about a remarkable new treatment for blindness that involves gene therapy. here's dr. jon lapook. here's dr. jon lapook. >> reporter: 63-year-old jonathan wyatt was diagnosed at age 20 with a rare genetic disorder that causes progressive blindness. in recent years he was unable to read. he was one of six patients in the gene therapy trial. >> when i got home i looked at diana's mobile phone and i said a virus, the retinal cells started producing the protein. all six patients had improved vision and two-- including wyatt-- had dramatic results. robert mclaren of oxford university led the study. >> rather than taking a pill or proteins or taking tablets, we're actually correcting the disease at the genetic level.