Dry Eye Syndrome
Dry eye syndrome (DES or "dry eye") is the chronic lack of sufficient lubrication and moisture on the surface of the eye. Its consequences range from minor irritations, to the inability to wear contact lenses and an increased risk of corneal inflammation and eye infections.
Signs and Symptoms of Dry Eye
Persistent dryness, scratchiness and a burning sensation on your eyes are common symptoms of dry eye syndrome. These symptoms alone may be enough for Dr. Hanson to diagnose dry eye syndrome. Sometimes, he may want to measure the amount of tears in your eyes. A thin strip of filter paper placed at the edge of the eye, called a Schirmer test, is one way of measuring this.
Some people with dry eyes also experience a "foreign body sensation" the feeling that something is in the eye. And it may seem odd, but sometimes dry eye syndrome can cause watery eyes, because the excessive dryness works to overstimulate production of the watery component of your eye's tears which dilutes its wetting components. It may seem counter intuitive but the solution for excessive tearing maybe the application of additional artificial tears.
What Causes Dry Eyes?
In dry eye syndrome, the tear glands that moisturize the eye don't produce enough tears, or the tears have a chemical composition that causes them to evaporate too quickly.
Dry eye syndrome has several causes. It occurs:
Treatment for Dry Eye
Dry eye syndrome is an ongoing condition that treatments may be unable to cure. But the symptoms of dry eye including dryness, scratchiness and burning can usually be successfully managed.
Artificial tears may be recommended, which are lubricating eye drops that may alleviate the dry, scratching feeling and foreign body sensation of dry eye. Prescription eye drops such as Restasis go one step further: they help increase your tear production and treat the surface of the cornea.If you wear contact lenses, be aware that some artificial tears cannot be used during contact lens wear. You may need to remove your lenses before using the drops. Wait 5 minutes or longer (check the label) before reinserting them. For mild dry eye, contact lens rewetting drops may be sufficient to make your eyes feel better, but the effect is usually only temporary. Switching to another lens brand could also help.Check the label, but better yet, check with us before buying any over-the-counter eye drops. We will know which formulas are effective and long-lasting and which are not, as well as which eye drops will work with your contact lenses.To reduce the effects of sun, wind and dust on dry eyes, wear sunglasses when outdoors. Wraparound styles with UV absorption offer the best protection.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.
For more significant cases of dry eye, we may recommend punctal plugs. These tiny devices are inserted in ducts in your lids to slow the drainage of tears away from your eyes, thereby keeping your eyes more moist. http://www.allaboutvision.com/conditions/punctal-plugs.htm
If medications are the cause of dry eyes, discontinuing the drug generally resolves the problem. But in this case, the benefits of the drug must be weighed against the side effect of dry eyes. Sometimes switching to a different type of medication alleviates the dry eye symptoms while keeping the needed treatment. In any case, never switch or discontinue your medications without consulting with your doctor first.
Treating any underlying eyelid disease, such as blepharitis, helps as well. This may call for antibiotic or steroid drops, plus frequent eyelid scrubs with an antibacterial shampoo.
If you are considering LASIK, be aware that dry eyes may disqualify you for the surgery, at least until your dry eye condition is successfully treated. Dry eyes increase your risk for poor healing after LASIK, so most surgeons will want to treat the dry eyes first, to ensure a good LASIK outcome. This goes for other types of vision correction surgery, as well.