MILLIONS of Brits are suffering from eye problems dubbed ‘coronavision’ after their sight deteriorated during lockdown, according to a study for the College of Optometrists.  One in five adults in the country say their vision has become worse in the past four months, with one in three blaming it on too much screen time.  Symptoms include blurry vision, difficulty focusing, and red or painful eyes, but many sufferers have simply put it down to eyestrain and thought it too trivial to…