From an AP story by Laura Ungar and Freida Frisaro headlined “Gene therapy eyedrops restored a boy’s sight. Similar treatments could help millions.”:

Dr. Alfonso Sabater pulled up two photos of Antonio Vento Carvajal’s eyes. One showed cloudy scars covering both eyeballs. The other, taken after months of gene therapy given through eyedrops, revealed no scarring on either eye.

Antonio, who’s been legally blind for much of his 14 years, can see again.