Eating fish can help prevent blindness, researchers have found.

The recent study carried out by Harvard Medical School showed that consumption of fish can cut the most common cause of age-related blindness by 42 per cent in women.

Dr William Christen, of Harvard Medical School who led the project, said that dark fish meat seemed to be the most effective.

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He said: “This lower risk appeared to be due primarily to consumption of canned tuna fish and dark-meat fish.”

The research revealed that women who consumed one or more servings of fish a week was linked to a 42 per cent lower risk of sight loss compared to those only eating one serving a month.

It also showed that women who consumed the most fish oils had a 38 per cent lower risk of developing AMD compared with those who didn’t eat the omega-3 fatty acids as often.

The study, which was published in the journal Archives of Ophthalmology said: “In summary, these prospective data from a large population of women with no prior diagnosis of AMD indicate that regular consumption of DHA and EPA and fish significantly reduced the risk of incident AMD”.

More than 500,000 people in the UK  suffer from age-related macular degeneration (AMD).