Video captures 40-year-old woman hearing for the first time

An amazing caught-on-tape moment shows a 40-year-old British woman who had been deaf her whole life hearing for the first time.

Joanne Milne
YouTube/Tremayne Crossley
Joanne Milne was deaf due to Usher syndrome, a genetic condition that causes hearing loss but also affects vision. About 3 to 6 percent of children who are deaf have the syndrome, according to the National Institute on Deafness and Other Communication Disorders.

After being fitted with two cochlear implants, friend Tremayne Crossley posted a YouTube video of Milne hearing the days of the week read to her -- the first words she'd ever heard.

"The switch-on was the most emotional and overwhelming experience of my life and I'm still in shock now," she told the BBC.

Watch above as she's overcome with emotion from hearing for the first time.