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UVEITIS
Uveitis
is the term used to describe inflammation inside the eye. Iritis,
vasculitis, choroiditis and several other medical terms which end
in "-itis" can be used to describe the particular type or location
of the uveitis.
What
are the symptoms of Uveitis?
With
severe eye inflammation, patients experience red eye, pain, light
sensitivity and blurred vision. If inflammation is more mild, symptoms
may be limited to floaters and blurred vision.
What
causes Uveitis?
This
question is best answered by taking a careful eye and medical history,
and performing appropriate laboratory tests. This may include blood
testing, urine testing, chest x-ray. Access to previous medical
records, previous laboratory tests, and other health data from the
past may be quite helpful.
Can
a cause always be identified? With a thorough evaluation, clues
to the correct diagnosis often are identified and in many cases
the exact diagnosis can be pinpointed. However, sometimes the work
up and laboratory testing do not give a clue to the cause. This
indicates that there is no associated disease in any other part
of the body, and that inflammation is isolated to the eye. The patients
often have the best prognosis.
What
are some common causes of uveitis?
Uveitis
can be caused by an over-active immune system (autoimmune uveitis)
or by a "germ" (infectious uveitis).
Autoimmune
diseases which affect the joints may also affect the eye. Ankylosing
spondylitis, Reiter's syndrome, psoriatic arthritis, and rheumatoid
arthritis in children are good examples. Inflammatory bowel diseases
such as ulcerative colitis and Crohn's disease are also associated
with uveitis. Sarcoidosis is autoimmune disease which can cause
inflammation in the lungs, skin, and brain as well as the eyes.
Infectious
uveitis can be caused by a virus, bacteria, fungus or parasite.
The uveitis symptoms usually result from the bodies efforts to fight
off the invader. Herpes simplex ("cold sore" virus), herpes zoster
(chicken pox and shingles virus), Lyme disease, syphilis, tuberculosis
and toxoplasmosis (a common parasite) can all have eye inflammation
as their first symptom.
How
is Uveitis treated?
Infectious
uveitis is treated by using the appropriate antibiotic to cure the
infection. Because the body's response to an invading microbe may
be as damaging as the infection itself, anti-inflammatory treatments
used for autoimmune uveitis may be appropriate in some types infectious
uveitis.
The
first line treatment for autoimmune uveitis is corticosteroid eye
drops. A dilating eye drop may be prescribe for comfort. In more
severe cases, a corticosteroid medication may given as an injection,
or by mouth (e.g. prednisone). Note that corticosteroids are not
the same as androgenic steroids, the drugs sometimes used by athletes.
Non-steroidal
anti-inflammatory drugs (also known as NSAIDs), cyclosporine and
chemotherapeutic agents are also used. Anti-inflammatory drugs are
quite successful in controlling autoimmune uveitis, but they do
not necessarily provide a cure. Continuing use of medication(s)
may be necessary for months or even years in the most severe cases.
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