If you find yourself with tired eyes at the end of the day, you’re not alone. A new study says the average office worker spends nearly 1,700 hours per year in front of a computer screen. That’s about 6.5 hours a day! You’re doing it right now. 37% of the respondents reported getting regular headaches from the strain; making things worse by moving their screens even closer to their faces once eye strain set in. And the stress is far worse after you factor in staring at mobile devices.