A microscopy image of a retinal organoid graft months after transplantation into the eye of a rat with retinal degeneration. This microscopy image, taken with a Zeiss LSM900 confocal microscope, shows the photoreceptors of the graft organized in rosettes, with their outer segments staining red for rhodopsin and the transplant’s nuclei labeled with a green Ku80 stain. Additionally, DAPI stain (blue) marks both rat and human nuclei.
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Transplantation of retinal organoid sheets offers hope to patients afflicted with retinal degenerative diseases. 

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