sleep depreviation always does it for me. but there are a series of exercises you can do for your eyes, like taking a break while working to focus on something far away and holding your hands over them to rest them (this is apparently better than just shutting them for a while). you might want to google for a better description, or use the cute program workrave, which will prompt you to do those.
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Date: Thursday, 12 January 2006 03:49 pm (UTC)