Lthe first study, published in the journal Nature Medicine, concerned only one patient, but it promises wonders. A man with retinopathy pigmentosa has partially recovered some of his sight with optogenetic therapy.
In this disease of the retina, the photoreceptors – cells capable of picking up light and transforming the light message into an electrical message – degenerate, leading inexorably to blindness. “Our patient was diagnosed as a teenager. He was able to work until his forties, but he had been completely blind for about fifteen years ”, specifies José-Alain Sahel, founder of the Institut de la vision (Paris), head of the ophthalmology department at the University of Pittsburgh and first author of the study.
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