MILLIONS of adults over 40 feel ‘held back’ in their careers because of failing eyesight, according to research.A survey of 1, 500 UK employed adults aged between 40 and 60 found just under a third feel ‘stuck in a rut’ when it comes to their employment.... 2 Half of Brits quizzed in a new poll want to leave their jobs and switch to a new dream career 2 But many, like Martine McCutcheon, fear they're being held back by their eyesight Credit: Instagram And one in 10 blame their deteriorating eye