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Retinal ganglion cells are neurons that send 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), were created in a petri dish from stem cells. Making retinal ganglion cells and astrocytes from stem cells may one day help doctors rewire optic nerves damaged by glaucoma.

Credit: National Eye Institute, National Institutes of Health (NEI/NIH)

 

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