Since many of us spend most of the day focusing on objects that are relatively close (like this magazine), our eyes' ability to focus on distant objects often suffers. Focusing exercises include rapidly shifting our focus from close to far. Just cup your right hand over your right eye and hold your left thumb up at arm's length. Focus on your thumbnail, and then quickly shift your focus to an object well beyond your thumb. As soon as that object comes into focus, return your gaze to your thumbnail. Do this 20 to 40 times for each eye. Yes, it is tiring! But the more you do it, the stronger your eyes will become, and the speed with which you are able to shift your focus from your bike's instruments to the road ahead will be faster, giving you more time to react.