(
Greek for '''dry eyes''') is a medical condition in which the
Eye fails to produce
Tears . It may be caused by a deficiency in
Vitamin A and is sometimes used to describe that lack, although there may be other causes.
Xerophthalmia is a term that usually implies a destructive dryness of the conjunctival epithelium due to dietary
Vitamin A deficiency—a condition virtually forgotten in developed countries, but still causing much damage in developing countries. Other forms of dry eye are associated with aging, poor lid closure, scarring from previous injury, or autoimmune diseases such as
Rheumatoid Arthritis , and these can all cause chronic conjunctivitis.
Xerophthalmia can be associated with systemic diseases such as
Sjögren's Syndrome ,
Systemic Lupus Erythematosus ,
Rheumatoid Arthritis ,
Scleroderma ,
Sarcoidosis ,
Amyloidosis , and
Hypothyroidism ; deficiency of
Vitamin A ; and the use of some medications including
Antihistamine s,
Nasal Decongestant s,
Tranquilizer s, and
Anti-depressant drugs. Xerophthalmia results from inadequate function of the
Lacrimal Glands which produce tears. When xerophthalmia is due to vitamin A deficiency, the condition begins with night blindness and
Conjunctival Xerosis (dryness of the eye membranes) and progresses to
Corneal Xerosis (dryness of the cornea), and, in the late stages, to
Keratomalacia (softening of the cornea).
The treatment depends on the cause.
Artificial Tears , which lubricate the eye, are the principal symptomatic treatment for dry eye. They are available over-the-counter as eye drops. Using
Humidifier s, wearing wrap-around glasses when outside, and avoiding outside windy and dry conditions may bring relief. For people with severe cases of dry eye, temporary or permanent closure of the tear drain (small openings at the inner corner of the eyelids where tears drain from the eye) may be helpful. Also known as
Conjunctivitis Arida .
