Abandoning your glasses is not the normal advice from opticians, but it has helped to land Cardiff lad, Louis Cottrell, a place in the national basketball squad. For Louis, 11, who has been wearing specs since he was seven, sport is a passion, but always hindered by the need for prescription sports goggles.  His optician suggested trying a novel overnight form of vision correction, called Ortho-k, with great results – “Now I can now see perfectly well without my glasses….