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Stem cell trial aims to cure blindness

Surgeons in London have carried out a pioneering human embryonic stem cell operation in an ongoing trial to find a cure for blindness for many patients.

The procedure was performed on a woman aged 60 at Moorfields Eye Hospital. It involved "seeding" a tiny patch with specialized eye cells and implanting it at the back of the retina.’

Amazing procedure, science at the edge and an overwhelmingly positive BBC website piece. But there was no comment about any ethical issue/concerns regarding the use of Human Embryonic Stem Cells in this advance. Is that concept and process now so normalized that ethical discussion is not  thought necessary? 

http://www.bbc.com/news/health-34384073