Staring at a computer monitor for hours on end can wreak havoc on your eyes. If you can't see the cards in front of you, you will not be of much use on the felt, so make sure you take the proper precautions and protect your vision while you grind into the long hours of the night. By making just a few simple changes you can lower your risk for problems down the line and ward off dreaded migraines which plague many an online poker player.