When Karly Cox popped to Specsavers for her regular check up, she expected the optician to give her a stronger prescription to tackle her recent headaches.
But the routine check uncovered something much more sinister - a "ticking-time bomb" tumour - and saved her life.
After the experts at her local branch in Midsomer Norton noticed a strange shadow in her scan in January, she was sent to Bristol Eye Hospital where she was told she had ocular melanoma - an eye cancer that develops from pigment-producing cells.
