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Aging is one of the most common causes of dry eyes because tear production decreases with age. [4] Several classes of medications (both prescription and OTC) have been hypothesized as a major cause of dry eye, especially in the elderly. Particularly, anticholinergic medications that also cause dry mouth are believed to promote dry eye. [25]
[12] [13] Besides leading to dry eyes, the obstructions can be degraded by bacterial lipases, resulting in the formation of free fatty acids, which irritate the eyes and sometimes cause punctate keratopathy. Meibomian gland dysfunction is more often seen in women and is regarded as the main cause of dry eye disease.
Xerophthalmia (from Ancient Greek xērós (ξηρός) meaning "dry" and ophthalmos (οφθαλμός) meaning "eye") is a medical condition in which the eye fails to produce tears. It may be caused by vitamin A deficiency, [1] which is sometimes used to describe that condition, although there may be other causes.
Suddenly having dry eyes is likely related to an environmental trigger, although an underlying medical condition is also possible. Find answers here.
These often have specific causes and treatments. It is possible to have dry eyes without any other signs or symptoms, but this usually causes a syndrome of eye symptoms called keratoconjunctivitis sicca. More generalized dryness can be caused by e.g. dehydration (that is, more general loss of body fluids), [1] anticholinergic drugs and Sjögren ...
Since dry eyes and dry mouth are very common symptoms, and frequently occur in people over 40, affected people may believe that the symptoms are age-related, so ignore them. Some medications can cause symptoms similar to those of Sjögren's syndrome.
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