Related: World's first eye transplant recipient displays remarkable recovery after 21-hour surgery
A Canadian man, Brent Chapman, has regained his eyesight after 20 years thanks to a rare and complex "tooth-in-eye" surgery.
Mr Chapman, 34, lost his vision at the age of 13 due to Stevens-Johnson Syndrome, a severe allergic reaction to ibuprofen.
The procedure, known as osteo-odonto-keratoprosthesis, involves extracting a tooth, inserting an optical lens, and then implanting this "tooth-lens" into the eye.
Performed by ophthalmologist Dr Greg Moloney, the surgery was carried out in two stages between February and August, with the final adjustment in August.
Mr Chapman now has 20/30 vision, and his first sight after the surgery was the Vancouver skyline, an experience he described as "surreal and euphoric".