BBC journalist Ramadan Younes investigates the world of genetic eye disease ‘treatments’, where some practitioners claim to cure the incurable. Living with his own visual impairment, Ramadan sets out to explore how clinics around the world, from Sudan to Gaza and from Russia to the United States, target predominantly Arab patients by advertising, selling and conducting procedures that are at best ineffective and can at worst cause total blindness.Producer: Matt Pintus Editor: Clare Fordham

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