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Nature Biotechnology 26, 187–188 (1 February 2008) | doi:10.1038/nbt0208-187

Stem cells in a new light

Henry Klassen & Benjamin Reubinoff

Millions of people worldwide suffer visual disability as a result of retinal diseases that involve the loss of photoreceptor cells. Despite considerable recent interest in using embryonic stem (ES) cells to repair the reti-na, mature photoreceptors have proven particularly difficult to generate.