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Imaging rod photoreceptors in RP. Shown is a split detector image of the photoreceptor mosaic in a 49-year-old subject with autosomal recessive RP due to mutations in the USH2A gene. The panel on the right is the same image, with white arrows indicating the location of presumed remnant rod photoreceptors, which are much smaller in size than the larger cone inner segments. Scale bar = 50 μm.
