Retinal ganglion cells are neurons that transmit information about light from the eye to the brain via a structure called the optic nerve. Here, new neurons (green) and their supporting cells, called astrocytes (red), have been created in a Petri dish from stem cells. Making retinal ganglion cells and astrocytes from stem cells could one day help doctors rewire optic nerves damaged by glaucoma.

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Photo credit: © NIH / IMAGE POINT FR / BSIP / Alamy / Afripics
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