Advanced Cell Technology, a U.S. bio-tech company, announced on Monday that the Obama administration has given its approval for the company to begin its second round of trials using human embryonic stem cells to treat blindness in older patients.
The study will follow the progress of patients who are treated with this therapy for a condition called dry age-related macular degeneration. This disease is the most common cause of blindness in those over the age of 60.
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At the moment there is no cure for this condition, which effects between 10 and 15 million people in the United States and an additional 10 million in Europe.