It's 2:00 p.m. and you have a few more hours until the end of your workday.
Your eyes sting, your vision is getting blurry and your head hurts. The computer screen that you've been staring at for the past six hours seems so bright that you want to shut your eyes.
Sound familiar? We'd bet yes.
Piotr Le, a Georgetown University grad student, thinks so, too. He used to work in consulting — and that meant staring at a computer screen for 12 or more hours every workday.