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Scientists have discovered a gene mutation linked to the most common cause of blindness in the developed world, holding out the prospect of better treatments and perhaps eventually a cure.

British scientists said yesterday they had found six variants within the gene called Serping1 that were associated with age-related macular degeneration (AMD).

"Our findings add to the growing understanding of the genetics of age-related macular degeneration, which should ultimately lead to novel treatments for this common and devastating disease," Sarah Ennis and Andrew Lotery of the University of Southampton reported in the Lancet journal.