Relax your eyes after a day of near work
Exercise of the day: look at the video and then divert your gaze. What happened? By looking into the spiral your brain is tricked into thinking you are looking at an ever farther target. The instant you look away they need to readjust drastically again to reality. This exercise can be used to teach your eyes to relax. Normally you are able to see more with a relaxed gaze than by squinting at a certain object.