text: Wilfried Hannes ( born 17 May 1957 in DÃ 1\/4 ren-Echtz ) is a former German football player and manager , known for achieving his career despite being visually impaired after a pupil-tumor had caused him to lose his sight in his right eye as a child .
simplified: Wilfried Hannes ( born 17 May , 1957 ) is a former German football player .