Preventing Eye Redness. 1  1. Determine the cause of your eye redness. 2  2. Reduce the amount of time you look at screens. 3  3. Adjust your electronic screens.  4. Avoid 1  smoking. 5. Limit your alcohol intake.  6. Eat a balanced 1  diet. 7. Get plenty of 2  sleep. 8. Manage your allergies.