In First Human Test of Optogenetics, Doctors Aim to Restore Sight to the Blind

If all goes according to plan, sometime next month a surgeon in Texas will use a needle to inject viruses laden with DNA from a light-sensitive algae into the eye of a legally blind person in a bet that it could let the patient see again, if only in blurry black-and-white. The study, sponsored by a startup called RetroSense Therapeutics, of Ann Arbor, Michigan, is expected to be the first human test of optogenetics, a technology developed in neuroscience labs that uses a combination of gene therapy and light to precisely control nerve cells. The trial, to be carried out by doctors at the Retina Foundation of the Southwest, will involve as many as 15 patients with retinitis pigmentosa, a degenerative disease in which the specialized light-sensitive photoreceptor cells in…


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