You’re staring at the sky on a sunny day when you notice, in the corner of your eye, a transparent squiggle floating slowly across the blue. You try and focus on it, but it eludes your glance, refusing to be resolved. No matter where you look, the squiggle knows.
Do you spend more than seven hours a day parked in front of a computer monitor? Results from a newly published study suggest you could be stripping your "tear film" of a component that helps keep your eyes clean, lubricated and healthy.