Your ophthalmologist may close these canals either temporarily or permanently. This closure conserves your own tears and makes artificial tears last longer. Other methods may include steps to prevent the evaporation of tears. In winter, when indoor heat is on, a humidifier or a pan of water on the radiator will add moisture to dry air. Anything that adds to dryness such as an overly warm room, hair dryers, or wind should be avoided by a person with dry eye.
Smoking is especially bothersome.
This symptom can be treated by using an ointment at bedtime. Use the smallest amount of ointment necessary for comfort, since the ointment can cause your vision to blur temporarily. Dry eye caused by a lack of vitamin A in the diet is rare in the United States, but is more common in poorer countries. Ointments containing vitamin A can help dry eye caused by this unusual condition. Vitamin A does not seem to help people with ordinary dry eye.