Focusing closely at any object for long periods causes eye strain and fatigue. If you are doing extensive computer work, we recommend following the 20/20/20 rule. Every 20 minutes look at a distant object (at least 20 feet away) for 20 seconds. This will relax the muscles in your eyes and help to prevent strain. Also, your eyes can become dry from staring at the computer screen for long periods, if so keep some artificial tears on hand.
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