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Photoelectric Dye May Restore Some Sight to the Blind

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Photoelectric dyes may be used to send images to the brains of the blind, potentially presenting a simpler alternative to artificial eyes based on image sensors. Blind patients with hereditary diseases such as retinitis pigmentosa have dead photoreceptor cells, but other neurons involved in sight remain alive and can be stimulated artificially. Researchers from Okayama University and Okayama University of Science tested the dye in genetically blind rats and found they were able to follow the direction of movement of a spinning drum painted with vertical black and white stripes. ...Read full article

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