I think if you really feel your eyes extremely dry, you should see a doctor and make sure whether you suffer from dry eye. Persistent dryness, scratchiness and a burning sensation in your eyes are symptoms of dry eyes. These symptoms alone may prompt your eye doctor to diagnose dry eye syndrome. You can drop artificial tears, which are lubricating eye drops that may alleviate the dry, scratchy feeling. If you wear contact lenses, be aware that many eye drops, especially artificial tears, cannot be used while your contacts are in your eyes. You'll need to remove them before using drops and wait 15 minutes or even longer (check the label) before reinserting the lenses. Indoors, an air cleaner can filter out dust and other particles from the air, while a humidifier adds moisture to air that's too dry because of air conditioning or heating. Outdoors , a pair of glasses in necessary.