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A Blind Man Had His Eyesight Partially Restored, In A First Of Such Successful Treatment In Human Using Optogenetic Therapy And Engineered Goggles. The 58-Year-Old Man, For 40 Years, Was Afflicted With A Neurodegenerative Eye Disease, Retinitis Pigmentosa, Which Changes How The Retina Responds To Light, Which Could Lead To Total Blindness.

Man blind for 40 years partially regains sight with new gene therapy: "A major breakthrough" – CBS News

https://www.cbsnews.com/news/gene-therapy-treatment-blindness-retinitis-pigmentosa/

Within a year of the study, the man was shocked when he was walking down the street and noticed the white stripes of a crosswalk.