Derek Rabelo, aged 23, born with glaucoma, grew up in Brazil's coastal city of Guarapari with a surf-mad father and two uncles who were professional surfers.
When he was 17 years old, his father gifted him a surf board and five years later, he became a professional surfer travelling the world's most famous surf breaks.
Rabello says he can hear sets approaching and can feel his position on a wave by the different sounds of water around him. Touching the wave too helps him to sense its dynamics.
