British scientists have developed the world's first stem cell therapy to cure the most common cause of blindness. Surgeons predict it will become a routine, one-hour procedure that will be generally available in six or seven years' time. The treatment involves replacing a layer of degenerated cells with new ones created from embryonic stem cells. This week Pfizer, the world's largest pharmaceutical research company, will announce its financial backing to bring the therapy to patients. The treatment will tackle age-related macular degeneration (AMD), the most common cause of blindness.
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