Doctors say they have achieved the previously impossible - restoring sight and preventing blindness in people with a rare but dangerous eye conditon called hypotony.
Moorfields hospital in London is the world's first dedicated clinic for the disorder and seven out of eight patients given the pioneering treatment have responded to the therapy, a pilot study shows.
One of them - the first ever - is Nicki Guy, 47, who is sharing her story exclusively with the BBC.
She says the results are incredible: "It's life-changing. It's given me everything back. I can see my child grow up.
"I've gone from counting fingers and everything being really blurry to being able to see."
