University of Sydney.