Xerosis is a condition characterised by
abnormal dryness of the conjunctiva
(of the eye),
the skin, or mucous membranes.
Note that Xerosis is a general dry-skin condition,
not specific to the skin of or around the eyes. However, when the
dryness is of the conjunctiva, xerosis may be treated
as an ophthalmic condition.
Xerosis affecting the conjunctiva is sometimes known
as conjunctival xerosis. This is not necessarily due
to a reduction in the production of tears (that moisten and help to clean
the eye), but to changes in the membrane - which can become grey and thickened
in the area exposed when the eye is open. Nevertheless, some sources mention
"deficiency of tears or conjunctival secretions" in connection
with conjunctival xerosis. Some sources also mention
the possibility of deficiency of vitamin "A" being a factor.
See also xerophthalmia.
As applies for all medical concerns, professional diagnosis and assessment
in person is important.
More about Ophthalmology: This section includes short definitions
of many diseases, disorders, and conditions of the eyes and visual system.
For definitions of other terms in this category, choose from the list
to the left (but note that this is not a complete/exhaustive list).
Other related pages include the diagram
of the eye, and definitions
of parts of the eye, a description
of the human retina, and definitions
of parts of the retina, and the section of short definitions
of clinical and surgical procedures re. eyes and human visual system.
For further information see also our section of Books
about Ophthalmology. |
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This Section
is about
Diseases
and Disorders of the Eyes and Visual System.
To read about other diseases, disorders, or conditions of the eye and
human visual system, use the links on the left-side of this page.
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